{"cve":"CVE-2026-43349","nvd":{"published":"2026-05-08T14:16:44.997","modified":"2026-06-17T10:49:25.913","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-908"],"references":["https://git.kernel.org/stable/c/59970b2586fef4b13e96527b9d232bed30b640cd","https://git.kernel.org/stable/c/7b9161a605e91d0987e2596a245dc1f21621b23f","https://git.kernel.org/stable/c/a10b89343d41ceee1af0ec38d3a74e526c77fa09"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-43349","score":0.00112,"percentile":0.01377,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}