CVE-2026-43365

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43365", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:56.005Z", "datePublished": "2026-05-08T14:21:18.405Z", "dateUpdated": "2026-10-19T19:16:27.470Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:27:29.220Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix undersized l_iclog_roundoff values\n\nIf the superblock doesn't list a log stripe unit, we set the incore log\nroundoff value to 512. This leads to corrupt logs and unmountable\nfilesystems in generic/617 on a disk with 4k physical sectors...\n\nXFS (sda1): Mounting V5 Filesystem ff3121ca-26e6-4b77-b742-aaff9a449e1c\nXFS (sda1): Torn write (CRC failure) detected at log block 0x318e. Truncating head block from 0x3197.\nXFS (sda1): failed to locate log tail\nXFS (sda1): log mount/recovery failed: error -74\nXFS (sda1): log mount failed\nXFS (sda1): Mounting V5 Filesystem ff3121ca-26e6-4b77-b742-aaff9a449e1c\nXFS (sda1): Ending clean mount\n\n...on the current xfsprogs for-next which has a broken mkfs. xfs_info\nshows this...\n\nmeta-data=/dev/sda1 isize=512 agcount=4, agsize=644992 blks\n = sectsz=4096 attr=2, projid32bit=1\n = crc=1 finobt=1, sparse=1, rmapbt=1\n = reflink=1 bigtime=1 inobtcount=1 nrext64=1\n = exchange=1 metadir=1\ndata = bsize=4096 blocks=2579968, imaxpct=25\n = sunit=0 swidth=0 blks\nnaming =version 2 bsize=4096 ascii-ci=0, ftype=1, parent=1\nlog =internal log bsize=4096 blocks=16384, version=2\n = sectsz=4096 sunit=0 blks, lazy-count=1\nrealtime =none extsz=4096 blocks=0, rtextents=0\n = rgcount=0 rgsize=268435456 extents\n = zoned=0 start=0 reserved=0\n\n...observe that the log section has sectsz=4096 sunit=0, which means\nthat the roundoff factor is 512, not 4096 as you'd expect. We should\nfix mkfs not to generate broken filesystems, but anyone can fuzz the\nondisk superblock so we should be more cautious. I think the inadequate\nlogic predates commit a6a65fef5ef8d0, but that's clearly going to\nrequire a different backport."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H", "baseScore": 8.2, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - Although direct mounting XFS is local/admin-only, the vulnerable XFS log write path is reachable through network-facing services such as nfsd or ksmbd when they export an affected XFS filesystem. A remote client can trigger ordinary create/write/metadata operations that reach XFS transaction logging.\nAC:L - There is no race or fragile memory-layout requirement; once the affected log geometry exists, normal metadata/log traffic reliably uses the undersized roundoff. The attacker only needs to cause filesystem activity that commits XFS transactions.\nPR:N - In the highest reasonable deployment, an anonymous or guest writable network export/upload path backed by XFS lets a remote attacker trigger the path without host privileges. If the export requires credentials this would be PR:L, but the higher-severity reasonable case is unauthenticated write access.\nUI:N - No additional victim action is required after the affected filesystem is mounted/exported. The attacker can trigger log writes by issuing normal remote file operations.\nS:U - The impact remains within the same kernel/filesystem security authority. This is not a VM escape, IOMMU bypass, or cross-scope sandbox escape.\nC:N - The bug corrupts XFS log sizing/alignment and recovery state, but does not expose kernel memory or filesystem contents. I found no read primitive or information disclosure path.\nI:L - The issue can corrupt the XFS journal/on-disk filesystem state, but the corruption is not an attacker-controlled arbitrary write. This supports limited integrity impact rather than full integrity compromise.\nA:H - Corrupt logs can make the filesystem fail log recovery and become unmountable, which is a high availability impact for root, server, or shared storage deployments. The failure can deny access to the affected filesystem and dependent services."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/xfs/xfs_log.c"], "versions": [{"version": "a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48", "lessThan": "5afae524f83d6a18517298491a5624cb0eae5029", "status": "affected", "versionType": "git"}, {"version": "a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48", "lessThan": "2ecda4b83749c1fef0c9dea4fd5e8b513aba3e40", "status": "affected", "versionType": "git"}, {"version": "a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48", "lessThan": "41e91dff2d3974730b5ee50daa8e27ec254cbf91", "status": "affected", "versionType": "git"}, {"version": "a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48", "lessThan": "e88ce9f0536f3b2149afb70625cfc4bd74a4ac6d", "status": "affected", "versionType": "git"}, {"version": "a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48", "lessThan": "446a1f5bb64ba38adb93cb043ff0f7b85e8937ca", "status": "affected", "versionType": "git"}, {"version": "a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48", "lessThan": "5e7148402dfc4a5b7894d8e97b15e5c2e70924aa", "status": "affected", "versionType": "git"}, {"version": "a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48", "lessThan": "52a8a1ba883defbfe3200baa22cf4cd21985d51a", "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/xfs/xfs_log.c"], "versions": [{"version": "5.14", "status": "affected"}, {"version": "0", "lessThan": "5.14", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.78", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.19", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.9", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.6.130"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.12.78"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.18.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.19.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5afae524f83d6a18517298491a5624cb0eae5029"}, {"url": "https://git.kernel.org/stable/c/2ecda4b83749c1fef0c9dea4fd5e8b513aba3e40"}, {"url": "https://git.kernel.org/stable/c/41e91dff2d3974730b5ee50daa8e27ec254cbf91"}, {"url": "https://git.kernel.org/stable/c/e88ce9f0536f3b2149afb70625cfc4bd74a4ac6d"}, {"url": "https://git.kernel.org/stable/c/446a1f5bb64ba38adb93cb043ff0f7b85e8937ca"}, {"url": "https://git.kernel.org/stable/c/5e7148402dfc4a5b7894d8e97b15e5c2e70924aa"}, {"url": "https://git.kernel.org/stable/c/52a8a1ba883defbfe3200baa22cf4cd21985d51a"}], "title": "xfs: fix undersized l_iclog_roundoff values", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-43365", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T15:16:43.929811Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-20", "description": "CWE-20 Improper Input Validation"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T19:16:27.470Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-43365", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T15:16:43.929811Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-20", "description": "CWE-20 Improper Input Validation"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:16:44.651Z"}}], "cna": {"title": "xfs: fix undersized l_iclog_roundoff values", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 8.2, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"}, "scenarios": [{"lang": "en", "value": "AV:N - Although direct mounting XFS is local/admin-only, the vulnerable XFS log write path is reachable through network-facing services such as nfsd or ksmbd when they export an affected XFS filesystem. A remote client can trigger ordinary create/write/metadata operations that reach XFS transaction logging.\nAC:L - There is no race or fragile memory-layout requirement; once the affected log geometry exists, normal metadata/log traffic reliably uses the undersized roundoff. The attacker only needs to cause filesystem activity that commits XFS transactions.\nPR:N - In the highest reasonable deployment, an anonymous or guest writable network export/upload path backed by XFS lets a remote attacker trigger the path without host privileges. If the export requires credentials this would be PR:L, but the higher-severity reasonable case is unauthenticated write access.\nUI:N - No additional victim action is required after the affected filesystem is mounted/exported. The attacker can trigger log writes by issuing normal remote file operations.\nS:U - The impact remains within the same kernel/filesystem security authority. This is not a VM escape, IOMMU bypass, or cross-scope sandbox escape.\nC:N - The bug corrupts XFS log sizing/alignment and recovery state, but does not expose kernel memory or filesystem contents. I found no read primitive or information disclosure path.\nI:L - The issue can corrupt the XFS journal/on-disk filesystem state, but the corruption is not an attacker-controlled arbitrary write. This supports limited integrity impact rather than full integrity compromise.\nA:H - Corrupt logs can make the filesystem fail log recovery and become unmountable, which is a high availability impact for root, server, or shared storage deployments. The failure can deny access to the affected filesystem and dependent services."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48", "lessThan": "5afae524f83d6a18517298491a5624cb0eae5029", "versionType": "git"}, {"status": "affected", "version": "a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48", "lessThan": "2ecda4b83749c1fef0c9dea4fd5e8b513aba3e40", "versionType": "git"}, {"status": "affected", "version": "a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48", "lessThan": "41e91dff2d3974730b5ee50daa8e27ec254cbf91", "versionType": "git"}, {"status": "affected", "version": "a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48", "lessThan": "e88ce9f0536f3b2149afb70625cfc4bd74a4ac6d", "versionType": "git"}, {"status": "affected", "version": "a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48", "lessThan": "446a1f5bb64ba38adb93cb043ff0f7b85e8937ca", "versionType": "git"}, {"status": "affected", "version": "a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48", "lessThan": "5e7148402dfc4a5b7894d8e97b15e5c2e70924aa", "versionType": "git"}, {"status": "affected", "version": "a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48", "lessThan": "52a8a1ba883defbfe3200baa22cf4cd21985d51a", "versionType": "git"}], "programFiles": ["fs/xfs/xfs_log.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": "5.15.203", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.167", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.130", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.78", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.19", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.9", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/xfs/xfs_log.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/5afae524f83d6a18517298491a5624cb0eae5029"}, {"url": "https://git.kernel.org/stable/c/2ecda4b83749c1fef0c9dea4fd5e8b513aba3e40"}, {"url": "https://git.kernel.org/stable/c/41e91dff2d3974730b5ee50daa8e27ec254cbf91"}, {"url": "https://git.kernel.org/stable/c/e88ce9f0536f3b2149afb70625cfc4bd74a4ac6d"}, {"url": "https://git.kernel.org/stable/c/446a1f5bb64ba38adb93cb043ff0f7b85e8937ca"}, {"url": "https://git.kernel.org/stable/c/5e7148402dfc4a5b7894d8e97b15e5c2e70924aa"}, {"url": "https://git.kernel.org/stable/c/52a8a1ba883defbfe3200baa22cf4cd21985d51a"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix undersized l_iclog_roundoff values\n\nIf the superblock doesn't list a log stripe unit, we set the incore log\nroundoff value to 512. This leads to corrupt logs and unmountable\nfilesystems in generic/617 on a disk with 4k physical sectors...\n\nXFS (sda1): Mounting V5 Filesystem ff3121ca-26e6-4b77-b742-aaff9a449e1c\nXFS (sda1): Torn write (CRC failure) detected at log block 0x318e. Truncating head block from 0x3197.\nXFS (sda1): failed to locate log tail\nXFS (sda1): log mount/recovery failed: error -74\nXFS (sda1): log mount failed\nXFS (sda1): Mounting V5 Filesystem ff3121ca-26e6-4b77-b742-aaff9a449e1c\nXFS (sda1): Ending clean mount\n\n...on the current xfsprogs for-next which has a broken mkfs. xfs_info\nshows this...\n\nmeta-data=/dev/sda1 isize=512 agcount=4, agsize=644992 blks\n = sectsz=4096 attr=2, projid32bit=1\n = crc=1 finobt=1, sparse=1, rmapbt=1\n = reflink=1 bigtime=1 inobtcount=1 nrext64=1\n = exchange=1 metadir=1\ndata = bsize=4096 blocks=2579968, imaxpct=25\n = sunit=0 swidth=0 blks\nnaming =version 2 bsize=4096 ascii-ci=0, ftype=1, parent=1\nlog =internal log bsize=4096 blocks=16384, version=2\n = sectsz=4096 sunit=0 blks, lazy-count=1\nrealtime =none extsz=4096 blocks=0, rtextents=0\n = rgcount=0 rgsize=268435456 extents\n = zoned=0 start=0 reserved=0\n\n...observe that the log section has sectsz=4096 sunit=0, which means\nthat the roundoff factor is 512, not 4096 as you'd expect. We should\nfix mkfs not to generate broken filesystems, but anyone can fuzz the\nondisk superblock so we should be more cautious. I think the inadequate\nlogic predates commit a6a65fef5ef8d0, but that's clearly going to\nrequire a different backport."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.203", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.167", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.130", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.78", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.19", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.19.9", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0", "versionStartIncluding": "5.14"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:27:29.220Z"}}}, "cveMetadata": {"cveId": "CVE-2026-43365", "state": "PUBLISHED", "dateUpdated": "2026-10-19T19:16:27.470Z", "dateReserved": "2026-05-01T14:12:56.005Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-05-08T14:21:18.405Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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This leads to corrupt logs and unmountable\nfilesystems in generic/617 on a disk with 4k physical sectors...\n\nXFS (sda1): Mounting V5 Filesystem ff3121ca-26e6-4b77-b742-aaff9a449e1c\nXFS (sda1): Torn write (CRC failure) detected at log block 0x318e. Truncating head block from 0x3197.\nXFS (sda1): failed to locate log tail\nXFS (sda1): log mount/recovery failed: error -74\nXFS (sda1): log mount failed\nXFS (sda1): Mounting V5 Filesystem ff3121ca-26e6-4b77-b742-aaff9a449e1c\nXFS (sda1): Ending clean mount\n\n...on the current xfsprogs for-next which has a broken mkfs. xfs_info\nshows this...\n\nmeta-data=/dev/sda1 isize=512 agcount=4, agsize=644992 blks\n = sectsz=4096 attr=2, projid32bit=1\n = crc=1 finobt=1, sparse=1, rmapbt=1\n = reflink=1 bigtime=1 inobtcount=1 nrext64=1\n = exchange=1 metadir=1\ndata = bsize=4096 blocks=2579968, imaxpct=25\n = sunit=0 swidth=0 blks\nnaming =version 2 bsize=4096 ascii-ci=0, ftype=1, parent=1\nlog =internal log bsize=4096 blocks=16384, version=2\n = sectsz=4096 sunit=0 blks, lazy-count=1\nrealtime =none extsz=4096 blocks=0, rtextents=0\n = rgcount=0 rgsize=268435456 extents\n = zoned=0 start=0 reserved=0\n\n...observe that the log section has sectsz=4096 sunit=0, which means\nthat the roundoff factor is 512, not 4096 as you'd expect. We should\nfix mkfs not to generate broken filesystems, but anyone can fuzz the\nondisk superblock so we should be more cautious. I think the inadequate\nlogic predates commit a6a65fef5ef8d0, but that's clearly going to\nrequire a different backport."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nxfs: soluci\u00f3n para valores l_iclog_roundoff de tama\u00f1o insuficiente\n\nSi el superbloque no lista una unidad de franja de registro, establecemos el valor de redondeo del registro en memoria a 512. Esto lleva a registros corruptos y sistemas de archivos no montables en generic/617 en un disco con sectores f\u00edsicos de 4k...\n\nXFS (sda1): Montando sistema de archivos V5 ff3121ca-26e6-4b77-b742-aaff9a449e1c\nXFS (sda1): Escritura dividida (fallo de CRC) detectada en el bloque de registro 0x 318e. Truncando el bloque de cabecera desde 0x 3197.\nXFS (sda1): fall\u00f3 al localizar la cola del registro\nXFS (sda1): montaje/recuperaci\u00f3n del registro fall\u00f3: error -74\nXFS (sda1): montaje del registro fall\u00f3\nXFS (sda1): Montando sistema de archivos V5 ff3121ca-26e6-4b77-b742-aaff9a449e1c\nXFS (sda1): Finalizando montaje limpio\n\n...en el actual xfsprogs for-next que tiene un mkfs roto. xfs_info muestra esto...\n\nmeta-data=/dev/sda1 isize=512 agcount=4, agsize=644992 blks\n = sectsz=4096 attr=2, projid32bit=1\n = crc=1 finobt=1, sparse=1, rmapbt=1\n = reflink=1 bigtime=1 inobtcount=1 nrext64=1\n = exchange=1 metadir=1\ndata = bsize=4096 blocks=2579968, imaxpct=25\n = sunit=0 swidth=0 blks\nnaming =version 2 bsize=4096 ascii-ci=0, ftype=1, parent=1\nlog =internal log bsize=4096 blocks=16384, version=2\n = sectsz=4096 sunit=0 blks, lazy-count=1\nrealtime =none extsz=4096 blocks=0, rtextents=0\n = rgcount=0 rgsize=268435456 extents\n = zoned=0 start=0 reserved=0\n\n...observe que la secci\u00f3n de registro tiene sectsz=4096 sunit=0, lo que significa que el factor de redondeo es 512, no 4096 como se esperar\u00eda. Deber\u00edamos arreglar mkfs para no generar sistemas de archivos rotos, pero cualquiera puede fuzzear el superbloque en disco, as\u00ed que deber\u00edamos ser m\u00e1s cautelosos. Creo que la l\u00f3gica inadecuada es anterior al commit a6a65fef5ef8d0, pero eso claramente requerir\u00e1 un backport diferente."}], "id": "CVE-2026-43365", "lastModified": "2026-11-11T20:10:00.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43365", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:16:43.929811Z", "version": "2.0.3"}}]}, "published": "2026-05-08T15:16:47.490", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2ecda4b83749c1fef0c9dea4fd5e8b513aba3e40"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/41e91dff2d3974730b5ee50daa8e27ec254cbf91"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/446a1f5bb64ba38adb93cb043ff0f7b85e8937ca"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/52a8a1ba883defbfe3200baa22cf4cd21985d51a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5afae524f83d6a18517298491a5624cb0eae5029"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5e7148402dfc4a5b7894d8e97b15e5c2e70924aa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e88ce9f0536f3b2149afb70625cfc4bd74a4ac6d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-20"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: xfs: fix undersized l_iclog_roundoff values", "id": "2468178", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468178"}, "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"}, "cwe": "CWE-166", "details": ["A flaw was found in the Linux kernel's XFS filesystem. This vulnerability arises when the filesystem superblock, which contains critical metadata, does not correctly specify a log stripe unit. This can lead to undersized log roundoff values, causing log corruption. A local attacker could potentially exploit this by manipulating the on-disk superblock, resulting in unmountable filesystems and a Denial of Service (DoS)."], "name": "CVE-2026-43365", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "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": "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": "2026-05-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43365\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43365\nhttps://lore.kernel.org/linux-cve-announce/2026050827-CVE-2026-43365-b7ce@gregkh/T"], "threat_severity": "Moderate"}

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