{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-53138", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-05-02T15:51:43.562Z", "datePublished": "2025-05-02T15:56:10.372Z", "dateUpdated": "2026-05-11T19:39:10.829Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:39:10.829Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: caif: Fix use-after-free in cfusbl_device_notify()\n\nsyzbot reported use-after-free in cfusbl_device_notify() [1]. This\ncauses a stack trace like below:\n\nBUG: KASAN: use-after-free in cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138\nRead of size 8 at addr ffff88807ac4e6f0 by task kworker/u4:6/1214\n\nCPU: 0 PID: 1214 Comm: kworker/u4:6 Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nWorkqueue: netns cleanup_net\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n print_address_description.constprop.0.cold+0xeb/0x467 mm/kasan/report.c:313\n print_report mm/kasan/report.c:429 [inline]\n kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491\n cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138\n notifier_call_chain+0xb5/0x200 kernel/notifier.c:87\n call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945\n call_netdevice_notifiers_extack net/core/dev.c:1983 [inline]\n call_netdevice_notifiers net/core/dev.c:1997 [inline]\n netdev_wait_allrefs_any net/core/dev.c:10227 [inline]\n netdev_run_todo+0xbc0/0x10f0 net/core/dev.c:10341\n default_device_exit_batch+0x44e/0x590 net/core/dev.c:11334\n ops_exit_list+0x125/0x170 net/core/net_namespace.c:167\n cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594\n process_one_work+0x996/0x1610 kernel/workqueue.c:2289\n worker_thread+0x665/0x1080 kernel/workqueue.c:2436\n kthread+0x2e9/0x3a0 kernel/kthread.c:376\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302\n </TASK>\n\nWhen unregistering a net device, unregister_netdevice_many_notify()\nsets the device's reg_state to NETREG_UNREGISTERING, calls notifiers\nwith NETDEV_UNREGISTER, and adds the device to the todo list.\n\nLater on, devices in the todo list are processed by netdev_run_todo().\nnetdev_run_todo() waits devices' reference count become 1 while\nrebdoadcasting NETDEV_UNREGISTER notification.\n\nWhen cfusbl_device_notify() is called with NETDEV_UNREGISTER multiple\ntimes, the parent device might be freed. This could cause UAF.\nProcessing NETDEV_UNREGISTER multiple times also causes inbalance of\nreference count for the module.\n\nThis patch fixes the issue by accepting only first NETDEV_UNREGISTER\nnotification."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/caif/caif_usb.c"], "versions": [{"version": "7ad65bf68d705b445ef10b77ab50dab22be185ee", "lessThan": "68a45c3cf0e2242a533657f4f535d9b6a7447a79", "status": "affected", "versionType": "git"}, {"version": "7ad65bf68d705b445ef10b77ab50dab22be185ee", "lessThan": "1793da97a23e31c5bf06631f3f3e5a25f368fd64", "status": "affected", "versionType": "git"}, {"version": "7ad65bf68d705b445ef10b77ab50dab22be185ee", "lessThan": "9dc16be373b382ddd4c274052a6e870a95e76c01", "status": "affected", "versionType": "git"}, {"version": "7ad65bf68d705b445ef10b77ab50dab22be185ee", "lessThan": "c3aaec463a632cf4187dc017e421bfa69d7834a9", "status": "affected", "versionType": "git"}, {"version": "7ad65bf68d705b445ef10b77ab50dab22be185ee", "lessThan": "3f14457e1584224f4296af613bbd99deb60b5d91", "status": "affected", "versionType": "git"}, {"version": "7ad65bf68d705b445ef10b77ab50dab22be185ee", "lessThan": "287027d8a567168a5d8ce5cb0cba16a34791a48c", "status": "affected", "versionType": "git"}, {"version": "7ad65bf68d705b445ef10b77ab50dab22be185ee", "lessThan": "d1a11bbdbb5ea9f172019c5a4a3e9d8eabd72179", "status": "affected", "versionType": "git"}, {"version": "7ad65bf68d705b445ef10b77ab50dab22be185ee", "lessThan": "9781e98a97110f5e76999058368b4be76a788484", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/caif/caif_usb.c"], "versions": [{"version": "3.3", "status": "affected"}, {"version": "0", "lessThan": "3.3", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.310", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.278", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.237", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.175", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.103", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.20", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2.7", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.3", "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": "3.3", "versionEndExcluding": "4.14.310"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "4.19.278"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "5.4.237"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "5.10.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "5.15.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "6.1.20"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "6.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "6.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/68a45c3cf0e2242a533657f4f535d9b6a7447a79"}, {"url": "https://git.kernel.org/stable/c/1793da97a23e31c5bf06631f3f3e5a25f368fd64"}, {"url": "https://git.kernel.org/stable/c/9dc16be373b382ddd4c274052a6e870a95e76c01"}, {"url": "https://git.kernel.org/stable/c/c3aaec463a632cf4187dc017e421bfa69d7834a9"}, {"url": "https://git.kernel.org/stable/c/3f14457e1584224f4296af613bbd99deb60b5d91"}, {"url": "https://git.kernel.org/stable/c/287027d8a567168a5d8ce5cb0cba16a34791a48c"}, {"url": "https://git.kernel.org/stable/c/d1a11bbdbb5ea9f172019c5a4a3e9d8eabd72179"}, {"url": "https://git.kernel.org/stable/c/9781e98a97110f5e76999058368b4be76a788484"}], "title": "net: caif: Fix use-after-free in cfusbl_device_notify()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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This\ncauses a stack trace like below:\n\nBUG: KASAN: use-after-free in cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138\nRead of size 8 at addr ffff88807ac4e6f0 by task kworker/u4:6/1214\n\nCPU: 0 PID: 1214 Comm: kworker/u4:6 Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nWorkqueue: netns cleanup_net\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n print_address_description.constprop.0.cold+0xeb/0x467 mm/kasan/report.c:313\n print_report mm/kasan/report.c:429 [inline]\n kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491\n cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138\n notifier_call_chain+0xb5/0x200 kernel/notifier.c:87\n call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945\n call_netdevice_notifiers_extack net/core/dev.c:1983 [inline]\n call_netdevice_notifiers net/core/dev.c:1997 [inline]\n netdev_wait_allrefs_any net/core/dev.c:10227 [inline]\n netdev_run_todo+0xbc0/0x10f0 net/core/dev.c:10341\n default_device_exit_batch+0x44e/0x590 net/core/dev.c:11334\n ops_exit_list+0x125/0x170 net/core/net_namespace.c:167\n cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594\n process_one_work+0x996/0x1610 kernel/workqueue.c:2289\n worker_thread+0x665/0x1080 kernel/workqueue.c:2436\n kthread+0x2e9/0x3a0 kernel/kthread.c:376\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302\n </TASK>\n\nWhen unregistering a net device, unregister_netdevice_many_notify()\nsets the device's reg_state to NETREG_UNREGISTERING, calls notifiers\nwith NETDEV_UNREGISTER, and adds the device to the todo list.\n\nLater on, devices in the todo list are processed by netdev_run_todo().\nnetdev_run_todo() waits devices' reference count become 1 while\nrebdoadcasting NETDEV_UNREGISTER notification.\n\nWhen cfusbl_device_notify() is called with NETDEV_UNREGISTER multiple\ntimes, the parent device might be freed. This could cause UAF.\nProcessing NETDEV_UNREGISTER multiple times also causes inbalance of\nreference count for the module.\n\nThis patch fixes the issue by accepting only first NETDEV_UNREGISTER\nnotification."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: caif: Se corrige el use-after-free en cfusbl_device_notify() syzbot inform\u00f3 el use-after-free en cfusbl_device_notify() [1]. Esto provoca un seguimiento de pila como el siguiente: ERROR: KASAN: use-after-free en cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff88807ac4e6f0 por la tarea kworker/u4:6/1214 CPU: 0 PID: 1214 Comm: kworker/u4:6 No contaminado 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Cola de trabajo: netns cleanup_net Seguimiento de llamadas: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xeb/0x467 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945 call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] netdev_wait_allrefs_any net/core/dev.c:10227 [inline] netdev_run_todo+0xbc0/0x10f0 net/core/dev.c:10341 default_device_exit_batch+0x44e/0x590 net/core/dev.c:11334 ops_exit_list+0x125/0x170 net/core/net_namespace.c:167 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Al anular el registro de un dispositivo de red, unregister_netdevice_many_notify() establece el estado del dispositivo en NETREG_UNREGISTERING, llama a los notificadores con NETDEV_UNREGISTER y a\u00f1ade el dispositivo a la lista de tareas pendientes. Posteriormente, netdev_run_todo() procesa los dispositivos de la lista de tareas pendientes. netdev_run_todo() espera a que el recuento de referencias de los dispositivos llegue a 1 mientras retransmite la notificaci\u00f3n NETDEV_UNREGISTER. Si se llama a cfusbl_device_notify() con NETDEV_UNREGISTER varias veces, el dispositivo principal podr\u00eda liberarse. Esto podr\u00eda causar un UAF. Procesar NETDEV_UNREGISTER varias veces tambi\u00e9n provoca un desequilibrio en el recuento de referencias del m\u00f3dulo. Este parche soluciona el problema aceptando solo la primera notificaci\u00f3n NETDEV_UNREGISTER."}], "id": "CVE-2023-53138", "lastModified": "2025-11-10T17:39:03.013", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-05-02T16:15:32.720", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1793da97a23e31c5bf06631f3f3e5a25f368fd64"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/287027d8a567168a5d8ce5cb0cba16a34791a48c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3f14457e1584224f4296af613bbd99deb60b5d91"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/68a45c3cf0e2242a533657f4f535d9b6a7447a79"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9781e98a97110f5e76999058368b4be76a788484"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9dc16be373b382ddd4c274052a6e870a95e76c01"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c3aaec463a632cf4187dc017e421bfa69d7834a9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d1a11bbdbb5ea9f172019c5a4a3e9d8eabd72179"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net: caif: Fix use-after-free in cfusbl_device_notify()", "id": "2363713", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363713"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: caif: Fix use-after-free in cfusbl_device_notify()\nsyzbot reported use-after-free in cfusbl_device_notify() [1]. This\ncauses a stack trace like below:\nBUG: KASAN: use-after-free in cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138\nRead of size 8 at addr ffff88807ac4e6f0 by task kworker/u4:6/1214\nCPU: 0 PID: 1214 Comm: kworker/u4:6 Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nWorkqueue: netns cleanup_net\nCall Trace:\n<TASK>\n__dump_stack lib/dump_stack.c:88 [inline]\ndump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\nprint_address_description.constprop.0.cold+0xeb/0x467 mm/kasan/report.c:313\nprint_report mm/kasan/report.c:429 [inline]\nkasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491\ncfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138\nnotifier_call_chain+0xb5/0x200 kernel/notifier.c:87\ncall_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945\ncall_netdevice_notifiers_extack net/core/dev.c:1983 [inline]\ncall_netdevice_notifiers net/core/dev.c:1997 [inline]\nnetdev_wait_allrefs_any net/core/dev.c:10227 [inline]\nnetdev_run_todo+0xbc0/0x10f0 net/core/dev.c:10341\ndefault_device_exit_batch+0x44e/0x590 net/core/dev.c:11334\nops_exit_list+0x125/0x170 net/core/net_namespace.c:167\ncleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594\nprocess_one_work+0x996/0x1610 kernel/workqueue.c:2289\nworker_thread+0x665/0x1080 kernel/workqueue.c:2436\nkthread+0x2e9/0x3a0 kernel/kthread.c:376\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302\n</TASK>\nWhen unregistering a net device, unregister_netdevice_many_notify()\nsets the device's reg_state to NETREG_UNREGISTERING, calls notifiers\nwith NETDEV_UNREGISTER, and adds the device to the todo list.\nLater on, devices in the todo list are processed by netdev_run_todo().\nnetdev_run_todo() waits devices' reference count become 1 while\nrebdoadcasting NETDEV_UNREGISTER notification.\nWhen cfusbl_device_notify() is called with NETDEV_UNREGISTER multiple\ntimes, the parent device might be freed. This could cause UAF.\nProcessing NETDEV_UNREGISTER multiple times also causes inbalance of\nreference count for the module.\nThis patch fixes the issue by accepting only first NETDEV_UNREGISTER\nnotification."], "name": "CVE-2023-53138", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53138\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53138\nhttps://lore.kernel.org/linux-cve-announce/2025050237-CVE-2023-53138-0ff0@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-06-23T09:16:29.792127+00:00", "updated": "2025-06-23T09:16:29.792170+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}