{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80644","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-26T14:34:25.778Z","datePublished":"2026-08-28T06:48:55.076Z","dateUpdated":"2026-08-28T06:48:55.076Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-28T06:48:55.076Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: don't BUG_ON an invalid journal dinode\n\n[BUG]\nA fuzzed OCFS2 image can corrupt the current slot journal dinode while\nmount is still in progress. The mount path first reports the invalid\njournal block and then crashes in shutdown:\n\nkernel BUG at fs/ocfs2/journal.c:1034!\nOops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\nRIP: 0010:ocfs2_journal_toggle_dirty+0x2d6/0x340 fs/ocfs2/journal.c:1034\nCall Trace:\n ocfs2_journal_shutdown+0x414/0xc30 fs/ocfs2/journal.c:1116\n ocfs2_mount_volume fs/ocfs2/super.c:1785 [inline]\n ocfs2_fill_super+0x30a9/0x3cd0 fs/ocfs2/super.c:1083\n get_tree_bdev_flags+0x38b/0x640 fs/super.c:1698\n get_tree_bdev+0x24/0x40 fs/super.c:1721\n ocfs2_get_tree+0x21/0x30 fs/ocfs2/super.c:1184\n vfs_get_tree+0x9a/0x370 fs/super.c:1758\n fc_mount fs/namespace.c:1199 [inline]\n do_new_mount_fc fs/namespace.c:3642 [inline]\n do_new_mount fs/namespace.c:3718 [inline]\n path_mount+0x5b8/0x1ea0 fs/namespace.c:4028\n do_mount fs/namespace.c:4041 [inline]\n __do_sys_mount fs/namespace.c:4229 [inline]\n __se_sys_mount fs/namespace.c:4206 [inline]\n __x64_sys_mount+0x282/0x320 fs/namespace.c:4206\n ...\n\n[CAUSE]\nocfs2_journal_toggle_dirty() used to return -EIO when journal->j_bh no\nlonger contained a valid dinode, because the startup and shutdown paths\nalready handled that failure. Commit 10995aa2451a\n(\"ocfs2: Morph the haphazard OCFS2_IS_VALID_DINODE() checks.\") changed\nthe check to a BUG_ON() under the assumption that the journal dinode had\nalready been validated. That turns an unexpected invalid journal dinode\nduring mount teardown into a kernel crash instead of a normal mount\nfailure.\n\n[FIX]\nReplace the BUG_ON() with WARN_ON() and return -EIO. This keeps the\ninvariant warning for debugging, but restores the original behavior of\nfailing startup or shutdown cleanly instead of panicking the kernel."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/journal.c"],"versions":[{"version":"10995aa2451afa20b721cc7de856cae1a13dba57","lessThan":"bf1d59cf2ac8a1730607ebaa0bc0dc6d00f197d0","status":"affected","versionType":"git"},{"version":"10995aa2451afa20b721cc7de856cae1a13dba57","lessThan":"86509c5296fe46ad6bcdd83931a53c2c6b7913a8","status":"affected","versionType":"git"},{"version":"10995aa2451afa20b721cc7de856cae1a13dba57","lessThan":"12c32a7350b670aaaaf2e01583d8648ec0c9755c","status":"affected","versionType":"git"},{"version":"10995aa2451afa20b721cc7de856cae1a13dba57","lessThan":"b460f8d01a12061853d02c8fb693fb42450acd7d","status":"affected","versionType":"git"},{"version":"10995aa2451afa20b721cc7de856cae1a13dba57","lessThan":"a06eec15596e5801bad59ad16cd2bf4f0fa839a1","status":"affected","versionType":"git"},{"version":"10995aa2451afa20b721cc7de856cae1a13dba57","lessThan":"3852478d34c7baa490ba9c7374ee901a56eea577","status":"affected","versionType":"git"},{"version":"10995aa2451afa20b721cc7de856cae1a13dba57","lessThan":"5b33f99f3e48465bd93219495381a5aef4fa967f","status":"affected","versionType":"git"},{"version":"10995aa2451afa20b721cc7de856cae1a13dba57","lessThan":"c0438198c28b1d22c272751af5e717c11d9fa8dd","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/journal.c"],"versions":[{"version":"2.6.29","status":"affected"},{"version":"0","lessThan":"2.6.29","status":"unaffected","versionType":"semver"},{"version":"5.10.261","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.212","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.178","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.97","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.40","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.5","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","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":"2.6.29","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/bf1d59cf2ac8a1730607ebaa0bc0dc6d00f197d0"},{"url":"https://git.kernel.org/stable/c/86509c5296fe46ad6bcdd83931a53c2c6b7913a8"},{"url":"https://git.kernel.org/stable/c/12c32a7350b670aaaaf2e01583d8648ec0c9755c"},{"url":"https://git.kernel.org/stable/c/b460f8d01a12061853d02c8fb693fb42450acd7d"},{"url":"https://git.kernel.org/stable/c/a06eec15596e5801bad59ad16cd2bf4f0fa839a1"},{"url":"https://git.kernel.org/stable/c/3852478d34c7baa490ba9c7374ee901a56eea577"},{"url":"https://git.kernel.org/stable/c/5b33f99f3e48465bd93219495381a5aef4fa967f"},{"url":"https://git.kernel.org/stable/c/c0438198c28b1d22c272751af5e717c11d9fa8dd"}],"title":"ocfs2: don't BUG_ON an invalid journal dinode","x_generator":{"engine":"bippy-1.2.0"}}}}