{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-56596", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-27T14:03:06.010Z", "datePublished": "2024-12-27T14:51:03.282Z", "dateUpdated": "2026-08-05T11:45:15.252Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:45:15.252Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: fix array-index-out-of-bounds in jfs_readdir\n\nThe stbl might contain some invalid values. Added a check to\nreturn error code in that case." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is triggered by a local `getdents64()`/readdir on a directory of a mounted JFS filesystem whose dtree page contains a negative `stbl[]` entry; there is no network-facing path into `jfs_readdir()`. Delivery of the crafted image is via local/removable media, so the vector is Local.\nAC:L - The attacker fully controls the on-disk image and can deterministically set `stbl[i]` to a negative value; no race, no memory-layout guess, and no condition outside attacker control is involved. Any directory listing of the crafted directory reliably triggers the out-of-bounds access.\nPR:N - The attacker needs no privileges or account on the target system — they only supply a malicious JFS image (e.g. USB media), and the subsequent `readdir` requires nothing beyond ordinary directory read permission. JFS is `FS_REQUIRES_DEV` without `FS_USERNS_MOUNT`, so mounting is done by the victim/automounter rather than by the attacker.\nUI:R - The crafted filesystem must be mounted by a user or automounter (udisks/desktop automount on kiosks and workstations) before the directory can be read. That mount action is the required user interaction.\nS:U - The out-of-bounds read and write stay within the kernel's own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Up to 4 KB of kernel memory preceding the dtree metapage or the `jfs_inode_info` slab object is read and then emitted to userspace as directory entry names and inode numbers via `dir_emit()`, giving a directly harvestable disclosure of adjacent heap contents including potential pointers and secrets.\nI:H - The same unvalidated negative index flows into `add_missing_indices()`, which performs `d->index = cpu_to_le32(add_index(...))` — a 4-byte out-of-bounds write at attacker-chosen negative offset — and stores the bad offset into the transaction linelock, corrupting adjacent kernel objects and journal metadata.\nA:H - Reading and writing up to 4 KB outside the metapage/slab object readily hits unmapped or poisoned memory, producing the KASAN-reported oops/panic seen by syzbot, and the stray write corrupts filesystem and journal state." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/jfs/jfs_dtree.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b62f41aeec9d250144c53875b507c1d45ae8c8fc", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "97e693593162eef6851d232f0c8148169ed46a5c", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9efe72eefd4c4a7ce63b3e4d667d766d2b360cb4", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ff9fc48fab0e1ea0d423c23c99b91bba178f0b05", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e7d376f94f72b020f84e77278b150ec1cc27502c", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "8ff7579554571d92e3deab168f5a7d7b146ed368", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "839f102efb168f02dfdd46717b7c6dddb26b015e", "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/jfs/jfs_dtree.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.287", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.231", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.174", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.120", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.66", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.5", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13", "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": "2.6.12", "versionEndExcluding": "5.4.287" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.10.231" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.174" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.66" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b62f41aeec9d250144c53875b507c1d45ae8c8fc" }, { "url": "https://git.kernel.org/stable/c/97e693593162eef6851d232f0c8148169ed46a5c" }, { "url": "https://git.kernel.org/stable/c/9efe72eefd4c4a7ce63b3e4d667d766d2b360cb4" }, { "url": "https://git.kernel.org/stable/c/ff9fc48fab0e1ea0d423c23c99b91bba178f0b05" }, { "url": "https://git.kernel.org/stable/c/e7d376f94f72b020f84e77278b150ec1cc27502c" }, { "url": "https://git.kernel.org/stable/c/8ff7579554571d92e3deab168f5a7d7b146ed368" }, { "url": "https://git.kernel.org/stable/c/839f102efb168f02dfdd46717b7c6dddb26b015e" } ], "title": "jfs: fix array-index-out-of-bounds in jfs_readdir", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-56596", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-10-01T20:01:31.920173Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-129", "description": "CWE-129 Improper Validation of Array Index" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:07:14.017Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:50:27.430Z" } } ] } }