Description
Integer overflow in the strxfrm function in the GNU C Library (aka glibc or libc6) before 2.21 allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a long string, which triggers a stack-based buffer overflow.
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 | 2.21-1 | — |
| Debian 13 | glibc | 2.21-1 | — |
| Debian 12 | glibc | 2.21-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | glibc | 2.23-0ubuntu6 | USN-3239-1 |
| Ubuntu 14.04 LTS | eglibc | 2.19-0ubuntu6.10 | USN-3239-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | glibc | 2.11.3-17.110.40.1 | SUSE-SU-2022:14923-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Linux Enterprise Point of Sale 11 SP3 | glibc | 2.11.3-17.110.40.1 | SUSE-SU-2022:14923-1 |
Advisories 3
- USN-3239-1 eglibc, glibc vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- SUSE-SU-2022:14923-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-2008 GNU libc: mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2025
References
- [oss-security] 20170214 Re: Pending CVE requests for glibc mailing-list
- 72602 vdb-entry
- https://sourceware.org/bugzilla/show_bug.cgi?id=16009
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=0f9e585480ed
- [oss-security] 20150213 CVE Requests - glibc overflows (strxfrm) mailing-list
- [bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 mailing-list
- [bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 mailing-list