Description
A heap bufferflow in pcfReadFont() due to missing glyph bounds checking in libXfont2 before 2.0.8 allows attackers authenticated as X client to execute code within the X server.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| X.Org | libXfont2 | < 2.0.8 | 2.0.8 |
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 | libxfont | 1:2.0.8-1 | — |
| Debian 13 | libxfont | 1:2.0.6-1+deb13u1 | — |
| Debian 12 | libxfont | 1:2.0.6-1+deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | libxfont | 1:2.0.6-2ubuntu0.2 | USN-8560-1 |
| Ubuntu 25.10 | libxfont | No fix yet | — |
| Ubuntu 24.04 LTS | libxfont | 1:2.0.6-1+deb13u1build0.24.04.2 | USN-8560-1 |
| Ubuntu 22.04 LTS | libxfont | 1:2.0.5-1ubuntu0.2 | USN-8560-1 |
| Ubuntu 16.04 LTS | libxfont2 | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | libxfont | 1:2.0.3-1ubuntu0.20.04.1~esm2 | USN-8560-1 |
| Ubuntu Pro 18.04 LTS | libxfont | 1:2.0.3-1ubuntu0.1~esm2 | USN-8560-1 |
| Ubuntu Pro 16.04 LTS | libxfont | 1:1.5.1-1ubuntu0.16.04.4+esm2 | USN-8560-1 |
| Ubuntu Pro 14.04 LTS | libxfont | 1:1.4.7-1ubuntu0.4+esm2 | USN-8560-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | libXfont2 +1 | 2.0.6-5.el10_2.1 | RHSA-2026:47079 |
| RHEL 9 | libXfont2 +1 | 2.0.3-12.el9_8.1 | RHSA-2026:47084 |
| RHEL 8 | libXfont2 +1 | 2.0.3-2.el8_10.1 | RHSA-2026:47103 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | libXfont2 +1 | 2.0.6-5.el10_0.1 | RHSA-2026:51061 |
| RHEL 9.6 EUS | libXfont2 +1 | 2.0.3-12.el9_6.1 | RHSA-2026:51059 |
| RHEL 9.4 E4S | libXfont2 | 2.0.3-12.el9_4.1 | RHSA-2026:51058 |
| RHEL 9.2 E4S | libXfont2 | 2.0.3-12.el9_2.1 | RHSA-2026:51062 |
| RHEL 8.8 TUS | libXfont2 | 2.0.3-2.el8_8.1 | RHSA-2026:51067 |
| RHEL 8.8 E4S | libXfont2 | 2.0.3-2.el8_8.1 | RHSA-2026:51067 |
| RHEL 8.6 EUS Long Life | libXfont2 | 2.0.3-2.el8_6.1 | RHSA-2026:51066 |
| RHEL 8.6 AUS | libXfont2 | 2.0.3-2.el8_6.1 | RHSA-2026:51066 |
| RHEL 8.4 EUS Long Life | libXfont2 | 2.0.3-2.el8_4.1 | RHSA-2026:51060 |
| RHEL 8.4 AUS | libXfont2 | 2.0.3-2.el8_4.1 | RHSA-2026:51060 |
| RHEL 7 ELS | libXfont2 +1 | 2.0.3-2.el7_9 | RHSA-2026:51063 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | libXfont2 +1 | 2.0.6-5.el10_2.1 | ALSA-2026:47079 |
| AlmaLinux 9 | libXfont2 +1 | 2.0.3-12.el9_8.1 | ALSA-2026:47084 |
| AlmaLinux 8 | libXfont2 +1 | 2.0.3-2.el8_10.1 | ALSA-2026:47103 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | libXfont2 | 2.0.6-5.el10_2.1 | RLSA-2026:47079 |
| Rocky Linux 9 | libXfont2 | 2.0.3-12.el9_8.1 | RLSA-2026:47084 |
| Rocky Linux 8 | libXfont2 | 2.0.3-2.el8_10.1 | RLSA-2026:47103 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | libXfont2 | 2.0.3-150000.3.3.1 | SUSE-SU-2026:2794-1 |
| SLES 15 SP6 | libXfont2 | 2.0.3-150000.3.3.1 | SUSE-SU-2026:2794-1 |
| SLES 15 SP5 | libXfont2 | 2.0.3-150000.3.3.1 | SUSE-SU-2026:2794-1 |
| SLES 15 SP4 | libXfont2 | 2.0.3-150000.3.3.1 | SUSE-SU-2026:2794-1 |
| SLES 12 SP5 | libXfont2 | 2.0.3-3.3.1 | SUSE-SU-2026:2793-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | libXfont2 | 2.0.7-160000.4.1 | SUSE-SU-2026:22614-1 |
| SLES for SAP 15 SP6 | libXfont2 | 2.0.3-150000.3.3.1 | SUSE-SU-2026:2794-1 |
| SLES for SAP 15 SP5 | libXfont2 | 2.0.3-150000.3.3.1 | SUSE-SU-2026:2794-1 |
| SLES for SAP 15 SP4 | libXfont2 | 2.0.3-150000.3.3.1 | SUSE-SU-2026:2794-1 |
| SLES 16.0 | libXfont2 | 2.0.7-160000.4.1 | SUSE-SU-2026:22614-1 |
| SLE HPC 15 SP5 | libXfont2 | 2.0.3-150000.3.3.1 | SUSE-SU-2026:2794-1 |
| SLE HPC 15 SP4 | libXfont2 | 2.0.3-150000.3.3.1 | SUSE-SU-2026:2794-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libXfont2 | 2.0.7-2.1 | openSUSE-SU-2026:11233-1 |
| openSUSE Leap 16.0 | libXfont2 | 2.0.7-160000.4.1 | openSUSE-SU-2026:21284-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libxfont2 | 2.0.8-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | libXfont2 +1 | 2.0.7-1.amzn2023.0.2 | ALAS2023-2026-1967 |
| Amazon Linux 2 | libXfont +1 | 1.5.4-1.amzn2.0.1 | ALAS2-2026-3815 |
| Amazon Linux 2 | libXfont2 +1 | 2.0.3-1.amzn2.0.1 | ALAS2-2026-3814 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libXfont2 | 2.0.8-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | libXfont2 +1 | 2.0.6-5.el10_2.1 | ELSA-2026-47079 |
| Oracle Linux 9 | libXfont2 +1 | 2.0.3-12.el9_8.1 | ELSA-2026-47084 |
| Oracle Linux 8 | libXfont2 +1 | 2.0.3-2.el8_10.1 | ELSA-2026-47103 |
| Oracle Linux 7 | libXfont2 +1 | 2.0.3-1.0.1.el7 | ELSA-2026-51063 |
Advisories 31
- ALSA-2026:47084 Important: libXfont2 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:47079 Important: libXfont2 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:47103 Important: libXfont2 security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:51067 Red Hat Security Advisory: libXfont2 security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:51058 Red Hat Security Advisory: libXfont2 security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:51059 Red Hat Security Advisory: libXfont2 security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:51060 Red Hat Security Advisory: libXfont2 security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:51061 Red Hat Security Advisory: libXfont2 security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:51062 Red Hat Security Advisory: libXfont2 security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:47084 Red Hat Security Advisory: libXfont2 security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:47103 Red Hat Security Advisory: libXfont2 security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:47079 Red Hat Security Advisory: libXfont2 security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:51063 Red Hat Security Advisory: libXfont2 security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:51066 Red Hat Security Advisory: libXfont2 security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- WID-SEC-2026-2378 X.Org X11 Server (libXfont2): Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode mit Administratorrechten BSI CERT-Bund (WID) · Sep 29, 2026
- ELSA-2026-51063 Important: libXfont2 security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 12, 2026
- RLSA-2026:47084 Important: libXfont2 security update Rocky Linux Security Advisories · Aug 3, 2026
- RLSA-2026:47079 Important: libXfont2 security update Rocky Linux Security Advisories · Jul 29, 2026
- RLSA-2026:47103 Important: libXfont2 security update Rocky Linux Security Advisories · Jul 29, 2026
- ELSA-2026-47079 Important: libXfont2 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 28, 2026
- ELSA-2026-47084 Important: libXfont2 security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 28, 2026
- ELSA-2026-47103 Important: libXfont2 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 28, 2026
- USN-8560-1 libxfont vulnerabilities Ubuntu Security Notices (USN) · Jul 21, 2026
- ALAS2-2026-3814 Important: libXfont2 security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 20, 2026
- ALAS2-2026-3815 Important: libXfont security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 20, 2026
- ALAS2023-2026-1967 Important: libXfont2 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jul 20, 2026
- SUSE-SU-2026:22614-1 Security update for libXfont2 SUSE / openSUSE Security Updates · Jul 17, 2026
- openSUSE-SU-2026:21284-1 Security update for libXfont2 SUSE / openSUSE Security Updates · Jul 13, 2026
- openSUSE-SU-2026:11233-1 libXfont2-2-2.0.7-2.1 on GA media SUSE / openSUSE Security Updates · Jul 10, 2026
- SUSE-SU-2026:2793-1 Security update for libXfont2 SUSE / openSUSE Security Updates · Jul 9, 2026
- SUSE-SU-2026:2794-1 Security update for libXfont2 SUSE / openSUSE Security Updates · Jul 9, 2026