{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-50143", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T19:36:19.956Z", "datePublished": "2024-11-07T09:31:20.340Z", "dateUpdated": "2026-08-05T11:42:00.674Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:42:00.674Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: fix uninit-value use in udf_get_fileshortad\n\nCheck for overflow when computing alen in udf_current_aext to mitigate\nlater uninit-value use in udf_get_fileshortad KMSAN bug[1].\nAfter applying the patch reproducer did not trigger any issue[2].\n\n[1] https://syzkaller.appspot.com/bug?extid=8901c4560b7ab5c2f9df\n[2] https://syzkaller.appspot.com/x/log.txt?x=10242227980000" } ], "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 vulnerable extent-walk code is reached only through a locally mounted UDF filesystem backed by an attacker-crafted image (ISO, loop device, or removable medium), then exercised by ordinary local file I/O syscalls. UDF is not a network-facing service, so there is no remote or adjacent-network path to this code.\nAC:L - The attacker fully controls the on-disk `lengthAllocDescs` field, so producing the integer overflow and the negative `alen` that defeats the bounds check is deterministic; no race, no memory-layout luck, and no attacker-uncontrollable precondition is involved. A simple read or close of a file on the crafted image triggers the walk every time.\nPR:N - The attacker needs no account or privileges on the target system — supplying a malicious UDF image (USB stick, ISO download, or exported disk image) is sufficient, and all attacker-controlled state lives in the image itself. This matches the scoring of the sibling `lengthAllocDescs` bug CVE-2025-40044.\nUI:R - UDF sets only `FS_REQUIRES_DEV` (no `FS_USERNS_MOUNT`), so the image cannot be mounted from an unprivileged user namespace; a privileged user or automount daemon must mount the attacker-supplied medium before the flaw becomes reachable.\nS:U - The out-of-bounds accesses stay within kernel memory of the same system with no crossing of a virtualization, IOMMU, or sandbox boundary. This is a conventional in-kernel memory-safety defect.\nC:H - The defeated bounds check yields an unbounded out-of-bounds read of kernel heap/page memory interpreted as extent descriptors, and `udf_update_tag()`/`crc_itu_t()` additionally reads far past the buffer. The leaked values become block mappings observable through file reads, giving an oracle for adjacent kernel memory contents.\nI:H - `udf_write_aext()` writes an 8-byte attacker-influenced `short_ad`/`long_ad` at `epos->bh->b_data + epos->offset` after `epos->offset` has been advanced past the buffer without bound, producing a controllable out-of-bounds heap write reachable from truncate/delete/insert extent paths. Such a write primitive is leverageable for kernel data corruption and control-flow hijacking.\nA:H - The wild reads and writes at large offsets past the buffer readily hit unmapped or unrelated memory, causing KASAN/KMSAN reports, corruption of neighbouring kernel objects, and kernel oops or panic. The condition is reproducible on demand from the crafted image." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/udf/inode.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "5eb76fb98b3335aa5cca6a7db2e659561c79c32b", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "417bd613bdbe791549f7687bb1b9b8012ff111c2", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0ce61b1f6b32df822b59c680cbe8e5ba5d335742", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "4fc0d8660e391dcd8dde23c44d702be1f6846c61", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "72e445df65a0aa9066c6fe2b8736ba2fcca6dac7", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "1ac49babc952f48d82676979b20885e480e69be8", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e52e0b92ed31dc62afbda15c243dcee0bb5bb58d", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "264db9d666ad9a35075cc9ed9ec09d021580fbb1", "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/udf/inode.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": "5.10.246", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.170", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.115", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.59", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.6", "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": "5.10.246" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.170" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.115" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.59" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.11.6" }, { "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/5eb76fb98b3335aa5cca6a7db2e659561c79c32b" }, { "url": "https://git.kernel.org/stable/c/417bd613bdbe791549f7687bb1b9b8012ff111c2" }, { "url": "https://git.kernel.org/stable/c/0ce61b1f6b32df822b59c680cbe8e5ba5d335742" }, { "url": "https://git.kernel.org/stable/c/4fc0d8660e391dcd8dde23c44d702be1f6846c61" }, { "url": "https://git.kernel.org/stable/c/72e445df65a0aa9066c6fe2b8736ba2fcca6dac7" }, { "url": "https://git.kernel.org/stable/c/1ac49babc952f48d82676979b20885e480e69be8" }, { "url": "https://git.kernel.org/stable/c/e52e0b92ed31dc62afbda15c243dcee0bb5bb58d" }, { "url": "https://git.kernel.org/stable/c/264db9d666ad9a35075cc9ed9ec09d021580fbb1" } ], "title": "udf: fix uninit-value use in udf_get_fileshortad", "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-2024-50143", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-10-01T20:21:00.516802Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-908", "description": "CWE-908 Use of Uninitialized Resource" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:27:14.006Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:26:02.747Z" } } ] } }