{"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"]}]}]}}