{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43075","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:55.982Z","datePublished":"2026-05-06T07:40:03.337Z","dateUpdated":"2026-05-11T22:17:14.141Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:17:14.141Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix out-of-bounds write in ocfs2_write_end_inline\n\nKASAN reports a use-after-free write of 4086 bytes in\nocfs2_write_end_inline, called from ocfs2_write_end_nolock during a\ncopy_file_range splice fallback on a corrupted ocfs2 filesystem mounted on\na loop device.  The actual bug is an out-of-bounds write past the inode\nblock buffer, not a true use-after-free.  The write overflows into an\nadjacent freed page, which KASAN reports as UAF.\n\nThe root cause is that ocfs2_try_to_write_inline_data trusts the on-disk\nid_count field to determine whether a write fits in inline data.  On a\ncorrupted filesystem, id_count can exceed the physical maximum inline data\ncapacity, causing writes to overflow the inode block buffer.\n\nCall trace (crash path):\n\n   vfs_copy_file_range (fs/read_write.c:1634)\n     do_splice_direct\n       splice_direct_to_actor\n         iter_file_splice_write\n           ocfs2_file_write_iter\n             generic_perform_write\n               ocfs2_write_end\n                 ocfs2_write_end_nolock (fs/ocfs2/aops.c:1949)\n                   ocfs2_write_end_inline (fs/ocfs2/aops.c:1915)\n                     memcpy_from_folio     <-- KASAN: write OOB\n\nSo add id_count upper bound check in ocfs2_validate_inode_block() to\nalongside the existing i_size check to fix it."}],"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"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/inode.c"],"versions":[{"version":"1afc32b952335f665327a1a9001ba1b44bb76fd9","lessThan":"e2c9dc6b6e96f3585f2a1062ca3374a52db0938f","status":"affected","versionType":"git"},{"version":"1afc32b952335f665327a1a9001ba1b44bb76fd9","lessThan":"947f953978b0d9463498d548d0f054f5a75be2e9","status":"affected","versionType":"git"},{"version":"1afc32b952335f665327a1a9001ba1b44bb76fd9","lessThan":"0c1af902223b6fcedb60904ca0b551254686c7b9","status":"affected","versionType":"git"},{"version":"1afc32b952335f665327a1a9001ba1b44bb76fd9","lessThan":"69d3c69ade1e4285ab4ca48fe7acee0767e65604","status":"affected","versionType":"git"},{"version":"1afc32b952335f665327a1a9001ba1b44bb76fd9","lessThan":"7bc5da4842bed3252d26e742213741a4d0ac1b14","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/ocfs2/inode.c"],"versions":[{"version":"2.6.24","status":"affected"},{"version":"0","lessThan":"2.6.24","status":"unaffected","versionType":"semver"},{"version":"6.6.136","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.83","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.24","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.14","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","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":"2.6.24","versionEndExcluding":"6.6.136"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.24","versionEndExcluding":"6.12.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.24","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.24","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.24","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/e2c9dc6b6e96f3585f2a1062ca3374a52db0938f"},{"url":"https://git.kernel.org/stable/c/947f953978b0d9463498d548d0f054f5a75be2e9"},{"url":"https://git.kernel.org/stable/c/0c1af902223b6fcedb60904ca0b551254686c7b9"},{"url":"https://git.kernel.org/stable/c/69d3c69ade1e4285ab4ca48fe7acee0767e65604"},{"url":"https://git.kernel.org/stable/c/7bc5da4842bed3252d26e742213741a4d0ac1b14"}],"title":"ocfs2: fix out-of-bounds write in ocfs2_write_end_inline","x_generator":{"engine":"bippy-1.2.0"}}}}