Description
nfsd in the Linux kernel through 4.6.3 allows local users to bypass intended file-permission restrictions by setting a POSIX ACL, related to nfs2acl.c, nfs3acl.c, and nfs4acl.c.
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 | 4.6.2-2 | — |
| Debian 13 | linux | 4.6.2-2 | — |
| Debian 12 | linux | 4.6.2-2 | — |
| Debian 8 | linux | 3.16.7-ckt25-2+deb8u2 | DSA-3607-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux | 4.4.0-36.55 | USN-3070-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1021.27 | USN-3070-2 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1024.27 | USN-3070-3 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-66.74~14.04.1 | USN-3053-1 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-36.55~14.04.1 | USN-3070-4 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | kernel-source | 4.8.13-1.1 | openSUSE-SU-2024:10128-1 |
Advisories 7
- USN-3070-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3607-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3070-2 linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3070-3 linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3070-4 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3053-1 linux-lts-vivid vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2024:10128-1 kernel-debug-4.8.13-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- USN-3070-1 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1350845
- USN-3053-1 vendor-advisory
- [oss-security] 20160625 Linux CVE-2016-1237: nfsd: any user can set a file's ACL over NFS and grant access to it mailing-list
- USN-3070-3 vendor-advisory
- DSA-3607 vendor-advisory
- USN-3070-2 vendor-advisory
- https://github.com/torvalds/linux/commit/999653786df6954a31044528ac3f7a5dadca08f4
- 91456 vdb-entry
- USN-3070-4 vendor-advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=999653786df6954a31044528ac3f7a5dadca08f4