{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-56598","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-12-27T14:03:06.010Z","datePublished":"2024-12-27T14:51:04.988Z","dateUpdated":"2026-08-05T11:45:19.362Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T11:45:19.362Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\njfs: array-index-out-of-bounds fix in dtReadFirst\n\nThe value of stbl can be sometimes out of bounds due\nto a bad filesystem. Added a check with appopriate return\nof 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:N/A:H","baseScore":7.1,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The malicious data is on-disk JFS directory-btree metadata consumed locally via `mount(2)` followed by `getdents(2)` on the crafted directory; no network- or peer-supplied data reaches `dtReadFirst()`. The image is delivered as removable media, a loop-mountable file, or a container/appliance disk blob.\nAC:L - The attacker sets `stbl[0]` to any negative value directly in the on-disk image, so the out-of-bounds index and its exact -32..-4096 byte offset are fully attacker-chosen and fire deterministically on the first `readdir()` of the crafted directory. There is no race, timing window, or memory-layout condition outside the attacker's influence.\nPR:N - The attacker needs no account or privilege on the target system — they only author the crafted JFS image, and the privileged mount is performed by the victim or by automounting tooling. This matches the established scoring for crafted-filesystem-image CVEs in this subsystem.\nUI:R - JFS is `FS_REQUIRES_DEV` without `FS_USERNS_MOUNT`, so the attacker cannot mount the image themselves; a victim (root, udisks/automounter, or image-processing automation) must mount it and then list the directory, though a single `ls` is enough once mounted.\nS:U - The out-of-bounds read and any resulting fault stay inside the kernel of the same host; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - The attacker selects any 8-byte window across a 4 KB region preceding the dtree page — for the root case that is inside `struct jfs_inode_info` and neighbouring slab objects, exposing kernel pointers such as `ipimap` and `anon_inode_list` — so the read is far from \"strictly bounded to a few bytes.\" The leaked bytes become `bn`/`psize` and select which attacker-authored disk block is fetched and listed, giving an observable oracle that exfiltrates the disclosed kernel memory through `readdir()` output.\nI:N - `xd` is only dereferenced for reading in `dtReadFirst()`; the out-of-bounds access performs no kernel memory write and yields no corruption or control-flow primitive. The only writes it can steer (`add_missing_indices()`) land on blocks of the attacker's own crafted block device, not on victim-owned kernel or system state.\nA:H - This is the syzbot-reported UBSAN array-index-out-of-bounds; on `CONFIG_UBSAN_BOUNDS` + `CONFIG_UBSAN_TRAP` builds (Android GKI and hardened kernels) the check traps into a kernel panic, and on KASAN/`panic_on_warn` configurations the slab-out-of-bounds report is fatal. The garbage `bn`/`psize` additionally drives `jfs_error()` paths that panic under `errors=panic`, and the trigger is repeatable on every `readdir()` of the crafted directory."}]}],"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":"25f1e673ef61d6bf9a6022e27936785896d74948","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"8c97a4d5463a1c972ef576ac499ea9b05f956097","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"823d573f5450ca6be80b36f54d1902ac7cd23fb9","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"2eea5fda5556ef03defebf07b0a12fcd2c5210f4","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"fd993b2180b4c373af8b99aa28d4dcda5c2a8f10","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"22dcbf7661c6ffc3247978c254dc40b833a0d429","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"ca84a2c9be482836b86d780244f0357e5a778c46","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/25f1e673ef61d6bf9a6022e27936785896d74948"},{"url":"https://git.kernel.org/stable/c/8c97a4d5463a1c972ef576ac499ea9b05f956097"},{"url":"https://git.kernel.org/stable/c/823d573f5450ca6be80b36f54d1902ac7cd23fb9"},{"url":"https://git.kernel.org/stable/c/2eea5fda5556ef03defebf07b0a12fcd2c5210f4"},{"url":"https://git.kernel.org/stable/c/fd993b2180b4c373af8b99aa28d4dcda5c2a8f10"},{"url":"https://git.kernel.org/stable/c/22dcbf7661c6ffc3247978c254dc40b833a0d429"},{"url":"https://git.kernel.org/stable/c/ca84a2c9be482836b86d780244f0357e5a778c46"}],"title":"jfs: array-index-out-of-bounds fix in dtReadFirst","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-2024-56598","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-10-01T20:01:28.259842Z"}}}],"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":"2025-10-01T20:07:13.876Z"}},{"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":"2025-11-03T20:50:33.896Z"}}]}}