Description
Use-after-free vulnerability in the path_openat function in fs/namei.c in the Linux kernel 3.x and 4.x before 4.0.4 allows local users to cause a denial of service or possibly have unspecified other impact via O_TMPFILE filesystem operations that leverage a duplicate cleanup operation.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.0.4-1 | — |
| Debian 13 | linux | 4.0.4-1 | — |
| Debian 12 | linux | 4.0.4-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux | 3.13.0-58.97 | USN-2681-1 |
| Ubuntu 14.04 LTS | linux-lts-utopic | 3.16.0-43.58~14.04.1 | USN-2664-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-22.22~14.04.1 | USN-2665-1 |
Advisories 3
- USN-2681-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2664-1 linux-lts-utopic vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-2665-1 linux-lts-vivid vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
References
- https://source.android.com/security/bulletin/2017-01-01.html
- http://twitter.com/grsecurity/statuses/597127122910490624
- USN-2680-1 vendor-advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.4
- https://bugzilla.redhat.com/show_bug.cgi?id=1250047
- 76142 vdb-entry
- DSA-3329 vendor-advisory
- https://github.com/torvalds/linux/commit/f15133df088ecadd141ea1907f2c96df67c729f0
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f15133df088ecadd141ea1907f2c96df67c729f0
- USN-2681-1 vendor-advisory
- [oss-security] 20150801 CVE request: Use-after-free in path lookup in Linux 3.11-4.0 inclusive mailing-list