Description
The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.2 and newer fail to enforce the caller-supplied buffer length, and can result in an out-of-bounds write when printing TSIG records.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The GNU C Library | glibc | 2.2 | — |
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 | 2.43-3 | — |
| Debian 13 | glibc | No fix yet | — |
| Debian 12 | glibc | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | glibc | 2.43-2ubuntu2.3 | USN-8611-1 |
| Ubuntu 25.10 | glibc | No fix yet | — |
| Ubuntu 24.04 LTS | glibc | 2.39-0ubuntu8.8 | USN-8611-1 |
| Ubuntu 22.04 LTS | glibc | 2.35-0ubuntu3.14 | USN-8611-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | glibc | No fix yet | — |
| Ubuntu Pro 18.04 LTS | glibc | No fix yet | — |
| Ubuntu Pro 16.04 LTS | glibc | No fix yet | — |
| Ubuntu Pro 14.04 LTS | eglibc | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | glibc +220 | 2.39-128.el10_2 | RHSA-2026:42694 |
| RHEL 9 | nscd +214 | 2.34-274.el9_8 | RHSA-2026:42952 |
| RHEL 8 | nscd +213 | 2.28-251.el8_10.40 | RHSA-2026:42733 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | glibc +223 | 2.42-12.hum1 | RHSA-2026:12740 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | glibc +220 | 2.39-128.el10_2.alma.1 | ALSA-2026:42694 |
| AlmaLinux 9 | nscd +214 | 2.34-274.el9_8 | ALSA-2026:42952 |
| AlmaLinux 8 | nscd +213 | 2.28-251.el8_10.40 | ALSA-2026:42733 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | glibc | 2.39-128.el10_2 | RLSA-2026:42694 |
| Rocky Linux 9 | glibc | 2.34-274.el9_8 | RLSA-2026:42952 |
| Rocky Linux 8 | glibc | 2.28-251.el8_10.40 | RLSA-2026:42733 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | glibc | 2.38-150600.14.52.1 | SUSE-SU-2026:3030-1 |
| SLES 15 SP6 | glibc | 2.38-150600.14.52.1 | SUSE-SU-2026:3030-1 |
| SLES 15 SP5 | glibc | 2.31-150300.104.1 | SUSE-SU-2026:3029-1 |
| SLES 15 SP4 | glibc | 2.31-150300.104.1 | SUSE-SU-2026:3029-1 |
| SLES 12 SP5 | glibc | 2.22-114.49.1 | SUSE-SU-2026:2987-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | glibc | 2.38-150600.14.52.1 | SUSE-SU-2026:3030-1 |
| SLES for SAP 15 SP5 | glibc | 2.31-150300.104.1 | SUSE-SU-2026:3029-1 |
| SLES for SAP 15 SP4 | glibc | 2.31-150300.104.1 | SUSE-SU-2026:3029-1 |
| SLE Micro 6.2 | glibc | 2.40-160000.6.1 | SUSE-SU-2026:22538-1 |
| SLE Micro 6.1 | glibc | 2.38-slfo.1.1_9.1 | SUSE-SU-2026:22453-1 |
| SLE Micro 6.0 | glibc | 2.38-14.1 | SUSE-SU-2026:22523-1 |
| SLE Micro 5.5 | glibc | 2.31-150300.104.1 | SUSE-SU-2026:3029-1 |
| SLE Micro 5.4 | glibc | 2.31-150300.104.1 | SUSE-SU-2026:3029-1 |
| SLE Micro 5.3 | glibc | 2.31-150300.104.1 | SUSE-SU-2026:3029-1 |
| SLE HPC 15 SP5 | glibc | 2.31-150300.104.1 | SUSE-SU-2026:3029-1 |
| SLE HPC 15 SP4 | glibc | 2.31-150300.104.1 | SUSE-SU-2026:3029-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glibc | 2.43-4.1 | openSUSE-SU-2026:11140-1 |
| openSUSE Leap 16.0 | glibc +4 | 2.40-160000.6.1 | openSUSE-SU-2026:21228-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | glibc | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | glibc +220 | 2.39-128.0.1.el10_2 | ELSA-2026-42694 |
| Oracle Linux 9 | nscd +214 | 2.34-274.0.1.el9_8 | ELSA-2026-42952 |
| Oracle Linux 8 | nscd +213 | 2.28-251.0.4.el8_10.40 | ELSA-2026-42733 |
Advisories 26
- WID-SEC-2026-1300 GNU libc: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 9, 2026
- ALSA-2026:42952 Moderate: glibc security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:42694 Moderate: glibc security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:42733 Moderate: glibc security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:42952 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:42733 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:42694 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:12740 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- SSA-082556 SSA-082556: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.5 Siemens ProductCERT · Oct 13, 2026
- WID-SEC-2026-3043 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- VDE-2026-088 METTLER TOLEDO: LabX Standard and Enterprise Report on External Component Analysis - v21.4 CERT@VDE · Sep 10, 2026
- ELSA-2026-42694 Moderate: glibc security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Sep 7, 2026
- USN-8611-1 glibc vulnerabilities Ubuntu Security Notices (USN) · Jul 27, 2026
- RLSA-2026:42952 Moderate: glibc security update Rocky Linux Security Advisories · Jul 23, 2026
- ELSA-2026-42733 Moderate: glibc security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 23, 2026
- RLSA-2026:42694 Moderate: glibc security update Rocky Linux Security Advisories · Jul 22, 2026
- RLSA-2026:42733 Moderate: glibc security update Rocky Linux Security Advisories · Jul 22, 2026
- ELSA-2026-42952 Moderate: glibc security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 22, 2026
- SUSE-SU-2026:3030-1 Security update for glibc SUSE / openSUSE Security Updates · Jul 16, 2026
- SUSE-SU-2026:3029-1 Security update for glibc SUSE / openSUSE Security Updates · Jul 16, 2026
- SUSE-SU-2026:2987-1 Security update for glibc SUSE / openSUSE Security Updates · Jul 15, 2026
- SUSE-SU-2026:22538-1 Security update for glibc SUSE / openSUSE Security Updates · Jul 14, 2026
- SUSE-SU-2026:22523-1 Security update for glibc SUSE / openSUSE Security Updates · Jul 9, 2026
- openSUSE-SU-2026:21228-1 Security update for glibc SUSE / openSUSE Security Updates · Jul 5, 2026
- SUSE-SU-2026:22453-1 Security update for glibc SUSE / openSUSE Security Updates · Jul 4, 2026
- openSUSE-SU-2026:11140-1 glibc-2.43-4.1 on GA media SUSE / openSUSE Security Updates · Jun 29, 2026