{"id":"DEBIAN-CVE-2026-43349","details":"In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to avoid uninit-value access in f2fs_sanity_check_node_footer  syzbot reported a f2fs bug as below:  BUG: KMSAN: uninit-value in f2fs_sanity_check_node_footer+0x374/0xa20 fs/f2fs/node.c:1520  f2fs_sanity_check_node_footer+0x374/0xa20 fs/f2fs/node.c:1520  f2fs_finish_read_bio+0xe1e/0x1d60 fs/f2fs/data.c:177  f2fs_read_end_io+0x6ab/0x2220 fs/f2fs/data.c:-1  bio_endio+0x1006/0x1160 block/bio.c:1792  submit_bio_noacct+0x533/0x2960 block/blk-core.c:891  submit_bio+0x57a/0x620 block/blk-core.c:926  blk_crypto_submit_bio include/linux/blk-crypto.h:203 [inline]  f2fs_submit_read_bio+0x12c/0x360 fs/f2fs/data.c:557  f2fs_submit_page_bio+0xee2/0x1450 fs/f2fs/data.c:775  read_node_folio+0x384/0x4b0 fs/f2fs/node.c:1481  __get_node_folio+0x5db/0x15d0 fs/f2fs/node.c:1576  f2fs_get_inode_folio+0x40/0x50 fs/f2fs/node.c:1623  do_read_inode fs/f2fs/inode.c:425 [inline]  f2fs_iget+0x1209/0x9380 fs/f2fs/inode.c:596  f2fs_fill_super+0x8f5a/0xb2e0 fs/f2fs/super.c:5184  get_tree_bdev_flags+0x6e6/0x920 fs/super.c:1694  get_tree_bdev+0x38/0x50 fs/super.c:1717  f2fs_get_tree+0x35/0x40 fs/f2fs/super.c:5436  vfs_get_tree+0xb3/0x5d0 fs/super.c:1754  fc_mount fs/namespace.c:1193 [inline]  do_new_mount_fc fs/namespace.c:3763 [inline]  do_new_mount+0x885/0x1dd0 fs/namespace.c:3839  path_mount+0x7a2/0x20b0 fs/namespace.c:4159  do_mount fs/namespace.c:4172 [inline]  __do_sys_mount fs/namespace.c:4361 [inline]  __se_sys_mount+0x704/0x7f0 fs/namespace.c:4338  __x64_sys_mount+0xe4/0x150 fs/namespace.c:4338  x64_sys_call+0x39f0/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:166  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]  do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94  entry_SYSCALL_64_after_hwframe+0x77/0x7f  The root cause is: in f2fs_finish_read_bio(), we may access uninit data in folio if we failed to read the data from device into folio, let's add a check condition to avoid such issue.","modified":"2026-08-27T23:05:37.385615933Z","published":"2026-05-08T14:16:44.997Z","upstream":["CVE-2026-43349"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-43349"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.3-1"}]}],"versions":["6.12.100-1","6.12.101-1","6.12.105-1","6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1","6.12.85-1~bpo12+1","6.12.86-1","6.12.86-1~bpo12+1","6.12.88-1","6.12.88-1~bpo12+1","6.12.90-1","6.12.90-1~bpo12+1","6.12.90-2","6.12.90-2~bpo12+1","6.12.94-1","6.12.94-1~bpo12+1","6.12.95-1","6.12.95-1~bpo12+1","6.12.96-1","6.13.10-1~exp1","6.13.11-1~exp1","6.13.2-1~exp1","6.13.3-1~exp1","6.13.4-1~exp1","6.13.5-1~exp1","6.13.6-1~exp1","6.13.7-1~exp1","6.13.8-1~exp1","6.13.9-1~exp1","6.13~rc6-1~exp1","6.13~rc7-1~exp1","6.14.3-1~exp1","6.14.5-1~exp1","6.14.6-1~exp1","6.15-1~exp1","6.15.1-1~exp1","6.15.2-1~exp1","6.15.3-1~exp1","6.15.4-1~exp1","6.15.5-1~exp1","6.15.6-1~exp1","6.15~rc7-1~exp1","6.16-1~exp1","6.16.1-1~exp1","6.16.10-1","6.16.11-1","6.16.12-1","6.16.12-1~bpo13+1","6.16.12-2","6.16.3-1","6.16.3-1~bpo13+1","6.16.5-1","6.16.6-1","6.16.7-1","6.16.8-1","6.16.9-1","6.16~rc7-1~exp1","6.17.10-1","6.17.11-1","6.17.12-1","6.17.13-1","6.17.13-1~bpo13+1","6.17.2-1~exp1","6.17.5-1~exp1","6.17.6-1","6.17.7-1","6.17.7-2","6.17.8-1","6.17.8-1~bpo13+1","6.17.9-1","6.18.1-1~exp1","6.18.10-1","6.18.12-1","6.18.12-1~bpo13+1","6.18.13-1","6.18.14-1","6.18.15-1","6.18.15-1~bpo13+1","6.18.2-1~exp1","6.18.3-1","6.18.5-1","6.18.5-1~bpo13+1","6.18.8-1","6.18.9-1","6.18.9-1~bpo13+1","6.18~rc4-1~exp1","6.18~rc4-1~exp2","6.18~rc5-1~exp1","6.18~rc6-1~exp1","6.18~rc7-1~exp1","6.19-1~exp1","6.19.10-1","6.19.10-1~bpo13+1","6.19.11-1","6.19.11-1~bpo13+1","6.19.12-1","6.19.13-1","6.19.13-1~bpo13+1","6.19.14-1","6.19.14-1~bpo13+1","6.19.2-1~exp1","6.19.3-1~exp1","6.19.4-1~exp1","6.19.5-1~exp1","6.19.6-1","6.19.6-2","6.19.6-2~bpo13+1","6.19.8-1","6.19.8-1~bpo13+1","6.19~rc4-1~exp1","6.19~rc5-1~exp1","6.19~rc6-1~exp1","6.19~rc7-1~exp1","6.19~rc8-1~exp1","7.0-1~exp1","7.0.1-1~exp1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43349.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}