{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-35787", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-17T12:19:12.338Z", "datePublished": "2024-05-17T12:24:35.137Z", "dateUpdated": "2026-08-05T11:29:55.072Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:29:55.072Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/md-bitmap: fix incorrect usage for sb_index\n\nCommit d7038f951828 (\"md-bitmap: don't use ->index for pages backing the\nbitmap file\") removed page->index from bitmap code, but left wrong code\nlogic for clustered-md. current code never set slot offset for cluster\nnodes, will sometimes cause crash in clustered env.\n\nCall trace (partly):\n md_bitmap_file_set_bit+0x110/0x1d8 [md_mod]\n md_bitmap_startwrite+0x13c/0x240 [md_mod]\n raid1_make_request+0x6b0/0x1c08 [raid1]\n md_handle_request+0x1dc/0x368 [md_mod]\n md_submit_bio+0x80/0xf8 [md_mod]\n __submit_bio+0x178/0x300\n submit_bio_noacct_nocheck+0x11c/0x338\n submit_bio_noacct+0x134/0x614\n submit_bio+0x28/0xdc\n submit_bh_wbc+0x130/0x1cc\n submit_bh+0x1c/0x28" } ], "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 vulnerable code is reached through the local block-I/O path (`submit_bio` → `md_submit_bio` → `raid1_make_request` → `md_bitmap_startwrite`) on a clustered md array; no network protocol handler processes attacker data here.\nAC:L - On any cluster node whose slot is non-zero (every node but DLM slot 1), the index computation is unconditionally negative, so the out-of-bounds `set_bit()` fires on the first write to each bitmap chunk — deterministic, with no race and no memory-layout precondition the attacker cannot influence.\nPR:L - Clustered md arrays are deployed under shared filesystems (GFS2/OCFS2), so any unprivileged local user with write access to a file generates the bios that reach `md_bitmap_startwrite`; there is no capability check on the path from `write()` to `md_bitmap_file_set_bit()`.\nUI:N - The attacker simply issues writes to the array; no action by any other user or administrator is needed at exploitation time.\nS:U - The corrupted memory is kernel slab memory belonging to the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - `md_bitmap_file_clear_bit()` performs an out-of-bounds `test_page_attr()` read before the `filemap_attr` allocation, and the resulting slab corruption is a general heap-corruption primitive that can be leveraged to disclose kernel memory.\nI:H - `set_bit()` with a negative bit number writes into slab memory preceding the `filemap_attr` buffer at an offset the attacker steers by choosing the written file offset, giving a controlled OOB bit-set usable for heap corruption; additionally the write-intent bitmap is never marked dirty, so the on-disk bitmap goes stale and RAID resync produces inconsistent data.\nA:H - The commit states the bug \"will sometimes cause crash in clustered env\" and includes an oops trace through `md_bitmap_file_set_bit`; slab corruption from repeated OOB writes readily panics the node." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/md/md-bitmap.c" ], "versions": [ { "version": "d7038f951828da19fa9aafddfa087b69032c9687", "lessThan": "736ad6c577a367834118f57417038d45bb5e0a31", "status": "affected", "versionType": "git" }, { "version": "d7038f951828da19fa9aafddfa087b69032c9687", "lessThan": "55e55eb65fd5e09faf5a0e49ffcdd37905aaf4da", "status": "affected", "versionType": "git" }, { "version": "d7038f951828da19fa9aafddfa087b69032c9687", "lessThan": "5a95815b17428ce2f56ec18da5e0d1b2a1a15240", "status": "affected", "versionType": "git" }, { "version": "d7038f951828da19fa9aafddfa087b69032c9687", "lessThan": "ecbd8ebb51bf7e4939d83b9e6022a55cac44ef06", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/md/md-bitmap.c" ], "versions": [ { "version": "6.6", "status": "affected" }, { "version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.24", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.12", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8.3", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9", "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": "6.6", "versionEndExcluding": "6.6.24" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.7.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.8.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.9" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/736ad6c577a367834118f57417038d45bb5e0a31" }, { "url": "https://git.kernel.org/stable/c/55e55eb65fd5e09faf5a0e49ffcdd37905aaf4da" }, { "url": "https://git.kernel.org/stable/c/5a95815b17428ce2f56ec18da5e0d1b2a1a15240" }, { "url": "https://git.kernel.org/stable/c/ecbd8ebb51bf7e4939d83b9e6022a55cac44ef06" } ], "title": "md/md-bitmap: fix incorrect usage for sb_index", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-12T15:19:46.019142Z", "id": "CVE-2024-35787", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-12T15:20:01.240Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T03:21:47.386Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/736ad6c577a367834118f57417038d45bb5e0a31", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/55e55eb65fd5e09faf5a0e49ffcdd37905aaf4da", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/5a95815b17428ce2f56ec18da5e0d1b2a1a15240", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/ecbd8ebb51bf7e4939d83b9e6022a55cac44ef06", "tags": [ "x_transferred" ] } ] } ] } }