CVE-2026-68149
fs: preserve ACL_DONT_CACHE state in forget_cached_acl()
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: fs: preserve ACL_DONT_CACHE state in forget_cached_acl() The ACL_DONT_CACHE state is meant to be a constant state for the inode for filesystems that want to opt out of posix acl caching. Commit facd61053cff1 ("fuse: fixes after adapting to new posix acl api") used this facility to opt out of posix acl caching for fuse inodes with fuse server that does not negotiate FUSE_POSIX_ACL (fc->posix_acl). The commit also takes care to gate the forget_all_cached_acls() call in fuse_set_acl() on fc->posix_acl because there is no need for it, but there are other placed in fuse code which call forget_all_cached_acls() unconditional to fc->posix_acl and those cause the loss of the ACL_DONT_CACHE state. This is not only a functional bug. Properly timed, a get_acl() from this fuse filesystem can return a stale cached value, as was observed in tests, because set_acl() does not invalidate the unintentional acl cache. We could fix this in fuse, but it actually makes no sense for the vfs helper forget_cached_acl() to invalidate the ACL_DONT_CACHE state, so let it not do that to fix fuse and future users of ACL_DONT_CACHE.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.4 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N |
| NVDNVD · Received | 3.1 | High8.4 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.14% · top 97% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.4.
Weakness
Affected products
- affected facd61053cff100973921d4d45d47cf53c747ec6 – < b98fad81f1202b0eb26aacf3ff4cc7a21ed3b5bf
- affected facd61053cff100973921d4d45d47cf53c747ec6 – < 834ddf899484a2f23129080e8773bc04f4691d07
- affected facd61053cff100973921d4d45d47cf53c747ec6 – < a019b074903b3ad0a9726087efd0e8291452023b
- affected facd61053cff100973921d4d45d47cf53c747ec6 – < ca03a7984a34f48085fd013e0d2cf4e6420b4acf
- affected facd61053cff100973921d4d45d47cf53c747ec6 – < 4b9a5458d02e214ef2b384124ca626e3e381d778
- affected 6.2
- unaffected < 6.2
- unaffected 6.6.148 – ≤ 6.6.*
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References (5)
- https://git.kernel.org/stable/c/b98fad81f1202b0eb26aacf3ff4cc7a21ed3b5bf (opens in a new tab)
- https://git.kernel.org/stable/c/834ddf899484a2f23129080e8773bc04f4691d07 (opens in a new tab)
- https://git.kernel.org/stable/c/a019b074903b3ad0a9726087efd0e8291452023b (opens in a new tab)
- https://git.kernel.org/stable/c/ca03a7984a34f48085fd013e0d2cf4e6420b4acf (opens in a new tab)
- https://git.kernel.org/stable/c/4b9a5458d02e214ef2b384124ca626e3e381d778 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2026-68149)Record last updated .