Description
The do_double_fault function in arch/x86/kernel/traps.c in the Linux kernel through 3.17.4 does not properly handle faults associated with the Stack Segment (SS) segment register, which allows local users to cause a denial of service (panic) via a modify_ldt system call, as demonstrated by sigreturn_32 in the linux-clock-tests test suite.
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 | 3.16.7-ckt2-1 | — |
| Debian 13 | linux | 3.16.7-ckt2-1 | — |
| Debian 12 | linux | 3.16.7-ckt2-1 | — |
| Debian 7 | linux | 3.2.63-2+deb7u2 | DSA-3093-1 |
| Debian 6.0 | linux-2.6 | 2.6.32-48squeeze9 | DLA-103-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-riscv +6 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +4 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +3 | No fix yet | — |
| Ubuntu 14.04 LTS | linux | 3.13.0-43.72 | USN-2446-1 |
| Ubuntu 14.04 LTS | linux-lts-utopic | 3.16.0-28.37~14.04.1 | USN-2447-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-55.1.2.el6uek | 0.4.3-4.el6 | ELSA-2014-3106 |
| Oracle Linux 7 | dtrace-modules-3.8.13-55.1.2.el7uek | 0.4.3-4.el7 | ELSA-2014-3106 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-55.1.2.el7uek | ELSA-2014-3106 |
Advisories 5
- USN-2446-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3093-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-103-1 linux-2.6 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2447-1 linux-lts-utopic vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- ELSA-2014-3106 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 19, 2014
References
- SUSE-SU-2015:0736 vendor-advisory
- DSA-3093 vendor-advisory
- [oss-security] 20141126 Re: CVE Request: Linux kernel LDT handling bugs mailing-list
- openSUSE-SU-2015:0566 vendor-advisory
- https://github.com/torvalds/linux/commit/6f442be2fb22be02cafa606f1769fa1e6f894441
- 62336 third-party-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=6f442be2fb22be02cafa606f1769fa1e6f894441
- SUSE-SU-2015:0812 vendor-advisory