Description
Buffer overflow in the extend_buffers function in the regular expression matcher (posix/regexec.c) in glibc, possibly 2.17 and earlier, allows context-dependent attackers to cause a denial of service (memory corruption and crash) via crafted multibyte characters.
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 | glibc | 2.17-2 | — |
| Debian 13 | glibc | 2.17-2 | — |
| Debian 12 | glibc | 2.17-2 | — |
| Debian 6.0 | eglibc | 2.11.3-4+deb6u5 | DLA-165-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | nscd +7 | 2.12-1.132.el6 | RHSA-2013:1605 |
| RHEL 5 | nscd +6 | 2.5-107.el5_9.4 | RHSA-2013:0769 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glibc | 2.24-2.3 | openSUSE-SU-2024:10154-1 |
Advisories 4
- RHSA-2013:1605 Red Hat Security Advisory: glibc security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DLA-165-1 eglibc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10154-1 glibc-2.24-2.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2013:0769 Red Hat Security Advisory: glibc security and bug fix update Red Hat Security Advisories (RHSA) · Nov 22, 2025
References
- http://www.vmware.com/security/advisories/VMSA-2014-0008.html
- glibc-extendbuffers-dos(81707) vdb-entry
- RHSA-2013:1605 vendor-advisory
- 55113 third-party-advisory
- USN-1991-1 vendor-advisory
- 57638 vdb-entry
- 89747 vdb-entry
- 51951 third-party-advisory
- 1028063 vdb-entry
- [oss-security] 20130130 Re: CVE Request -- glibc: DoS due to a buffer overrun in regexp matcher by processing multibyte characters mailing-list
- GLSA-201503-04 vendor-advisory
- [libc-alpha] 20130129 [PATCH] Fix buffer overrun in regexp matcher mailing-list
- RHSA-2013:0769 vendor-advisory
- MDVSA-2013:163 vendor-advisory
- http://sourceware.org/bugzilla/show_bug.cgi?id=15078