Description
The futex_wait_requeue_pi function in kernel/futex.c in the Linux kernel before 3.5.1 does not ensure that calls have two different futex addresses, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted FUTEX_WAIT_REQUEUE_PI command.
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 | 3.2.29-1 | — |
| Debian 13 | linux | 3.2.29-1 | — |
| Debian 12 | linux | 3.2.29-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +16 | 2.6.32-431.23.3.el6 | RHSA-2014:0981 |
Advisories 1
- RHSA-2014:0981 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=6f7b0a2a5c0fb03be7c25bd1745baa50582348ef
- https://github.com/torvalds/linux/commit/6f7b0a2a5c0fb03be7c25bd1745baa50582348ef
- https://bugzilla.redhat.com/show_bug.cgi?id=1097746
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.5.1
- [oss-security] 20140514 Re: CVE request Linux kernel: forbid uaddr == uaddr2 in futex_wait_requeue_pi() to avoid null dereference mailing-list