{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-42306", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-30T07:40:12.273Z", "datePublished": "2024-08-17T09:09:11.938Z", "dateUpdated": "2026-08-05T11:36:33.068Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:36:33.068Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: Avoid using corrupted block bitmap buffer\n\nWhen the filesystem block bitmap is corrupted, we detect the corruption\nwhile loading the bitmap and fail the allocation with error. However the\nnext allocation from the same bitmap will notice the bitmap buffer is\nalready loaded and tries to allocate from the bitmap with mixed results\n(depending on the exact nature of the bitmap corruption). Fix the\nproblem by using BH_verified bit to indicate whether the bitmap is valid\nor not." } ], "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 through local filesystem operations (write/create/mkdir) on a mounted UDF volume, whose image is attacker-supplied via removable media or a loop device — no network path exists.\nAC:L - Triggering is fully deterministic and requires no race: the attacker crafts a UDF image with a bitmap whose own descriptor blocks are marked free, then performs two block allocations — the first fails with -EFSCORRUPTED, the second silently uses the cached corrupt bitmap.\nPR:L - UDF images from removable media are routinely auto-mounted by desktop/kiosk automounters (udisks2) without administrator action, after which any unprivileged local user with write access to the volume reaches udf_new_block() and triggers the corrupt-bitmap allocation path.\nUI:N - Once the malicious volume is present, no victim action is needed — the attacker performs the two allocations themselves via ordinary file creation or write syscalls; automount requires no interactive step.\nS:U - The corruption is confined to kernel memory and filesystem metadata within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Allocating the bitmap's own blocks makes one buffer_head serve as both the space bitmap and an allocation extent descriptor, so the extent parser reads attacker-influenced bitmap bytes as extent offsets and lengths, yielding out-of-bounds reads and disclosure of adjacent kernel buffer contents.\nI:H - The resulting type confusion lets bitmap bit-set/clear operations write into a live allocExtDesc (and vice versa), producing attacker-influenced metadata corruption and out-of-bounds writes usable for further heap corruption.\nA:H - The condition reproduces the syzbot-reported WARNING in __udf_add_aext() and leads to cascading metadata corruption and kernel oops, rendering the system unavailable." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/udf/balloc.c", "fs/udf/super.c" ], "versions": [ { "version": "7648ea9896b31aff38830d81188f5b7a1773e4a8", "lessThan": "cae9e59cc41683408b70b9ab569f8654866ba914", "status": "affected", "versionType": "git" }, { "version": "4ac54312f623c6d2ca30c36c1ef530c11f5aff64", "lessThan": "2199e157a465aaf98294d3932797ecd7fce942d5", "status": "affected", "versionType": "git" }, { "version": "099bf90d7fc4622da9fd4727f6d318a0f12d10be", "lessThan": "6a43e3c210df6c5f00570f4be49a897677dbcb64", "status": "affected", "versionType": "git" }, { "version": "6ac8f2c8362afd2baa8e7b9c946597589e587d22", "lessThan": "271cab2ca00652bc984e269cf1208699a1e09cdd", "status": "affected", "versionType": "git" }, { "version": "1e0d4adf17e7ef03281d7b16555e7c1508c8ed2d", "lessThan": "57053b3bcf3403b80db6f65aba284d7dfe7326af", "status": "affected", "versionType": "git" }, { "version": "1e0d4adf17e7ef03281d7b16555e7c1508c8ed2d", "lessThan": "8ca170c39eca7cad6e0cfeb24e351d8f8eddcd65", "status": "affected", "versionType": "git" }, { "version": "1e0d4adf17e7ef03281d7b16555e7c1508c8ed2d", "lessThan": "a90d4471146de21745980cba51ce88e7926bcc4f", "status": "affected", "versionType": "git" }, { "version": "f862a9049c3f6e73a5504a1ac10ffd5bc253ab55", "status": "affected", "versionType": "git" }, { "version": "4622cc1b6d86013e01c56b60b092b5e4726c8e52", "status": "affected", "versionType": "git" }, { "version": "5.4.257", "lessThan": "5.4.282", "status": "affected", "versionType": "semver" }, { "version": "5.10.195", "lessThan": "5.10.224", "status": "affected", "versionType": "semver" }, { "version": "5.15.132", "lessThan": "5.15.165", "status": "affected", "versionType": "semver" }, { "version": "6.1.53", "lessThan": "6.1.103", "status": "affected", "versionType": "semver" }, { "version": "4.14.326", "lessThan": "4.15", "status": "affected", "versionType": "semver" }, { "version": "4.19.295", "lessThan": "4.20", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/udf/balloc.c", "fs/udf/super.c" ], "versions": [ { "version": "6.3", "status": "affected" }, { "version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.282", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.224", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.165", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.103", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.44", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.3", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11", "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": "5.4.257", "versionEndExcluding": "5.4.282" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.195", "versionEndExcluding": "5.10.224" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.132", "versionEndExcluding": "5.15.165" }, { "vulnerable": true, "criteria": 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"https://git.kernel.org/stable/c/2199e157a465aaf98294d3932797ecd7fce942d5" }, { "url": "https://git.kernel.org/stable/c/6a43e3c210df6c5f00570f4be49a897677dbcb64" }, { "url": "https://git.kernel.org/stable/c/271cab2ca00652bc984e269cf1208699a1e09cdd" }, { "url": "https://git.kernel.org/stable/c/57053b3bcf3403b80db6f65aba284d7dfe7326af" }, { "url": "https://git.kernel.org/stable/c/8ca170c39eca7cad6e0cfeb24e351d8f8eddcd65" }, { "url": "https://git.kernel.org/stable/c/a90d4471146de21745980cba51ce88e7926bcc4f" } ], "title": "udf: Avoid using corrupted block bitmap buffer", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-42306", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T16:10:15.929324Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-12T17:33:27.843Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:04:14.937Z" } }, { "x_adpType": "supplier", "providerMetadata": { "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-05-12T11:56:52.686Z" }, "affected": [ { "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" } ] } ] } }