{"cve":"CVE-2026-46160","nvd":{"published":"2026-05-28T10:16:31.647","modified":"2026-06-19T13:16:34.320","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix missing last_unlink_trans update when removing a directory\n\nWhen removing a directory we are not updating its last_unlink_trans field,\nwhich can result in incorrect fsync behaviour in case some one fsyncs the\ndirectory after it was removed because it's holding a file descriptor on\nit.\n\nExample scenario:\n\n mkdir /mnt/dir1\n mkdir /mnt/dir1/dir2\n mkdir /mnt/dir3\n\n sync -f /mnt\n\n # Do some change to the directory and fsync it.\n chmod 700 /mnt/dir1\n xfs_io -c fsync /mnt/dir1\n\n # Move dir2 out of dir1 so that dir1 becomes empty.\n mv /mnt/dir1/dir2 /mnt/dir3/\n\n open fd on /mnt/dir1\n call rmdir(2) on path \"/mnt/dir1\"\n fsync fd\n\n \n\nWhen attempting to mount the filesystem, the log replay will fail with\nan -EIO error and dmesg/syslog has the following:\n\n [445771.626482] BTRFS info (device dm-0): first mount of filesystem 0368bbea-6c5e-44b5-b409-09abe496e650\n [445771.626486] BTRFS info (device dm-0): using crc32c checksum algorithm\n [445771.627912] BTRFS info (device dm-0): start tree-log replay\n [445771.628335] page: refcount:2 mapcount:0 mapping:0000000061443ddc index:0x1d00 pfn:0x7072a5\n [445771.629453] memcg:ffff89f400351b00\n [445771.629892] aops:btree_aops [btrfs] ino:1\n [445771.630737] flags: 0x17fffc00000402a(uptodate|lru|private|writeback|node=0|zone=2|lastcpupid=0x1ffff)\n [445771.632359] raw: 017fffc00000402a fffff47284d950c8 fffff472907b7c08 ffff89f458e412b8\n [445771.633713] raw: 0000000000001d00 ffff89f6c51d1a90 00000002ffffffff ffff89f400351b00\n [445771.635029] page dumped because: eb page dump\n [445771.635825] BTRFS critical (device dm-0): corrupt leaf: root=5 block=30408704 slot=10 ino=258, invalid nlink: has 2 expect no more than 1 for dir\n [445771.638088] BTRFS info (device dm-0): leaf 30408704 gen 10 total ptrs 17 free space 14878 owner 5\n [445771.638091] BTRFS info (device dm-0): refs 4 lock_owner 0 current 3581087\n [445771.638094] \titem 0 key (256 INODE_ITEM 0) itemoff 16123 itemsize 160\n [445771.638097] \t\tinode generation 3 transid 9 size 16 nbytes 16384\n [445771.638098] \t\tblock group 0 mode 40755 links 1 uid 0 gid 0\n [445771.638100] \t\trdev 0 sequence 2 flags 0x0\n [445771.638102] \t\tatime 1775744884.0\n [445771.660056] \t\tctime 1775744885.645502983\n [445771.660058] \t\tmtime 1775744885.645502983\n [445771.660060] \t\totime 1775744884.0\n [445771.660062] \titem 1 key (256 INODE_REF 256) itemoff 16111 itemsize 12\n [445771.660064] \t\tindex 0 name_len 2\n [445771.660066] \titem 2 key (256 DIR_ITEM 1843588421) itemoff 16077 itemsize 34\n [445771.660068] \t\tlocation key (259 1 0) type 2\n [445771.660070] \t\ttransid 9 data_len 0 name_len 4\n [445771.660075] \titem 3 key (256 DIR_ITEM 2363071922) itemoff 16043 itemsize 34\n [445771.660076] \t\tlocation key (257 1 0) type 2\n [445771.660077] \t\ttransid 9 data_len 0 name_len 4\n [445771.660078] \titem 4 key (256 DIR_INDEX 2) itemoff 16009 itemsize 34\n [445771.660079] \t\tlocation key (257 1 0) type 2\n [445771.660080] \t\ttransid 9 data_len 0 name_len 4\n [445771.660081] \titem 5 key (256 DIR_INDEX 3) itemoff 15975 itemsize 34\n [445771.660082] \t\tlocation key (259 1 0) type 2\n [445771.660083] \t\ttransid 9 data_len 0 name_len 4\n [445771.660084] \titem 6 key (257 INODE_ITEM 0) itemoff 15815 itemsize 160\n [445771.660086] \t\tinode generation 9 transid 9 size 8 nbytes 0\n [445771.660087] \t\tblock group 0 mode 40777 links 1 uid 0 gid 0\n [445771.660088] \t\trdev 0 sequence 2 flags 0x0\n [445771.660089] \t\tatime 1775744885.641174097\n [445771.660090] \t\tctime 1775744885.645502983\n [445771.660091] \t\tmtime 1775744885.645502983\n [445771.660105] \t\totime 1775744885.641174097\n [445771.660106] \titem 7 key (257 INODE_REF 256) itemoff 15801 itemsize 14\n [445771.660107] \t\tindex 2 name_len 4\n [445771.660108] \titem 8 key (257 DIR_ITEM 2676584006) itemoff 15767 itemsize 34\n [445771.660109] \t\tlocation key (2\n---truncated---","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":[],"references":["https://git.kernel.org/stable/c/2525998ac956476bded26b9f34c4164dc890b87a","https://git.kernel.org/stable/c/36fcc2c7517f8a86379154c9793f867592aa8b7e","https://git.kernel.org/stable/c/6acbb2f6dff23c9bb9761fb98b516525b9cf1ce9","https://git.kernel.org/stable/c/999757231c49376cd1a37308d2c8c4c9932571e1","https://git.kernel.org/stable/c/aa9c3ecaf7337df3a689318584f879b5339ede0f"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-46160","score":0.00128,"percentile":0.02427,"date":"2026-10-31"},"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."]}