{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-49068", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.244Z", "datePublished": "2025-02-26T01:54:35.340Z", "dateUpdated": "2026-05-23T15:21:30.120Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:21:30.120Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: release correct delalloc amount in direct IO write path\n\nRunning generic/406 causes the following WARNING in btrfs_destroy_inode()\nwhich tells there are outstanding extents left.\n\nIn btrfs_get_blocks_direct_write(), we reserve a temporary outstanding\nextents with btrfs_delalloc_reserve_metadata() (or indirectly from\nbtrfs_delalloc_reserve_space(()). We then release the outstanding extents\nwith btrfs_delalloc_release_extents(). However, the \"len\" can be modified\nin the COW case, which releases fewer outstanding extents than expected.\n\nFix it by calling btrfs_delalloc_release_extents() for the original length.\n\nTo reproduce the warning, the filesystem should be 1 GiB. It's\ntriggering a short-write, due to not being able to allocate a large\nextent and instead allocating a smaller one.\n\n WARNING: CPU: 0 PID: 757 at fs/btrfs/inode.c:8848 btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n Modules linked in: btrfs blake2b_generic xor lzo_compress\n lzo_decompress raid6_pq zstd zstd_decompress zstd_compress xxhash zram\n zsmalloc\n CPU: 0 PID: 757 Comm: umount Not tainted 5.17.0-rc8+ #101\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS d55cb5a 04/01/2014\n RIP: 0010:btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n RSP: 0018:ffffc9000327bda8 EFLAGS: 00010206\n RAX: 0000000000000000 RBX: ffff888100548b78 RCX: 0000000000000000\n RDX: 0000000000026900 RSI: 0000000000000000 RDI: ffff888100548b78\n RBP: ffff888100548940 R08: 0000000000000000 R09: ffff88810b48aba8\n R10: 0000000000000001 R11: ffff8881004eb240 R12: ffff88810b48a800\n R13: ffff88810b48ec08 R14: ffff88810b48ed00 R15: ffff888100490c68\n FS: 00007f8549ea0b80(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007f854a09e733 CR3: 000000010a2e9003 CR4: 0000000000370eb0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n <TASK>\n destroy_inode+0x33/0x70\n dispose_list+0x43/0x60\n evict_inodes+0x161/0x1b0\n generic_shutdown_super+0x2d/0x110\n kill_anon_super+0xf/0x20\n btrfs_kill_super+0xd/0x20 [btrfs]\n deactivate_locked_super+0x27/0x90\n cleanup_mnt+0x12c/0x180\n task_work_run+0x54/0x80\n exit_to_user_mode_prepare+0x152/0x160\n syscall_exit_to_user_mode+0x12/0x30\n do_syscall_64+0x42/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n RIP: 0033:0x7f854a000fb7"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/inode.c"], "versions": [{"version": "5afd80c393f4e87451f14eefb7f2f24daf434e06", "lessThan": "07cacfd9d9dc134557ac8866c73d570a59b3d1f3", "status": "affected", "versionType": "git"}, {"version": "f0bfa76a11e93d0fe2c896fcb566568c5e8b5d3f", "lessThan": "a04d37ddfe4be431b9e52e8504490376ab0a39a4", "status": "affected", "versionType": "git"}, {"version": "f0bfa76a11e93d0fe2c896fcb566568c5e8b5d3f", "lessThan": "6d82ad13c4110e73c7b0392f00534a1502a1b520", "status": "affected", "versionType": "git"}, {"version": "96f1be29492d9e2fb97bb27f824478ab8cd3ab86", "status": "affected", "versionType": "git"}, {"version": "5.15.27", "lessThan": "5.15.35", "status": "affected", "versionType": "semver"}, {"version": "5.16.13", "lessThan": "5.17", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/inode.c"], "versions": [{"version": "5.17", "status": "affected"}, {"version": "0", "lessThan": "5.17", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.35", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.17.4", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18", "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": "5.15.27", "versionEndExcluding": "5.15.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "5.17.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "5.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/07cacfd9d9dc134557ac8866c73d570a59b3d1f3"}, {"url": "https://git.kernel.org/stable/c/a04d37ddfe4be431b9e52e8504490376ab0a39a4"}, {"url": "https://git.kernel.org/stable/c/6d82ad13c4110e73c7b0392f00534a1502a1b520"}], "title": "btrfs: release correct delalloc amount in direct IO write path", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4960A935-FD5B-4178-93FD-54F8B8F87E05", "versionEndExcluding": "5.15.35", "versionStartIncluding": "5.15.27", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "38DDBA33-1800-441A-9B01-A0A816DFB0C4", "versionEndExcluding": "5.17.4", "versionStartIncluding": "5.16.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc1:*:*:*:*:*:*", "matchCriteriaId": "6AD94161-84BB-42E6-9882-4FC0C42E9FC1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc2:*:*:*:*:*:*", "matchCriteriaId": "7AB06DDF-3C2B-416D-B448-E990D8FF67A9", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: release correct delalloc amount in direct IO write path\n\nRunning generic/406 causes the following WARNING in btrfs_destroy_inode()\nwhich tells there are outstanding extents left.\n\nIn btrfs_get_blocks_direct_write(), we reserve a temporary outstanding\nextents with btrfs_delalloc_reserve_metadata() (or indirectly from\nbtrfs_delalloc_reserve_space(()). We then release the outstanding extents\nwith btrfs_delalloc_release_extents(). However, the \"len\" can be modified\nin the COW case, which releases fewer outstanding extents than expected.\n\nFix it by calling btrfs_delalloc_release_extents() for the original length.\n\nTo reproduce the warning, the filesystem should be 1 GiB. It's\ntriggering a short-write, due to not being able to allocate a large\nextent and instead allocating a smaller one.\n\n WARNING: CPU: 0 PID: 757 at fs/btrfs/inode.c:8848 btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n Modules linked in: btrfs blake2b_generic xor lzo_compress\n lzo_decompress raid6_pq zstd zstd_decompress zstd_compress xxhash zram\n zsmalloc\n CPU: 0 PID: 757 Comm: umount Not tainted 5.17.0-rc8+ #101\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS d55cb5a 04/01/2014\n RIP: 0010:btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n RSP: 0018:ffffc9000327bda8 EFLAGS: 00010206\n RAX: 0000000000000000 RBX: ffff888100548b78 RCX: 0000000000000000\n RDX: 0000000000026900 RSI: 0000000000000000 RDI: ffff888100548b78\n RBP: ffff888100548940 R08: 0000000000000000 R09: ffff88810b48aba8\n R10: 0000000000000001 R11: ffff8881004eb240 R12: ffff88810b48a800\n R13: ffff88810b48ec08 R14: ffff88810b48ed00 R15: ffff888100490c68\n FS: 00007f8549ea0b80(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007f854a09e733 CR3: 000000010a2e9003 CR4: 0000000000370eb0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n <TASK>\n destroy_inode+0x33/0x70\n dispose_list+0x43/0x60\n evict_inodes+0x161/0x1b0\n generic_shutdown_super+0x2d/0x110\n kill_anon_super+0xf/0x20\n btrfs_kill_super+0xd/0x20 [btrfs]\n deactivate_locked_super+0x27/0x90\n cleanup_mnt+0x12c/0x180\n task_work_run+0x54/0x80\n exit_to_user_mode_prepare+0x152/0x160\n syscall_exit_to_user_mode+0x12/0x30\n do_syscall_64+0x42/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n RIP: 0033:0x7f854a000fb7"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: libera la cantidad correcta de delalloc en la ruta de escritura de E/S directa. La ejecuci\u00f3n de generic/406 provoca la siguiente ADVERTENCIA en btrfs_destroy_inode() que indica que quedan extensiones pendientes. En btrfs_get_blocks_direct_write(), reservamos extensiones pendientes temporalmente con btrfs_delalloc_reserve_metadata() (o indirectamente desde btrfs_delalloc_reserve_space()). Luego, liberamos las extensiones pendientes con btrfs_delalloc_release_extents(). Sin embargo, la \"longitud\" se puede modificar en el caso de COW, que libera menos extensiones pendientes de lo esperado. Arr\u00e9glelo llamando a btrfs_delalloc_release_extents() para la longitud original. Para reproducir la advertencia, el sistema de archivos debe ser de 1 GiB. Est\u00e1 activando una escritura corta, debido a que no se puede asignar una extensi\u00f3n grande y, en su lugar, se asigna una m\u00e1s peque\u00f1a. ADVERTENCIA: CPU: 0 PID: 757 en fs/btrfs/inode.c:8848 btrfs_destroy_inode+0x1e6/0x210 [btrfs] M\u00f3dulos vinculados en: btrfs blake2b_generic xor lzo_compress lzo_decompress raid6_pq zstd zstd_decompress zstd_compress xxhash zram zsmalloc CPU: 0 PID: 757 Comm: umount No contaminado 5.17.0-rc8+ #101 Nombre del hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS d55cb5a 01/04/2014 RIP: 0010:btrfs_destroy_inode+0x1e6/0x210 [btrfs] RSP: 0018:ffffc9000327bda8 EFLAGS: 00010206 RAX: 000000000000000 RBX: ffff888100548b78 RCX: 0000000000000000 RDX: 0000000000026900 RSI: 0000000000000000 RDI: ffff888100548b78 RBP: ffff888100548940 R08: 0000000000000000 R09: ffff88810b48aba8 R10: 0000000000000001 R11: ffff8881004eb240 R12: ffff88810b48a800 R13: ffff88810b48ec08 R14: ffff88810b48ed00 R15: ffff888100490c68 FS: 00007f8549ea0b80(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f854a09e733 CR3: 000000010a2e9003 CR4: 0000000000370eb0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 00000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Seguimiento de llamadas: destroy_inode+0x33/0x70 dispose_list+0x43/0x60 evict_inodes+0x161/0x1b0 generic_shutdown_super+0x2d/0x110 kill_anon_super+0xf/0x20 btrfs_kill_super+0xd/0x20 [btrfs] deactivate_locked_super+0x27/0x90 cleanup_mnt+0x12c/0x180 task_work_run+0x54/0x80 exit_to_user_mode_prepare+0x152/0x160 syscall_exit_to_user_mode+0x12/0x30 do_syscall_64+0x42/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f854a000fb7"}], "id": "CVE-2022-49068", "lastModified": "2025-10-14T18:37:45.793", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-02-26T07:00:44.027", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/07cacfd9d9dc134557ac8866c73d570a59b3d1f3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6d82ad13c4110e73c7b0392f00534a1502a1b520"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a04d37ddfe4be431b9e52e8504490376ab0a39a4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: btrfs: release correct delalloc amount in direct IO write path", "id": "2347888", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2347888"}, "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:\nbtrfs: release correct delalloc amount in direct IO write path\nRunning generic/406 causes the following WARNING in btrfs_destroy_inode()\nwhich tells there are outstanding extents left.\nIn btrfs_get_blocks_direct_write(), we reserve a temporary outstanding\nextents with btrfs_delalloc_reserve_metadata() (or indirectly from\nbtrfs_delalloc_reserve_space(()). We then release the outstanding extents\nwith btrfs_delalloc_release_extents(). However, the \"len\" can be modified\nin the COW case, which releases fewer outstanding extents than expected.\nFix it by calling btrfs_delalloc_release_extents() for the original length.\nTo reproduce the warning, the filesystem should be 1 GiB. It's\ntriggering a short-write, due to not being able to allocate a large\nextent and instead allocating a smaller one.\nWARNING: CPU: 0 PID: 757 at fs/btrfs/inode.c:8848 btrfs_destroy_inode+0x1e6/0x210 [btrfs]\nModules linked in: btrfs blake2b_generic xor lzo_compress\nlzo_decompress raid6_pq zstd zstd_decompress zstd_compress xxhash zram\nzsmalloc\nCPU: 0 PID: 757 Comm: umount Not tainted 5.17.0-rc8+ #101\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS d55cb5a 04/01/2014\nRIP: 0010:btrfs_destroy_inode+0x1e6/0x210 [btrfs]\nRSP: 0018:ffffc9000327bda8 EFLAGS: 00010206\nRAX: 0000000000000000 RBX: ffff888100548b78 RCX: 0000000000000000\nRDX: 0000000000026900 RSI: 0000000000000000 RDI: ffff888100548b78\nRBP: ffff888100548940 R08: 0000000000000000 R09: ffff88810b48aba8\nR10: 0000000000000001 R11: ffff8881004eb240 R12: ffff88810b48a800\nR13: ffff88810b48ec08 R14: ffff88810b48ed00 R15: ffff888100490c68\nFS: 00007f8549ea0b80(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f854a09e733 CR3: 000000010a2e9003 CR4: 0000000000370eb0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n<TASK>\ndestroy_inode+0x33/0x70\ndispose_list+0x43/0x60\nevict_inodes+0x161/0x1b0\ngeneric_shutdown_super+0x2d/0x110\nkill_anon_super+0xf/0x20\nbtrfs_kill_super+0xd/0x20 [btrfs]\ndeactivate_locked_super+0x27/0x90\ncleanup_mnt+0x12c/0x180\ntask_work_run+0x54/0x80\nexit_to_user_mode_prepare+0x152/0x160\nsyscall_exit_to_user_mode+0x12/0x30\ndo_syscall_64+0x42/0x80\nentry_SYSCALL_64_after_hwframe+0x44/0xae\nRIP: 0033:0x7f854a000fb7"], "name": "CVE-2022-49068", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "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": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49068\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49068\nhttps://lore.kernel.org/linux-cve-announce/2025022654-CVE-2022-49068-aa1b@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-12T22:31:47.123819+00:00", "updated": "2025-07-12T22:31:47.123878+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}