366 lines
18 KiB
JSON
366 lines
18 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2024-49902",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-10-21T12:17:06.027Z",
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"datePublished": "2024-10-21T18:01:33.936Z",
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"dateUpdated": "2026-10-15T00:54:16.093Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:40:26.815Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/jfs/jfs_dmap.c"
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],
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"versions": [
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "d76b9a4c283c7535ae7c7c9b14984e75402951e1",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "35b91f15f44ce3c01eba058ccb864bb04743e792",
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"status": "affected",
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"lessThan": "058aa89b3318be3d66a103ba7c68d717561e1dc6",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"status": "affected",
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"lessThan": "cb0eb10558802764f07de1dc439c4609e27cb4f0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "4a7bf6a01fb441009a6698179a739957efd88e38",
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"status": "affected",
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"versionType": "git"
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{
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"status": "affected",
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/jfs/jfs_dmap.c"
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],
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"versions": [
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{
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"version": "2.6.12",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "2.6.12",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "4.19.323",
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"lessThanOrEqual": "4.19.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.4.285",
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"lessThanOrEqual": "5.4.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.227",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.168",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.113",
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"status": "unaffected",
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},
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{
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"version": "6.11.3",
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"lessThanOrEqual": "6.11.*",
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"status": "unaffected",
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"versionType": "semver"
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{
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"version": "6.12",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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],
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"title": "jfs: check if leafidx greater than num leaves per dmap tree",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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{
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"metrics": [
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{
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"type": "ssvc",
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"content": {
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"id": "CVE-2024-49902",
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"role": "CISA Coordinator",
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"options": [
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{
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2024-10-22T13:42:45.718739Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-10-22T13:48:47.475Z"
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
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"dateUpdated": "2025-11-03T22:23:04.357Z"
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}
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},
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{
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"providerMetadata": {
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"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
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"shortName": "siemens-SADP",
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"dateUpdated": "2026-10-15T00:54:16.093Z"
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},
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"affected": [
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
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"versions": [
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{
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"references": [
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{
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"url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
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},
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{
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"url": "https://cert-portal.siemens.com/productcert/html/ssa-355557.html"
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}
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}
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]
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}
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} |