{"id":"CVE-2026-43349","state":"PUBLISHED","title":"f2fs: fix to avoid uninit-value access in f2fs_sanity_check_node_footer","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid uninit-value access in f2fs_sanity_check_node_footer\n\nsyzbot reported a f2fs bug as below:\n\nBUG: KMSAN: uninit-value in f2fs_sanity_check_node_footer+0x374/0xa20 fs/f2fs/node.c:1520\n f2fs_sanity_check_node_footer+0x374/0xa20 fs/f2fs/node.c:1520\n f2fs_finish_read_bio+0xe1e/0x1d60 fs/f2fs/data.c:177\n f2fs_read_end_io+0x6ab/0x2220 fs/f2fs/data.c:-1\n bio_endio+0x1006/0x1160 block/bio.c:1792\n submit_bio_noacct+0x533/0x2960 block/blk-core.c:891\n submit_bio+0x57a/0x620 block/blk-core.c:926\n blk_crypto_submit_bio include/linux/blk-crypto.h:203 [inline]\n f2fs_submit_read_bio+0x12c/0x360 fs/f2fs/data.c:557\n f2fs_submit_page_bio+0xee2/0x1450 fs/f2fs/data.c:775\n read_node_folio+0x384/0x4b0 fs/f2fs/node.c:1481\n __get_node_folio+0x5db/0x15d0 fs/f2fs/node.c:1576\n f2fs_get_inode_folio+0x40/0x50 fs/f2fs/node.c:1623\n do_read_inode fs/f2fs/inode.c:425 [inline]\n f2fs_iget+0x1209/0x9380 fs/f2fs/inode.c:596\n f2fs_fill_super+0x8f5a/0xb2e0 fs/f2fs/super.c:5184\n get_tree_bdev_flags+0x6e6/0x920 fs/super.c:1694\n get_tree_bdev+0x38/0x50 fs/super.c:1717\n f2fs_get_tree+0x35/0x40 fs/f2fs/super.c:5436\n vfs_get_tree+0xb3/0x5d0 fs/super.c:1754\n fc_mount fs/namespace.c:1193 [inline]\n do_new_mount_fc fs/namespace.c:3763 [inline]\n do_new_mount+0x885/0x1dd0 fs/namespace.c:3839\n path_mount+0x7a2/0x20b0 fs/namespace.c:4159\n do_mount fs/namespace.c:4172 [inline]\n __do_sys_mount fs/namespace.c:4361 [inline]\n __se_sys_mount+0x704/0x7f0 fs/namespace.c:4338\n __x64_sys_mount+0xe4/0x150 fs/namespace.c:4338\n x64_sys_call+0x39f0/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:166\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe root cause is: in f2fs_finish_read_bio(), we may access uninit data\nin folio if we failed to read the data from device into folio, let's add\na check condition to avoid such issue.","publishedAt":"2026-05-08T13:41:52.611Z","updatedAt":"2026-06-14T17:45:02.911Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"855c54f1803e3ebc613677b4f389c7f92656a1fc","status":"affected","lessThan":"59970b2586fef4b13e96527b9d232bed30b640cd","versionType":"git"},{"version":"50ac3ecd8e05b6bcc350c71a4307d40c030ec7e4","status":"affected","lessThan":"a10b89343d41ceee1af0ec38d3a74e526c77fa09","versionType":"git"},{"version":"50ac3ecd8e05b6bcc350c71a4307d40c030ec7e4","status":"affected","lessThan":"7b9161a605e91d0987e2596a245dc1f21621b23f","versionType":"git"},{"version":"c386753db52b3a80afa6612bfdcb925aa5ca260f","status":"affected","versionType":"git"},{"version":"6.18.13","status":"affected","lessThan":"6.18.25","versionType":"semver"},{"version":"6.19.3","status":"affected","lessThan":"6.20","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/data.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.0","versionType":"semver"},{"version":"6.18.25","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.2","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/data.c"]}],"references":["https://git.kernel.org/stable/c/59970b2586fef4b13e96527b9d232bed30b640cd","https://git.kernel.org/stable/c/a10b89343d41ceee1af0ec38d3a74e526c77fa09","https://git.kernel.org/stable/c/7b9161a605e91d0987e2596a245dc1f21621b23f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43349.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43349","state":"PUBLISHED","datePublished":"2026-05-08T13:41:52.611Z","dateUpdated":"2026-06-14T17:45:02.911Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:56.003Z"},"containers":{"cna":{"title":"f2fs: fix to avoid uninit-value access in f2fs_sanity_check_node_footer","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid uninit-value access in f2fs_sanity_check_node_footer\n\nsyzbot reported a f2fs bug as below:\n\nBUG: KMSAN: uninit-value in f2fs_sanity_check_node_footer+0x374/0xa20 fs/f2fs/node.c:1520\n f2fs_sanity_check_node_footer+0x374/0xa20 fs/f2fs/node.c:1520\n f2fs_finish_read_bio+0xe1e/0x1d60 fs/f2fs/data.c:177\n f2fs_read_end_io+0x6ab/0x2220 fs/f2fs/data.c:-1\n bio_endio+0x1006/0x1160 block/bio.c:1792\n submit_bio_noacct+0x533/0x2960 block/blk-core.c:891\n submit_bio+0x57a/0x620 block/blk-core.c:926\n blk_crypto_submit_bio include/linux/blk-crypto.h:203 [inline]\n f2fs_submit_read_bio+0x12c/0x360 fs/f2fs/data.c:557\n f2fs_submit_page_bio+0xee2/0x1450 fs/f2fs/data.c:775\n read_node_folio+0x384/0x4b0 fs/f2fs/node.c:1481\n __get_node_folio+0x5db/0x15d0 fs/f2fs/node.c:1576\n f2fs_get_inode_folio+0x40/0x50 fs/f2fs/node.c:1623\n do_read_inode fs/f2fs/inode.c:425 [inline]\n f2fs_iget+0x1209/0x9380 fs/f2fs/inode.c:596\n f2fs_fill_super+0x8f5a/0xb2e0 fs/f2fs/super.c:5184\n get_tree_bdev_flags+0x6e6/0x920 fs/super.c:1694\n get_tree_bdev+0x38/0x50 fs/super.c:1717\n f2fs_get_tree+0x35/0x40 fs/f2fs/super.c:5436\n vfs_get_tree+0xb3/0x5d0 fs/super.c:1754\n fc_mount fs/namespace.c:1193 [inline]\n do_new_mount_fc fs/namespace.c:3763 [inline]\n do_new_mount+0x885/0x1dd0 fs/namespace.c:3839\n path_mount+0x7a2/0x20b0 fs/namespace.c:4159\n do_mount fs/namespace.c:4172 [inline]\n __do_sys_mount fs/namespace.c:4361 [inline]\n __se_sys_mount+0x704/0x7f0 fs/namespace.c:4338\n __x64_sys_mount+0xe4/0x150 fs/namespace.c:4338\n x64_sys_call+0x39f0/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:166\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe root cause is: in f2fs_finish_read_bio(), we may access uninit data\nin folio if we failed to read the data from device into folio, let's add\na check condition to avoid such issue."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"855c54f1803e3ebc613677b4f389c7f92656a1fc","status":"affected","lessThan":"59970b2586fef4b13e96527b9d232bed30b640cd","versionType":"git"},{"version":"50ac3ecd8e05b6bcc350c71a4307d40c030ec7e4","status":"affected","lessThan":"a10b89343d41ceee1af0ec38d3a74e526c77fa09","versionType":"git"},{"version":"50ac3ecd8e05b6bcc350c71a4307d40c030ec7e4","status":"affected","lessThan":"7b9161a605e91d0987e2596a245dc1f21621b23f","versionType":"git"},{"version":"c386753db52b3a80afa6612bfdcb925aa5ca260f","status":"affected","versionType":"git"},{"version":"6.18.13","status":"affected","lessThan":"6.18.25","versionType":"semver"},{"version":"6.19.3","status":"affected","lessThan":"6.20","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/data.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.0","versionType":"semver"},{"version":"6.18.25","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.2","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/data.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/59970b2586fef4b13e96527b9d232bed30b640cd"},{"url":"https://git.kernel.org/stable/c/a10b89343d41ceee1af0ec38d3a74e526c77fa09"},{"url":"https://git.kernel.org/stable/c/7b9161a605e91d0987e2596a245dc1f21621b23f"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:45:02.911Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18.13","versionEndExcluding":"6.18.25"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0","versionEndExcluding":"7.0.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0","versionEndExcluding":"7.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}