Description
The task_show_regs function in arch/s390/kernel/traps.c in the Linux kernel before 2.6.38-rc4-next-20110216 on the s390 platform allows local users to obtain the values of the registers of an arbitrary process by reading a status file under /proc/.
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 5.0 | linux-2.6 | 2.6.26-26lenny3 | DSA-2264-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +13 | 2.6.32-71.24.1.el6 | RHSA-2011:0421 |
| RHEL 5 | kernel +11 | 2.6.18-238.9.1.el5 | RHSA-2011:0429 |
Advisories 3
- RHSA-2011:0421 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2264-1 linux-2.6 - several issues Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2011:0429 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jan 14, 2026
References
- 20111013 VMSA-2011-0012 VMware ESXi and ESX updates to third party libraries and ESX Service Console mailing-list
- 46397 third-party-advisory
- http://www.kernel.org/pub/linux/kernel/v2.6/next/patch-v2.6.38-rc4-next-20110216.bz2
- https://bugzilla.redhat.com/show_bug.cgi?id=677850
- http://www.vmware.com/security/advisories/VMSA-2011-0012.html
- [oss-security] 20110216 CVE request - kernel: s390 task_show_regs infoleak mailing-list
- [oss-security] 20110216 Re: CVE request - kernel: s390 task_show_regs infoleak mailing-list
- 46421 vdb-entry
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=261cd298a8c363d7985e3482946edb4bfedacf98
- kernel-taskshowregs-info-disclosure(65464) vdb-entry