CVE-2026-46160 (GCVE-0-2026-46160)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-05-28 09:36
VLAI
Title
btrfs: fix missing last_unlink_trans update when removing a directory
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix missing last_unlink_trans update when removing a directory When removing a directory we are not updating its last_unlink_trans field, which can result in incorrect fsync behaviour in case some one fsyncs the directory after it was removed because it's holding a file descriptor on it. Example scenario: mkdir /mnt/dir1 mkdir /mnt/dir1/dir2 mkdir /mnt/dir3 sync -f /mnt # Do some change to the directory and fsync it. chmod 700 /mnt/dir1 xfs_io -c fsync /mnt/dir1 # Move dir2 out of dir1 so that dir1 becomes empty. mv /mnt/dir1/dir2 /mnt/dir3/ open fd on /mnt/dir1 call rmdir(2) on path "/mnt/dir1" fsync fd <trigger power failure> When attempting to mount the filesystem, the log replay will fail with an -EIO error and dmesg/syslog has the following: [445771.626482] BTRFS info (device dm-0): first mount of filesystem 0368bbea-6c5e-44b5-b409-09abe496e650 [445771.626486] BTRFS info (device dm-0): using crc32c checksum algorithm [445771.627912] BTRFS info (device dm-0): start tree-log replay [445771.628335] page: refcount:2 mapcount:0 mapping:0000000061443ddc index:0x1d00 pfn:0x7072a5 [445771.629453] memcg:ffff89f400351b00 [445771.629892] aops:btree_aops [btrfs] ino:1 [445771.630737] flags: 0x17fffc00000402a(uptodate|lru|private|writeback|node=0|zone=2|lastcpupid=0x1ffff) [445771.632359] raw: 017fffc00000402a fffff47284d950c8 fffff472907b7c08 ffff89f458e412b8 [445771.633713] raw: 0000000000001d00 ffff89f6c51d1a90 00000002ffffffff ffff89f400351b00 [445771.635029] page dumped because: eb page dump [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 [445771.638088] BTRFS info (device dm-0): leaf 30408704 gen 10 total ptrs 17 free space 14878 owner 5 [445771.638091] BTRFS info (device dm-0): refs 4 lock_owner 0 current 3581087 [445771.638094] item 0 key (256 INODE_ITEM 0) itemoff 16123 itemsize 160 [445771.638097] inode generation 3 transid 9 size 16 nbytes 16384 [445771.638098] block group 0 mode 40755 links 1 uid 0 gid 0 [445771.638100] rdev 0 sequence 2 flags 0x0 [445771.638102] atime 1775744884.0 [445771.660056] ctime 1775744885.645502983 [445771.660058] mtime 1775744885.645502983 [445771.660060] otime 1775744884.0 [445771.660062] item 1 key (256 INODE_REF 256) itemoff 16111 itemsize 12 [445771.660064] index 0 name_len 2 [445771.660066] item 2 key (256 DIR_ITEM 1843588421) itemoff 16077 itemsize 34 [445771.660068] location key (259 1 0) type 2 [445771.660070] transid 9 data_len 0 name_len 4 [445771.660075] item 3 key (256 DIR_ITEM 2363071922) itemoff 16043 itemsize 34 [445771.660076] location key (257 1 0) type 2 [445771.660077] transid 9 data_len 0 name_len 4 [445771.660078] item 4 key (256 DIR_INDEX 2) itemoff 16009 itemsize 34 [445771.660079] location key (257 1 0) type 2 [445771.660080] transid 9 data_len 0 name_len 4 [445771.660081] item 5 key (256 DIR_INDEX 3) itemoff 15975 itemsize 34 [445771.660082] location key (259 1 0) type 2 [445771.660083] transid 9 data_len 0 name_len 4 [445771.660084] item 6 key (257 INODE_ITEM 0) itemoff 15815 itemsize 160 [445771.660086] inode generation 9 transid 9 size 8 nbytes 0 [445771.660087] block group 0 mode 40777 links 1 uid 0 gid 0 [445771.660088] rdev 0 sequence 2 flags 0x0 [445771.660089] atime 1775744885.641174097 [445771.660090] ctime 1775744885.645502983 [445771.660091] mtime 1775744885.645502983 [445771.660105] otime 1775744885.641174097 [445771.660106] item 7 key (257 INODE_REF 256) itemoff 15801 itemsize 14 [445771.660107] index 2 name_len 4 [445771.660108] item 8 key (257 DIR_ITEM 2676584006) itemoff 15767 itemsize 34 [445771.660109] location key (2 ---truncated---
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cc3c0a0f965754ce230d93ba44ee5b34fbe6138a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < aa9c3ecaf7337df3a689318584f879b5339ede0f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < fb388eb58c1ba047ccabc33901839acfecadcf49 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 36fcc2c7517f8a86379154c9793f867592aa8b7e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 999757231c49376cd1a37308d2c8c4c9932571e1 (git)
Affected: 0 , < 6.6.141 (semver)
Affected: 0 , < 6.12.91 (semver)
Affected: 0 , < 6.18.30 (semver)
Affected: 0 , < 7.0.7 (semver)
Create a notification for this product.
Linux Linux Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.30 , ≤ 6.18.* (semver)
Unaffected: 7.0.7 , ≤ 7.0.* (semver)
Unaffected: 7.1-rc2 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027s 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   \u003ctrigger power failure\u003e\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---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-28T09:36:15.580Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cc3c0a0f965754ce230d93ba44ee5b34fbe6138a"
        },
        {
          "url": "https://git.kernel.org/stable/c/aa9c3ecaf7337df3a689318584f879b5339ede0f"
        },
        {
          "url": "https://git.kernel.org/stable/c/fb388eb58c1ba047ccabc33901839acfecadcf49"
        },
        {
          "url": "https://git.kernel.org/stable/c/36fcc2c7517f8a86379154c9793f867592aa8b7e"
        },
        {
          "url": "https://git.kernel.org/stable/c/999757231c49376cd1a37308d2c8c4c9932571e1"
        }
      ],
      "title": "btrfs: fix missing last_unlink_trans update when removing a directory",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46160",
    "datePublished": "2026-05-28T09:36:15.580Z",
    "dateReserved": "2026-05-13T15:03:33.102Z",
    "dateUpdated": "2026-05-28T09:36:15.580Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-46160",
      "date": "2026-05-29",
      "epss": "0.00018",
      "percentile": "0.05164"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-46160\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-28T10:16:31.647\",\"lastModified\":\"2026-05-28T13:44:01.663\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\u0027s 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   \u003ctrigger power failure\u003e\\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---\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/36fcc2c7517f8a86379154c9793f867592aa8b7e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/999757231c49376cd1a37308d2c8c4c9932571e1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aa9c3ecaf7337df3a689318584f879b5339ede0f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cc3c0a0f965754ce230d93ba44ee5b34fbe6138a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fb388eb58c1ba047ccabc33901839acfecadcf49\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.