Description
The try_to_unmap_cluster function in mm/rmap.c in the Linux kernel before 3.14.3 does not properly consider which pages must be locked, which allows local users to cause a denial of service (system crash) by triggering a memory-usage pattern that requires removal of page-table mappings.
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 | 3.14.4-1 | — |
| Debian 13 | linux | 3.14.4-1 | — |
| Debian 12 | linux | 3.14.4-1 | — |
| Debian 7 | linux | 3.2.57-3+deb7u1 | DSA-2926-1 |
| Debian 6.0 | linux-2.6 | 2.6.32-48squeeze8 | DLA-0015-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux | 3.13.0-29.53 | USN-2240-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +16 | 2.6.32-504.el6 | RHSA-2014:1392 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +10 | 3.10.33-rt32.34.el6rt | RHSA-2014:0557 |
Advisories 5
- RHSA-2014:0557 Red Hat Security Advisory: kernel-rt security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:1392 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2240-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-2926-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-0015-1 linux-2.6 - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- 67162 vdb-entry
- [oss-security] 20140430 Re: CVE request Linux kernel: mm: try_to_unmap_cluster() should lock_page() before mlocking mailing-list
- https://github.com/torvalds/linux/commit/57e68e9cd65b4b8eb4045a1e0d0746458502554c
- USN-2240-1 vendor-advisory
- 59386 third-party-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=57e68e9cd65b4b8eb4045a1e0d0746458502554c
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.14.3
- 59599 third-party-advisory
- DSA-2926 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1093076