{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-49902", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T12:17:06.027Z", "datePublished": "2024-10-21T18:01:33.936Z", "dateUpdated": "2026-08-05T11:40:26.815Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:40:26.815Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: check if leafidx greater than num leaves per dmap tree\n\nsyzbot report a out of bounds in dbSplit, it because dmt_leafidx greater\nthan num leaves per dmap tree, add a checking for dmt_leafidx in dbFindLeaf.\n\nShaggy:\nModified sanity check to apply to control pages as well as leaf pages." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerability is reached by mounting a crafted JFS image (USB media, loop/disk image, automounted removable storage) and then issuing ordinary local filesystem operations such as write/mkdir/setxattr; there is no network-facing path into fs/jfs.\nAC:L - The trigger value `dmt_leafidx` is a plain on-disk field the attacker fully controls, and the path is hit deterministically by any block allocation on the mounted image — no race, no memory-layout dependency, no rare kernel config.\nPR:L - A local unprivileged user suffices in the realistic deployment: on desktops/kiosks/Android-style systems the attacker's removable media is automounted by udisks2/systemd, after which the attacker triggers `dbAlloc()` themselves with ordinary file writes as a normal user.\nUI:N - In the automount scenario no second user has to act — the attacker supplies the medium and then drives block allocation entirely from their own process; the equivalent PR:N/UI:R framing (a privileged user mounts the image) yields the same score.\nS:U - The out-of-bounds access and its consequences are confined to the kernel's own memory and the JFS allocation map; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - `dbSplit()`/`dbBackSplit()`/`dbJoin()` index a page-sized metapage at an attacker-chosen 32-bit byte offset, an unbounded out-of-bounds read of kernel memory whose value observably steers subsequent allocation decisions and thus can be inferred.\nI:H - The corrupted index propagates into the computed block number and the buddy-split updates, corrupting the allocation map and permitting overlapping block allocation; on kernels lacking the later `dbAdjTree()` bound check the same index produces a controlled out-of-bounds write via `tp->dmt_stree[leafno + dmt_leafidx] = newval`.\nA:H - The wild read up to ~4 GB beyond the metapage readily faults on unmapped memory, producing a kernel oops/panic, and the guarded variants hit WARN_ON_ONCE (fatal with panic_on_warn) plus filesystem corruption." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/jfs/jfs_dmap.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d76b9a4c283c7535ae7c7c9b14984e75402951e1", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "35b91f15f44ce3c01eba058ccb864bb04743e792", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "2451e5917c56be45d4add786e2a059dd9c2c37c4", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "25d2a3ff02f22e215ce53355619df10cc5faa7ab", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "058aa89b3318be3d66a103ba7c68d717561e1dc6", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7fff9a9f866e99931cf6fa260288e55d01626582", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "cb0eb10558802764f07de1dc439c4609e27cb4f0", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "4a7bf6a01fb441009a6698179a739957efd88e38", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d64ff0d2306713ff084d4b09f84ed1a8c75ecc32", "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_dmap.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.323", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.285", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.227", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.168", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.113", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.55", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.14", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.3", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12", "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": "4.19.323" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.4.285" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.10.227" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.168" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.113" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.55" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.10.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.11.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d76b9a4c283c7535ae7c7c9b14984e75402951e1" }, { "url": "https://git.kernel.org/stable/c/35b91f15f44ce3c01eba058ccb864bb04743e792" }, { "url": "https://git.kernel.org/stable/c/2451e5917c56be45d4add786e2a059dd9c2c37c4" }, { "url": "https://git.kernel.org/stable/c/25d2a3ff02f22e215ce53355619df10cc5faa7ab" }, { "url": "https://git.kernel.org/stable/c/058aa89b3318be3d66a103ba7c68d717561e1dc6" }, { "url": "https://git.kernel.org/stable/c/7fff9a9f866e99931cf6fa260288e55d01626582" }, { "url": "https://git.kernel.org/stable/c/cb0eb10558802764f07de1dc439c4609e27cb4f0" }, { "url": "https://git.kernel.org/stable/c/4a7bf6a01fb441009a6698179a739957efd88e38" }, { "url": "https://git.kernel.org/stable/c/d64ff0d2306713ff084d4b09f84ed1a8c75ecc32" } ], "title": "jfs: check if leafidx greater than num leaves per dmap tree", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-49902", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-10-22T13:42:45.718739Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-22T13:48:47.475Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:23:04.357Z" } }, { "x_adpType": "supplier", "providerMetadata": { "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-05-12T11:58:59.933Z" }, "affected": [ { "vendor": "Siemens", "product": "RUGGEDCOM RST2428P", "versions": [ { "status": "unaffected", "version": "0", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family", "versions": [ { "status": "unaffected", "version": "0", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SCALANCE XCM-/XRM-/XCH-/XRH-300 family", "versions": [ { "status": "unaffected", "version": "0", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [ { "status": "affected", "version": "0", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "references": [ { "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html" }, { "url": "https://cert-portal.siemens.com/productcert/html/ssa-355557.html" } ] } ] } }