Description
In the GNU C Library (aka glibc or libc6) through 2.29, proceed_next_node in posix/regexec.c has a heap-based buffer over-read via an attempted case-insensitive regular-expression match.
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 | 2.28-9 | — |
| Debian 13 | glibc | 2.28-9 | — |
| Debian 12 | glibc | 2.28-9 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | glibc | 2.27-3ubuntu1.2 | USN-4416-1 |
| Ubuntu 16.04 LTS | glibc | 2.23-0ubuntu11.2 | USN-4416-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | nscd +212 | 2.28-151.el8 | RHSA-2021:1585 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | nss_hesiod +3 | 2.28-151.el8 | ALSA-2021:1585 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | glibc | 2.28-151.el8 | RLSA-2021:1585 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | glibc | 2.26-13.24.1 | SUSE-SU-2019:1877-1 |
| SLES 15 | glibc | 2.26-13.24.1 | SUSE-SU-2019:1877-1 |
| SLES 12 SP4 | glibc | 2.22-100.8.1 | SUSE-SU-2019:1102-1 |
| SLES 12 SP3 | glibc | 2.22-62.22.5 | SUSE-SU-2019:1958-2, SUSE-SU-2019:1958-1 |
| SLES 12 SP2 | glibc | 2.22-62.22.5 | SUSE-SU-2019:1958-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | glibc | 2.11.3-17.110.33.1 | SUSE-SU-2019:14084-1 |
| SLES for SAP 12 SP4 | glibc | 2.22-100.8.1 | SUSE-SU-2019:1102-1 |
| SLES for SAP 12 SP3 | glibc | 2.22-62.22.5 | SUSE-SU-2019:1958-1 |
| SLES for SAP 12 SP2 | glibc | 2.22-62.22.5 | SUSE-SU-2019:1958-1 |
| SUSE OpenStack Cloud Crowbar 8 | glibc | 2.22-62.22.5 | SUSE-SU-2019:1958-2 |
| SUSE OpenStack Cloud 8 | glibc | 2.22-62.22.5 | SUSE-SU-2019:1958-1 |
| SUSE OpenStack Cloud 7 | glibc | 2.22-62.22.5 | SUSE-SU-2019:1958-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | glibc | 2.11.3-17.110.33.1 | SUSE-SU-2019:14084-1 |
| SUSE HPE Helion OpenStack 8 | glibc | 2.22-62.22.5 | SUSE-SU-2019:1958-2 |
| SUSE Enterprise Storage 5 | glibc | 2.22-62.22.5 | SUSE-SU-2019:1958-2, SUSE-SU-2019:1958-1 |
| SUSE Enterprise Storage 4 | glibc | 2.22-62.22.5 | SUSE-SU-2019:1958-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glibc | 2.34-1.2 | openSUSE-SU-2024:10792-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | nscd +199 | 2.26-47.amzn2 | ALAS2-2021-1656 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | nscd +211 | 2.28-151.0.1.el8 | ELSA-2021-1585 |
Advisories 15
- ALSA-2021:1585 Moderate: glibc security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:1585 Red Hat Security Advisory: glibc security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- WID-SEC-2025-0227 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2026
- USN-4416-1 glibc vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- RLSA-2021:1585 Moderate: glibc security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:10792-1 glibc-2.34-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14084-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1102-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1958-2 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1877-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- SUSE-SU-2019:1958-1 Security update for glibc SUSE / openSUSE Security Updates · May 2, 2025
- ALAS2-2021-1656 Moderate: glibc security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 22, 2021
- ELSA-2021-1585 Moderate: glibc security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 25, 2021
References
- 107160 vdb-entry
- GLSA-202006-04 vendor-advisory
- USN-4416-1 vendor-advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10278
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Ba=commit%3Bh=583dd860d5b833037175247230a328f0050dbfe9
- https://security.netapp.com/advisory/ntap-20190315-0002/
- https://sourceware.org/bugzilla/show_bug.cgi?id=24114
- https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34142
- https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34140
- https://support.f5.com/csp/article/K54823184