Description
A flaw was found in GLib. The D-Bus client-side implementation of the DBUS_COOKIE_SHA1 SASL authentication mechanism does not validate the cookie_context parameter received from the server. A malicious D-Bus server can supply a cookie_context containing path traversal sequences, causing the client to read an arbitrary file and exfiltrate sensitive data by verifying guessed file contents against a generated hash.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GNOME | GLib | < 2.88.1 | 2.88.1 |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | — | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.12 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.13 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.14 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.15 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.22 | — | — |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | — | — |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | — | — |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.19 | — | — |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.20 | — | — |
| Red Hat | Red Hat AI Inference Server 3.2 | — | — |
| Red Hat | Red Hat AI Inference Server 3.5 | — | — |
| Red Hat | Red Hat Discovery 2 | — | — |
| Red Hat | Red Hat Enterprise Linux AI 3.5 | — | — |
| Red Hat | Red Hat OpenShift AI 3.0 | — | — |
| Red Hat | Red Hat OpenShift AI 3.2 | — | — |
| Red Hat | Red Hat OpenShift AI 3.4 | — | — |
| Red Hat | Red Hat OpenShift AI 3.5 | — | — |
| Red Hat | Red Hat Update Infrastructure 5 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Hardened Images | — | — |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — |
| Red Hat | Red Hat OpenShift Container Platform 5 | — | — |
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 | glib2.0 | 2.88.1-2 | — |
| Debian 13 | glib2.0 | 2.84.4-3~deb13u4 | — |
| Debian 12 | glib2.0 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | glib2.0 | 2.88.0-1ubuntu0.1 | USN-8794-1 |
| Ubuntu 25.10 | glib2.0 | No fix yet | — |
| Ubuntu 24.04 LTS | glib2.0 | 2.80.0-6ubuntu3.9 | USN-8794-1 |
| Ubuntu 22.04 LTS | glib2.0 | 2.72.4-0ubuntu2.10 | USN-8794-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | glib2.0 | 2.64.6-1~ubuntu20.04.9+esm2 | USN-8794-1 |
| Ubuntu Pro 18.04 LTS | glib2.0 | 2.56.4-0ubuntu0.18.04.9+esm6 | USN-8794-1 |
| Ubuntu Pro 16.04 LTS | glib2.0 | 2.48.2-0ubuntu4.8+esm6 | USN-8794-1 |
| Ubuntu Pro 14.04 LTS | glib2.0 | 2.40.2-0ubuntu1.1+esm8 | USN-8794-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | glib2 +4 | 2.80.4-12.el10_2.21 | RHSA-2026:57015 |
| RHEL 10 | mingw-glib2 +4 | 2.89.2-1.el10 | RHSA-2026:97163 |
| RHEL 9 | glib2 +4 | 2.68.4-19.el9_8.9 | RHSA-2026:55440 |
| RHEL 8 | glib2 +5 | 2.56.4-177.el8_10 | RHSA-2026:61766 |
| RHEL 8 | mingw-glib2 +4 | 2.70.1-9.el8_10 | RHSA-2026:49512 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | glib2 +4 | 2.80.4-4.el10_0.17 | RHSA-2026:65767 |
| RHEL 9.6 EUS | glib2 +4 | 2.68.4-16.el9_6.7 | RHSA-2026:65763 |
| RHEL 9.4 E4S | glib2 +3 | 2.68.4-14.el9_4.8 | RHSA-2026:65770 |
| RHEL 9.2 E4S | glib2 +3 | 2.68.4-7.el9_2.7 | RHSA-2026:65768 |
| RHEL 8.8 TUS | glib2 +3 | 2.56.4-165.el8_8.2 | RHSA-2026:65771 |
| RHEL 8.8 E4S | glib2 +3 | 2.56.4-165.el8_8.2 | RHSA-2026:65771 |
| RHEL 8.6 EUS Long Life | glib2 +3 | 2.56.4-158.el8_6.7 | RHSA-2026:65769 |
| RHEL 8.6 AUS | glib2 +3 | 2.56.4-158.el8_6.7 | RHSA-2026:65769 |
| RHEL 8.4 EUS Long Life | glib2 +3 | 2.56.4-10.el8_4.7 | RHSA-2026:65762 |
| RHEL 8.4 AUS | glib2 +3 | 2.56.4-10.el8_4.7 | RHSA-2026:65762 |
| RHEL 7 ELS | glib2 +5 | 2.56.1-13.el7_9.1 | RHSA-2026:65773 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | glib2 +4 | 2.80.4-12.el10_2.21 | ALSA-2026:57015 |
| AlmaLinux 9 | glib2 +4 | 2.68.4-19.el9_8.9 | ALSA-2026:55440 |
| AlmaLinux 8 | glib2 +5 | 2.56.4-177.el8_10 | ALSA-2026:61766 |
| AlmaLinux 8 | mingw32-glib2 +3 | 2.70.1-9.el8_10 | ALSA-2026:49512 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | glib2 | 2.80.4-12.el10_2.21 | RLSA-2026:57015 |
| Rocky Linux 10 | mingw32-glib2 +3 | 2.89.2-1.el10 | RLSA-2026:97163 |
| Rocky Linux 9 | glib2 | 2.68.4-19.el9_8.9 | RLSA-2026:55440 |
| Rocky Linux 8 | glib2 | 2.56.4-177.el8_10 | RLSA-2026:61766 |
| Rocky Linux 8 | mingw-glib2 | 2.70.1-9.el8_10 | RLSA-2026:49512 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | glib | 2.86.4-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | glib2 +4 | 2.82.2-770.amzn2023 | ALAS2023-2026-1942 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | glib | 2.78.6-11 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | glib2 +4 | 2.80.4-12.el10_2.21 | ELSA-2026-57015 |
| Oracle Linux 9 | glib2 +4 | 2.68.4-19.el9_8.9 | ELSA-2026-55440 |
| Oracle Linux 8 | mingw32-glib2 +3 | 2.70.1-9.el8_10 | ELSA-2026-49512 |
Advisories 31
- RHSA-2026:97163 Red Hat Security Advisory: mingw-glib2 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:61766 Red Hat Security Advisory: glib2 security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RLSA-2026:97163 Moderate: mingw-glib2 security, bug fix, and enhancement update Rocky Linux Security Advisories · Nov 13, 2026
- WID-SEC-2026-2866 Red Hat Enterprise Linux (glib2): Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- WID-SEC-2026-3595 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 2, 2026
- ALSA-2026:55440 Moderate: glib2 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:57015 Moderate: glib2 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:61766 Moderate: glib2 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:49512 Important: mingw-glib2 security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2026-3623 IBM DataPower Gateway: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- RHSA-2026:65773 Red Hat Security Advisory: glib2 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:65770 Red Hat Security Advisory: glib2 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:65771 Red Hat Security Advisory: glib2 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:65769 Red Hat Security Advisory: glib2 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:65768 Red Hat Security Advisory: glib2 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:65767 Red Hat Security Advisory: glib2 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:65763 Red Hat Security Advisory: glib2 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:65762 Red Hat Security Advisory: glib2 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:57015 Red Hat Security Advisory: glib2 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:55440 Red Hat Security Advisory: glib2 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:49512 Red Hat Security Advisory: mingw-glib2 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- NCSC-2026-0431 Kwetsbaarheden verholpen in IBM DataPower Gateway en onderliggende componenten NCSC-NL (Netherlands) · Oct 16, 2026
- USN-8794-1 glib2.0 vulnerabilities Ubuntu Security Notices (USN) · Sep 22, 2026
- RLSA-2026:61766 Moderate: glib2 security update Rocky Linux Security Advisories · Sep 1, 2026
- RLSA-2026:57015 Moderate: glib2 security update Rocky Linux Security Advisories · Aug 20, 2026
- ELSA-2026-57015 Moderate: glib2 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Aug 19, 2026
- RLSA-2026:55440 Moderate: glib2 security update Rocky Linux Security Advisories · Aug 17, 2026
- ELSA-2026-55440 Moderate: glib2 security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 17, 2026
- RLSA-2026:49512 Important: mingw-glib2 security update Rocky Linux Security Advisories · Aug 4, 2026
- ELSA-2026-49512 Important: mingw-glib2 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 4, 2026
- ALAS2023-2026-1942 Important: glib2 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jul 20, 2026
References
- RHSA-2026:49512 vendor-advisory
- RHSA-2026:55440 vendor-advisory
- RHSA-2026:57015 vendor-advisory
- RHSA-2026:58981 vendor-advisory
- RHSA-2026:61766 vendor-advisory
- RHSA-2026:61783 vendor-advisory
- RHSA-2026:63135 vendor-advisory
- RHSA-2026:63138 vendor-advisory
- RHSA-2026:63140 vendor-advisory
- RHSA-2026:65762 vendor-advisory
- RHSA-2026:65763 vendor-advisory
- RHSA-2026:65767 vendor-advisory
- RHSA-2026:65768 vendor-advisory
- RHSA-2026:65769 vendor-advisory
- RHSA-2026:65770 vendor-advisory
- RHSA-2026:65771 vendor-advisory
- RHSA-2026:65773 vendor-advisory
- RHSA-2026:66018 vendor-advisory
- RHSA-2026:66357 vendor-advisory
- RHSA-2026:70646 vendor-advisory
- RHSA-2026:72394 vendor-advisory
- RHSA-2026:72395 vendor-advisory
- RHSA-2026:72399 vendor-advisory
- RHSA-2026:72470 vendor-advisory
- RHSA-2026:72475 vendor-advisory
- RHSA-2026:72476 vendor-advisory
- RHSA-2026:72502 vendor-advisory
- RHSA-2026:73859 vendor-advisory
- RHSA-2026:73866 vendor-advisory
- RHSA-2026:73909 vendor-advisory
- RHSA-2026:73929 vendor-advisory
- RHSA-2026:73930 vendor-advisory
- RHSA-2026:73959 vendor-advisory
- RHSA-2026:73960 vendor-advisory
- RHSA-2026:73961 vendor-advisory
- RHSA-2026:73962 vendor-advisory
- RHSA-2026:74458 vendor-advisory
- RHSA-2026:74459 vendor-advisory
- RHSA-2026:74460 vendor-advisory
- RHSA-2026:74461 vendor-advisory
- RHSA-2026:74462 vendor-advisory
- RHSA-2026:74463 vendor-advisory
- RHSA-2026:74674 vendor-advisory
- RHSA-2026:74677 vendor-advisory
- RHSA-2026:74678 vendor-advisory
- RHSA-2026:74679 vendor-advisory
- RHSA-2026:74681 vendor-advisory
- RHSA-2026:74683 vendor-advisory
- RHSA-2026:74685 vendor-advisory
- RHSA-2026:74687 vendor-advisory
- RHSA-2026:74688 vendor-advisory
- RHSA-2026:74771 vendor-advisory
- RHSA-2026:75652 vendor-advisory
- RHSA-2026:75654 vendor-advisory
- RHSA-2026:75655 vendor-advisory
- RHSA-2026:75657 vendor-advisory
- RHSA-2026:75658 vendor-advisory
- RHSA-2026:75659 vendor-advisory
- RHSA-2026:75660 vendor-advisory
- RHSA-2026:76042 vendor-advisory