Description
The NFSv4 implementation in the Linux kernel before 3.2.2 does not properly handle bitmap sizes in GETACL replies, which allows remote NFS servers to cause a denial of service (OOPS) by sending an excessive number of bitmap words.
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 | 3.2.9-1 | — |
| Debian 13 | linux | 3.2.9-1 | — |
| Debian 12 | linux | 3.2.9-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +14 | 2.6.32-279.el6 | RHSA-2012:0862 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6.2 EUS | perf +15 | 2.6.32-220.30.1.el6 | RHSA-2012:1541 |
| Red Hat MRG 2 | kernel-rt +10 | 3.0.18-rt34.53.el6rt | RHSA-2012:0333 |
Advisories 3
- RHSA-2012:1541 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2012:0333 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2012:0862 Red Hat Security Advisory: Red Hat Enterprise Linux 6 kernel security, bug fix and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- SUSE-SU-2012:0554 vendor-advisory
- 48898 third-party-advisory
- [oss-security] 20111111 Re: CVE Request -- kernel: nfs4_getfacl decoding kernel oops mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=747106
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=bf118a342f10dafe44b14451a1392c3254629a1f
- RHSA-2012:1541 vendor-advisory
- FEDORA-2012-8359 vendor-advisory
- openSUSE-SU-2013:0925 vendor-advisory
- RHSA-2012:0862 vendor-advisory
- https://github.com/torvalds/linux/commit/bf118a342f10dafe44b14451a1392c3254629a1f
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2