cve/published/2025/CVE-2025-21879.json

{
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      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
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         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix use-after-free on inode when scanning root during em shrinking\n\nAt btrfs_scan_root() we are accessing the inode's root (and fs_info) in a\ncall to btrfs_fs_closing() after we have scheduled the inode for a delayed\niput, and that can result in a use-after-free on the inode in case the\ncleaner kthread does the iput before we dereference the inode in the call\nto btrfs_fs_closing().\n\nFix this by using the fs_info stored already in a local variable instead\nof doing inode->root->fs_info."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/btrfs/extent_map.c"
               ],
               "versions": [
                  {
                     "version": "1020443840569535f6025a855958f07ea3eebf71",
                     "lessThan": "5e79d26014f9386387575b9ed60d342057cee49b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1020443840569535f6025a855958f07ea3eebf71",
                     "lessThan": "59f37036bb7ab3d554c24abc856aabca01126414",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/btrfs/extent_map.c"
               ],
               "versions": [
                  {
                     "version": "6.13",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "6.13",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "6.13.6",
                     "lessThanOrEqual": "6.13.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "6.14",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "cpeApplicability": [
            {
               "nodes": [
                  {
                     "operator": "OR",
                     "negate": false,
                     "cpeMatch": [
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "6.13",
                           "versionEndExcluding": "6.13.6"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "6.13",
                           "versionEndExcluding": "6.14"
                        }
                     ]
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/5e79d26014f9386387575b9ed60d342057cee49b"
            },
            {
               "url": "https://git.kernel.org/stable/c/59f37036bb7ab3d554c24abc856aabca01126414"
            }
         ],
         "title": "btrfs: fix use-after-free on inode when scanning root during em shrinking",
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            "engine": "bippy-1.2.0"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2025-21879",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}