Description
Integer overflow in the vma_to_resize function in mm/mremap.c in the Linux kernel before 2.6.39 allows local users to cause a denial of service (BUG_ON and system crash) via a crafted mremap system call that expands a memory mapping.
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 6.0 | linux-2.6 | 2.6.32-35squeeze1 | DSA-2303-1 |
| Debian 5.0 | linux-2.6 | 2.6.26-26lenny4 | DSA-2310-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +14 | 2.6.32-131.17.1.el6 | RHSA-2011:1350 |
| RHEL 5 | kernel +11 | 2.6.18-274.7.1.el5 | RHSA-2011:1386 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +10 | 2.6.33.9-rt31.75.el6rt | RHSA-2011:1253 |
Advisories 5
- RHSA-2011:1386 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2011:1350 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2011:1253 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2303-1 linux-2.6 - several issues Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-2310-1 linux-2.6 - several issues Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://bugzilla.redhat.com/show_bug.cgi?id=716538
- https://github.com/torvalds/linux/commit/982134ba62618c2d69fbbbd166d0a11ee3b7e3d8
- [oss-security] 20110627 Re: CVE request: kernel: mm: avoid wrapping vm_pgoff in mremap() and stack expansions mailing-list
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=982134ba62618c2d69fbbbd166d0a11ee3b7e3d8
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39