{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-50373", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-17T14:53:06.995Z", "datePublished": "2025-09-17T14:56:28.282Z", "dateUpdated": "2026-05-11T19:18:18.114Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:18:18.114Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs: dlm: fix race in lowcomms\n\nThis patch fixes a race between queue_work() in\n_dlm_lowcomms_commit_msg() and srcu_read_unlock(). The queue_work() can\ntake the final reference of a dlm_msg and so msg->idx can contain\ngarbage which is signaled by the following warning:\n\n[ 676.237050] ------------[ cut here ]------------\n[ 676.237052] WARNING: CPU: 0 PID: 1060 at include/linux/srcu.h:189 dlm_lowcomms_commit_msg+0x41/0x50\n[ 676.238945] Modules linked in: dlm_locktorture torture rpcsec_gss_krb5 intel_rapl_msr intel_rapl_common iTCO_wdt iTCO_vendor_support qxl kvm_intel drm_ttm_helper vmw_vsock_virtio_transport kvm vmw_vsock_virtio_transport_common ttm irqbypass crc32_pclmul joydev crc32c_intel serio_raw drm_kms_helper vsock virtio_scsi virtio_console virtio_balloon snd_pcm drm syscopyarea sysfillrect sysimgblt snd_timer fb_sys_fops i2c_i801 lpc_ich snd i2c_smbus soundcore pcspkr\n[ 676.244227] CPU: 0 PID: 1060 Comm: lock_torture_wr Not tainted 5.19.0-rc3+ #1546\n[ 676.245216] Hardware name: Red Hat KVM/RHEL-AV, BIOS 1.16.0-2.module+el8.7.0+15506+033991b0 04/01/2014\n[ 676.246460] RIP: 0010:dlm_lowcomms_commit_msg+0x41/0x50\n[ 676.247132] Code: fe ff ff ff 75 24 48 c7 c6 bd 0f 49 bb 48 c7 c7 38 7c 01 bd e8 00 e7 ca ff 89 de 48 c7 c7 60 78 01 bd e8 42 3d cd ff 5b 5d c3 <0f> 0b eb d8 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48\n[ 676.249253] RSP: 0018:ffffa401c18ffc68 EFLAGS: 00010282\n[ 676.249855] RAX: 0000000000000001 RBX: 00000000ffff8b76 RCX: 0000000000000006\n[ 676.250713] RDX: 0000000000000000 RSI: ffffffffbccf3a10 RDI: ffffffffbcc7b62e\n[ 676.251610] RBP: ffffa401c18ffc70 R08: 0000000000000001 R09: 0000000000000001\n[ 676.252481] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000005\n[ 676.253421] R13: ffff8b76786ec370 R14: ffff8b76786ec370 R15: ffff8b76786ec480\n[ 676.254257] FS: 0000000000000000(0000) GS:ffff8b7777800000(0000) knlGS:0000000000000000\n[ 676.255239] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 676.255897] CR2: 00005590205d88b8 CR3: 000000017656c003 CR4: 0000000000770ee0\n[ 676.256734] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 676.257567] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[ 676.258397] PKRU: 55555554\n[ 676.258729] Call Trace:\n[ 676.259063] <TASK>\n[ 676.259354] dlm_midcomms_commit_mhandle+0xcc/0x110\n[ 676.259964] queue_bast+0x8b/0xb0\n[ 676.260423] grant_pending_locks+0x166/0x1b0\n[ 676.261007] _unlock_lock+0x75/0x90\n[ 676.261469] unlock_lock.isra.57+0x62/0xa0\n[ 676.262009] dlm_unlock+0x21e/0x330\n[ 676.262457] ? lock_torture_stats+0x80/0x80 [dlm_locktorture]\n[ 676.263183] torture_unlock+0x5a/0x90 [dlm_locktorture]\n[ 676.263815] ? preempt_count_sub+0xba/0x100\n[ 676.264361] ? complete+0x1d/0x60\n[ 676.264777] lock_torture_writer+0xb8/0x150 [dlm_locktorture]\n[ 676.265555] kthread+0x10a/0x130\n[ 676.266007] ? kthread_complete_and_exit+0x20/0x20\n[ 676.266616] ret_from_fork+0x22/0x30\n[ 676.267097] </TASK>\n[ 676.267381] irq event stamp: 9579855\n[ 676.267824] hardirqs last enabled at (9579863): [<ffffffffbb14e6f8>] __up_console_sem+0x58/0x60\n[ 676.268896] hardirqs last disabled at (9579872): [<ffffffffbb14e6dd>] __up_console_sem+0x3d/0x60\n[ 676.270008] softirqs last enabled at (9579798): [<ffffffffbc200349>] __do_softirq+0x349/0x4c7\n[ 676.271438] softirqs last disabled at (9579897): [<ffffffffbb0d54c0>] irq_exit_rcu+0xb0/0xf0\n[ 676.272796] ---[ end trace 0000000000000000 ]---\n\nI reproduced this warning with dlm_locktorture test which is currently\nnot upstream. However this patch fix the issue by make a additional\nrefcount between dlm_lowcomms_new_msg() and dlm_lowcomms_commit_msg().\nIn case of the race the kref_put() in dlm_lowcomms_commit_msg() will be\nthe final put."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/dlm/lowcomms.c"], "versions": [{"version": "b38bc9c2b3171f4411d80015ecb876bc6f9bcd26", "lessThan": "27d3e646dd83bafd7094890462eebfce3ac31e4a", "status": "affected", "versionType": "git"}, {"version": "b38bc9c2b3171f4411d80015ecb876bc6f9bcd26", "lessThan": "eb97e60a9eae632ff9104a580dbc4fdc58dc23cb", "status": "affected", "versionType": "git"}, {"version": "b38bc9c2b3171f4411d80015ecb876bc6f9bcd26", "lessThan": "de7fdff754bb4d01e38e19964c309b6df6a79472", "status": "affected", "versionType": "git"}, {"version": "b38bc9c2b3171f4411d80015ecb876bc6f9bcd26", "lessThan": "30ea3257e8766027c4d8d609dcbd256ff9a76073", "status": "affected", "versionType": "git"}, {"version": "7ae861bbfa0f69bd36bdff47f9755ad67a2bd219", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/dlm/lowcomms.c"], "versions": [{"version": "5.14", "status": "affected"}, {"version": "0", "lessThan": "5.14", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.75", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.17", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.3", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "5.15.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "5.19.17"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.0.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/27d3e646dd83bafd7094890462eebfce3ac31e4a"}, {"url": "https://git.kernel.org/stable/c/eb97e60a9eae632ff9104a580dbc4fdc58dc23cb"}, {"url": "https://git.kernel.org/stable/c/de7fdff754bb4d01e38e19964c309b6df6a79472"}, {"url": "https://git.kernel.org/stable/c/30ea3257e8766027c4d8d609dcbd256ff9a76073"}], "title": "fs: dlm: fix race in lowcomms", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-50373", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-14T18:36:47.932587Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:43:00.519Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-50373", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-14T18:36:47.932587Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:36:43.623Z"}}], "cna": {"title": "fs: dlm: fix race in lowcomms", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "b38bc9c2b3171f4411d80015ecb876bc6f9bcd26", "lessThan": "27d3e646dd83bafd7094890462eebfce3ac31e4a", "versionType": "git"}, {"status": "affected", "version": "b38bc9c2b3171f4411d80015ecb876bc6f9bcd26", "lessThan": "eb97e60a9eae632ff9104a580dbc4fdc58dc23cb", "versionType": "git"}, {"status": "affected", "version": "b38bc9c2b3171f4411d80015ecb876bc6f9bcd26", "lessThan": "de7fdff754bb4d01e38e19964c309b6df6a79472", "versionType": "git"}, {"status": "affected", "version": "b38bc9c2b3171f4411d80015ecb876bc6f9bcd26", "lessThan": "30ea3257e8766027c4d8d609dcbd256ff9a76073", "versionType": "git"}, {"status": "affected", "version": "7ae861bbfa0f69bd36bdff47f9755ad67a2bd219", "versionType": "git"}], "programFiles": ["fs/dlm/lowcomms.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.14"}, {"status": "unaffected", "version": "0", "lessThan": "5.14", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.75", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "5.19.17", "versionType": "semver", "lessThanOrEqual": "5.19.*"}, {"status": "unaffected", "version": "6.0.3", "versionType": "semver", "lessThanOrEqual": "6.0.*"}, {"status": "unaffected", "version": "6.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/dlm/lowcomms.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/27d3e646dd83bafd7094890462eebfce3ac31e4a"}, {"url": "https://git.kernel.org/stable/c/eb97e60a9eae632ff9104a580dbc4fdc58dc23cb"}, {"url": "https://git.kernel.org/stable/c/de7fdff754bb4d01e38e19964c309b6df6a79472"}, {"url": "https://git.kernel.org/stable/c/30ea3257e8766027c4d8d609dcbd256ff9a76073"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs: dlm: fix race in lowcomms\n\nThis patch fixes a race between queue_work() in\n_dlm_lowcomms_commit_msg() and srcu_read_unlock(). The queue_work() can\ntake the final reference of a dlm_msg and so msg->idx can contain\ngarbage which is signaled by the following warning:\n\n[ 676.237050] ------------[ cut here ]------------\n[ 676.237052] WARNING: CPU: 0 PID: 1060 at include/linux/srcu.h:189 dlm_lowcomms_commit_msg+0x41/0x50\n[ 676.238945] Modules linked in: dlm_locktorture torture rpcsec_gss_krb5 intel_rapl_msr intel_rapl_common iTCO_wdt iTCO_vendor_support qxl kvm_intel drm_ttm_helper vmw_vsock_virtio_transport kvm vmw_vsock_virtio_transport_common ttm irqbypass crc32_pclmul joydev crc32c_intel serio_raw drm_kms_helper vsock virtio_scsi virtio_console virtio_balloon snd_pcm drm syscopyarea sysfillrect sysimgblt snd_timer fb_sys_fops i2c_i801 lpc_ich snd i2c_smbus soundcore pcspkr\n[ 676.244227] CPU: 0 PID: 1060 Comm: lock_torture_wr Not tainted 5.19.0-rc3+ #1546\n[ 676.245216] Hardware name: Red Hat KVM/RHEL-AV, BIOS 1.16.0-2.module+el8.7.0+15506+033991b0 04/01/2014\n[ 676.246460] RIP: 0010:dlm_lowcomms_commit_msg+0x41/0x50\n[ 676.247132] Code: fe ff ff ff 75 24 48 c7 c6 bd 0f 49 bb 48 c7 c7 38 7c 01 bd e8 00 e7 ca ff 89 de 48 c7 c7 60 78 01 bd e8 42 3d cd ff 5b 5d c3 <0f> 0b eb d8 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48\n[ 676.249253] RSP: 0018:ffffa401c18ffc68 EFLAGS: 00010282\n[ 676.249855] RAX: 0000000000000001 RBX: 00000000ffff8b76 RCX: 0000000000000006\n[ 676.250713] RDX: 0000000000000000 RSI: ffffffffbccf3a10 RDI: ffffffffbcc7b62e\n[ 676.251610] RBP: ffffa401c18ffc70 R08: 0000000000000001 R09: 0000000000000001\n[ 676.252481] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000005\n[ 676.253421] R13: ffff8b76786ec370 R14: ffff8b76786ec370 R15: ffff8b76786ec480\n[ 676.254257] FS: 0000000000000000(0000) GS:ffff8b7777800000(0000) knlGS:0000000000000000\n[ 676.255239] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 676.255897] CR2: 00005590205d88b8 CR3: 000000017656c003 CR4: 0000000000770ee0\n[ 676.256734] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 676.257567] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[ 676.258397] PKRU: 55555554\n[ 676.258729] Call Trace:\n[ 676.259063] <TASK>\n[ 676.259354] dlm_midcomms_commit_mhandle+0xcc/0x110\n[ 676.259964] queue_bast+0x8b/0xb0\n[ 676.260423] grant_pending_locks+0x166/0x1b0\n[ 676.261007] _unlock_lock+0x75/0x90\n[ 676.261469] unlock_lock.isra.57+0x62/0xa0\n[ 676.262009] dlm_unlock+0x21e/0x330\n[ 676.262457] ? lock_torture_stats+0x80/0x80 [dlm_locktorture]\n[ 676.263183] torture_unlock+0x5a/0x90 [dlm_locktorture]\n[ 676.263815] ? preempt_count_sub+0xba/0x100\n[ 676.264361] ? complete+0x1d/0x60\n[ 676.264777] lock_torture_writer+0xb8/0x150 [dlm_locktorture]\n[ 676.265555] kthread+0x10a/0x130\n[ 676.266007] ? kthread_complete_and_exit+0x20/0x20\n[ 676.266616] ret_from_fork+0x22/0x30\n[ 676.267097] </TASK>\n[ 676.267381] irq event stamp: 9579855\n[ 676.267824] hardirqs last enabled at (9579863): [<ffffffffbb14e6f8>] __up_console_sem+0x58/0x60\n[ 676.268896] hardirqs last disabled at (9579872): [<ffffffffbb14e6dd>] __up_console_sem+0x3d/0x60\n[ 676.270008] softirqs last enabled at (9579798): [<ffffffffbc200349>] __do_softirq+0x349/0x4c7\n[ 676.271438] softirqs last disabled at (9579897): [<ffffffffbb0d54c0>] irq_exit_rcu+0xb0/0xf0\n[ 676.272796] ---[ end trace 0000000000000000 ]---\n\nI reproduced this warning with dlm_locktorture test which is currently\nnot upstream. However this patch fix the issue by make a additional\nrefcount between dlm_lowcomms_new_msg() and dlm_lowcomms_commit_msg().\nIn case of the race the kref_put() in dlm_lowcomms_commit_msg() will be\nthe final put."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.75", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.19.17", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.0.3", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.13.2"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:18:18.114Z"}}}, "cveMetadata": {"cveId": "CVE-2022-50373", "state": "PUBLISHED", "dateUpdated": "2026-05-11T19:18:18.114Z", "dateReserved": "2025-09-17T14:53:06.995Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-09-17T14:56:28.282Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9C6956B2-4DF8-4582-B8E4-66E19910BE4C", "versionEndExcluding": "5.15.75", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "19B4C3A4-E5C3-41DC-BB14-BE72858E7D35", "versionEndExcluding": "5.19.17", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5BCD8201-B847-4442-B894-70D430128DEF", "versionEndExcluding": "6.0.3", "versionStartIncluding": "6.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs: dlm: fix race in lowcomms\n\nThis patch fixes a race between queue_work() in\n_dlm_lowcomms_commit_msg() and srcu_read_unlock(). The queue_work() can\ntake the final reference of a dlm_msg and so msg->idx can contain\ngarbage which is signaled by the following warning:\n\n[ 676.237050] ------------[ cut here ]------------\n[ 676.237052] WARNING: CPU: 0 PID: 1060 at include/linux/srcu.h:189 dlm_lowcomms_commit_msg+0x41/0x50\n[ 676.238945] Modules linked in: dlm_locktorture torture rpcsec_gss_krb5 intel_rapl_msr intel_rapl_common iTCO_wdt iTCO_vendor_support qxl kvm_intel drm_ttm_helper vmw_vsock_virtio_transport kvm vmw_vsock_virtio_transport_common ttm irqbypass crc32_pclmul joydev crc32c_intel serio_raw drm_kms_helper vsock virtio_scsi virtio_console virtio_balloon snd_pcm drm syscopyarea sysfillrect sysimgblt snd_timer fb_sys_fops i2c_i801 lpc_ich snd i2c_smbus soundcore pcspkr\n[ 676.244227] CPU: 0 PID: 1060 Comm: lock_torture_wr Not tainted 5.19.0-rc3+ #1546\n[ 676.245216] Hardware name: Red Hat KVM/RHEL-AV, BIOS 1.16.0-2.module+el8.7.0+15506+033991b0 04/01/2014\n[ 676.246460] RIP: 0010:dlm_lowcomms_commit_msg+0x41/0x50\n[ 676.247132] Code: fe ff ff ff 75 24 48 c7 c6 bd 0f 49 bb 48 c7 c7 38 7c 01 bd e8 00 e7 ca ff 89 de 48 c7 c7 60 78 01 bd e8 42 3d cd ff 5b 5d c3 <0f> 0b eb d8 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48\n[ 676.249253] RSP: 0018:ffffa401c18ffc68 EFLAGS: 00010282\n[ 676.249855] RAX: 0000000000000001 RBX: 00000000ffff8b76 RCX: 0000000000000006\n[ 676.250713] RDX: 0000000000000000 RSI: ffffffffbccf3a10 RDI: ffffffffbcc7b62e\n[ 676.251610] RBP: ffffa401c18ffc70 R08: 0000000000000001 R09: 0000000000000001\n[ 676.252481] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000005\n[ 676.253421] R13: ffff8b76786ec370 R14: ffff8b76786ec370 R15: ffff8b76786ec480\n[ 676.254257] FS: 0000000000000000(0000) GS:ffff8b7777800000(0000) knlGS:0000000000000000\n[ 676.255239] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 676.255897] CR2: 00005590205d88b8 CR3: 000000017656c003 CR4: 0000000000770ee0\n[ 676.256734] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 676.257567] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[ 676.258397] PKRU: 55555554\n[ 676.258729] Call Trace:\n[ 676.259063] <TASK>\n[ 676.259354] dlm_midcomms_commit_mhandle+0xcc/0x110\n[ 676.259964] queue_bast+0x8b/0xb0\n[ 676.260423] grant_pending_locks+0x166/0x1b0\n[ 676.261007] _unlock_lock+0x75/0x90\n[ 676.261469] unlock_lock.isra.57+0x62/0xa0\n[ 676.262009] dlm_unlock+0x21e/0x330\n[ 676.262457] ? lock_torture_stats+0x80/0x80 [dlm_locktorture]\n[ 676.263183] torture_unlock+0x5a/0x90 [dlm_locktorture]\n[ 676.263815] ? preempt_count_sub+0xba/0x100\n[ 676.264361] ? complete+0x1d/0x60\n[ 676.264777] lock_torture_writer+0xb8/0x150 [dlm_locktorture]\n[ 676.265555] kthread+0x10a/0x130\n[ 676.266007] ? kthread_complete_and_exit+0x20/0x20\n[ 676.266616] ret_from_fork+0x22/0x30\n[ 676.267097] </TASK>\n[ 676.267381] irq event stamp: 9579855\n[ 676.267824] hardirqs last enabled at (9579863): [<ffffffffbb14e6f8>] __up_console_sem+0x58/0x60\n[ 676.268896] hardirqs last disabled at (9579872): [<ffffffffbb14e6dd>] __up_console_sem+0x3d/0x60\n[ 676.270008] softirqs last enabled at (9579798): [<ffffffffbc200349>] __do_softirq+0x349/0x4c7\n[ 676.271438] softirqs last disabled at (9579897): [<ffffffffbb0d54c0>] irq_exit_rcu+0xb0/0xf0\n[ 676.272796] ---[ end trace 0000000000000000 ]---\n\nI reproduced this warning with dlm_locktorture test which is currently\nnot upstream. However this patch fix the issue by make a additional\nrefcount between dlm_lowcomms_new_msg() and dlm_lowcomms_commit_msg().\nIn case of the race the kref_put() in dlm_lowcomms_commit_msg() will be\nthe final put."}], "id": "CVE-2022-50373", "lastModified": "2026-01-14T19:16:10.563", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-09-17T15:15:36.303", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/27d3e646dd83bafd7094890462eebfce3ac31e4a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/30ea3257e8766027c4d8d609dcbd256ff9a76073"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/de7fdff754bb4d01e38e19964c309b6df6a79472"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/eb97e60a9eae632ff9104a580dbc4fdc58dc23cb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-362"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: fs: dlm: fix race in lowcomms", "id": "2396138", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2396138"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2022-50373", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50373\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50373\nhttps://lore.kernel.org/linux-cve-announce/2025091717-CVE-2022-50373-ce58@gregkh/T"], "threat_severity": "Important"}

{"created": "2025-09-18T11:59:09.630499+00:00", "updated": "2025-09-18T11:59:09.630581+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}