Description
arch/s390/kernel/head64.S in the Linux kernel before 3.13.5 on the s390 platform does not properly handle attempted use of the linkage stack, which allows local users to cause a denial of service (system crash) by executing a crafted instruction.
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 | 3.13.5-1 | — |
| Debian 13 | linux | 3.13.5-1 | — |
| Debian 12 | linux | 3.13.5-1 | — |
| Debian 6.0 | linux-2.6 | 2.6.32-48squeeze5 | DSA-2906-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +16 | 2.6.32-431.20.3.el6 | RHSA-2014:0771 |
Advisories 2
- RHSA-2014:0771 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2906-1 linux-2.6 - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- 65700 vdb-entry
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8d7f6690cedb83456edd41c9bd583783f0703bf0
- 59262 third-party-advisory
- 59309 third-party-advisory
- http://linux.oracle.com/errata/ELSA-2014-0771.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1067558
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.13.5
- https://github.com/torvalds/linux/commit/8d7f6690cedb83456edd41c9bd583783f0703bf0
- [oss-security] 20140220 Re: CVE Request: Linux kernel: s390: crash due to linkage stack instruction mailing-list