Description
The __nfs4_get_acl_uncached function in fs/nfs/nfs4proc.c in the NFSv4 implementation in the Linux kernel before 3.3.2 uses an incorrect length variable during a copy operation, which allows remote NFS servers to cause a denial of service (OOPS) by sending an excessive number of bitmap words in an FATTR4_ACL reply. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-4131.
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 | 3.2.19-1 | — |
| Debian 13 | linux | 3.2.19-1 | — |
| Debian 12 | linux | 3.2.19-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +15 | 2.6.32-279.19.1.el6 | RHSA-2012:1580 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +11 | 3.6.11-rt28.20.el6rt | RHSA-2013:0566 |
Advisories 2
- RHSA-2013:0566 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2012:1580 Red Hat Security Advisory: kernel security, bug fix and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
References
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.2
- RHSA-2012:1580 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=822869
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=20e0fa98b751facf9a1101edaefbc19c82616a68
- [oss-security] 20120518 Re: CVE Request -- kernel: incomplete fix for CVE-2011-4131 mailing-list
- https://github.com/torvalds/linux/commit/20e0fa98b751facf9a1101edaefbc19c82616a68
- HPSBGN02970 vendor-advisory