CVE-2026-89834

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89834", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.769Z", "datePublished": "2026-09-16T10:31:07.093Z", "dateUpdated": "2026-10-30T12:33:13.082Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:33:13.082Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to migrate all curseg types during free_segment_range\n\nIn free_segment_range(), the curseg evacuation loop only iterates up to\nNR_CURSEG_PERSIST_TYPE (0..5), missing non-persistent in-memory curseg\ntypes such as CURSEG_COLD_DATA_PINNED and CURSEG_ALL_DATA_ATGC.\n\nEven though these in-memory curseg types are not saved in the on-disk\ncheckpoint header, they still occupy active physical segments at runtime.\nIf an active in-memory curseg happens to be allocated within the segment\nrange being truncated during filesystem shrink, failing to evacuate it\nwill cause subsequent writes to the curseg attempting out-of-bounds I/O\non the truncated storage range.\n\nFix this by expanding the curseg evacuation loop upper bound to\nNR_CURSEG_TYPE to ensure all active curseg types are safely migrated\nout of the target range."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/gc.c"], "versions": [{"version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d", "lessThan": "7ffac0deea2d84cf79051f16fed8e215c4bcf0e6", "status": "affected", "versionType": "git"}, {"version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d", "lessThan": "d358d2fc6be11eefde5eb1286f1c43a6d0330db6", "status": "affected", "versionType": "git"}, {"version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d", "lessThan": "3b85edf3391f3e1f624f409a7d2d239885f567b7", "status": "affected", "versionType": "git"}, {"version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d", "lessThan": "b8ae1228c153622afa71a179c9d4dc268117e0f0", "status": "affected", "versionType": "git"}, {"version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d", "lessThan": "b9776094aa7118e8e5dfdcd791ffc8330c5ca408", "status": "affected", "versionType": "git"}, {"version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d", "lessThan": "8ec06f50ddd8d201bd7e55b896ae28ed9d4cb7d1", "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/f2fs/gc.c"], "versions": [{"version": "5.10", "status": "affected"}, {"version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "5.10", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/7ffac0deea2d84cf79051f16fed8e215c4bcf0e6"}, {"url": "https://git.kernel.org/stable/c/d358d2fc6be11eefde5eb1286f1c43a6d0330db6"}, {"url": "https://git.kernel.org/stable/c/3b85edf3391f3e1f624f409a7d2d239885f567b7"}, {"url": "https://git.kernel.org/stable/c/b8ae1228c153622afa71a179c9d4dc268117e0f0"}, {"url": "https://git.kernel.org/stable/c/b9776094aa7118e8e5dfdcd791ffc8330c5ca408"}, {"url": "https://git.kernel.org/stable/c/8ec06f50ddd8d201bd7e55b896ae28ed9d4cb7d1"}], "title": "f2fs: fix to migrate all curseg types during free_segment_range", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/f2fs/gc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "7ffac0deea2d84cf79051f16fed8e215c4bcf0e6", "status": "affected", "version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d", "versionType": "git"}, {"lessThan": "d358d2fc6be11eefde5eb1286f1c43a6d0330db6", "status": "affected", "version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d", "versionType": "git"}, {"lessThan": "3b85edf3391f3e1f624f409a7d2d239885f567b7", "status": "affected", "version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d", "versionType": "git"}, {"lessThan": "b8ae1228c153622afa71a179c9d4dc268117e0f0", "status": "affected", "version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d", "versionType": "git"}, {"lessThan": "b9776094aa7118e8e5dfdcd791ffc8330c5ca408", "status": "affected", "version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d", "versionType": "git"}, {"lessThan": "8ec06f50ddd8d201bd7e55b896ae28ed9d4cb7d1", "status": "affected", "version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/f2fs/gc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.10"}, {"lessThan": "5.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to migrate all curseg types during free_segment_range\n\nIn free_segment_range(), the curseg evacuation loop only iterates up to\nNR_CURSEG_PERSIST_TYPE (0..5), missing non-persistent in-memory curseg\ntypes such as CURSEG_COLD_DATA_PINNED and CURSEG_ALL_DATA_ATGC.\n\nEven though these in-memory curseg types are not saved in the on-disk\ncheckpoint header, they still occupy active physical segments at runtime.\nIf an active in-memory curseg happens to be allocated within the segment\nrange being truncated during filesystem shrink, failing to evacuate it\nwill cause subsequent writes to the curseg attempting out-of-bounds I/O\non the truncated storage range.\n\nFix this by expanding the curseg evacuation loop upper bound to\nNR_CURSEG_TYPE to ensure all active curseg types are safely migrated\nout of the target range."}], "id": "CVE-2026-89834", "lastModified": "2026-10-30T13:20:30.617", "metrics": {}, "published": "2026-09-16T11:16:50.180", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3b85edf3391f3e1f624f409a7d2d239885f567b7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7ffac0deea2d84cf79051f16fed8e215c4bcf0e6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8ec06f50ddd8d201bd7e55b896ae28ed9d4cb7d1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b8ae1228c153622afa71a179c9d4dc268117e0f0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b9776094aa7118e8e5dfdcd791ffc8330c5ca408"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d358d2fc6be11eefde5eb1286f1c43a6d0330db6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d0b9e42ab6155dc05fc83f00af9f45d4dd02264d,3b85edf3391f3e1f624f409a7d2d239885f567b7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d0b9e42ab6155dc05fc83f00af9f45d4dd02264d,b8ae1228c153622afa71a179c9d4dc268117e0f0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d0b9e42ab6155dc05fc83f00af9f45d4dd02264d,b9776094aa7118e8e5dfdcd791ffc8330c5ca408)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d0b9e42ab6155dc05fc83f00af9f45d4dd02264d,8ec06f50ddd8d201bd7e55b896ae28ed9d4cb7d1)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.10"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.10)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.51,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.5,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-18T09:00:08.371253+00:00", "updated": "2026-09-18T09:45:06.365079+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-787", "CWE-119"]}