Vulnerability · Published Sep 21, 2026 · Assigned by suse
CVE-2026-88807libXrender RenderQueryPictFormats Reply Heap-based Buffer Overflow
High 8.9
In plain English
A high-severity heap buffer overflow in libXrender from X.org. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)8.9High
Exploit odds (30 days)0.3%top 81.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | libXrender | 0.9.11-8.el10_2.1 | ALSA-2026:91003 |
| AlmaLinux:8 | libXrender | 0.9.10-8.el8_10 | ALSA-2026:91267 |
| AlmaLinux:9 | libXrender | 0.9.10-16.el9_8.2 | ALSA-2026:91057 |
| AlmaLinux:10 | libXrender-devel | 0.9.11-8.el10_2.1 | ALSA-2026:91003 |
| AlmaLinux:8 | libXrender-devel | 0.9.10-8.el8_10 | ALSA-2026:91267 |
| AlmaLinux:9 | libXrender-devel | 0.9.10-16.el9_8.2 | ALSA-2026:91057 |
| Alpine:v3.24 | libxrender | 0.9.13-r0 | ALPINE-CVE-2026-88807 |
| Debian:12 | libxrender | no fix listed | DEBIAN-CVE-2026-88807 |
| Debian:13 | libxrender | no fix listed | DEBIAN-CVE-2026-88807 |
| Debian:14 | libxrender | 1:0.9.13-1 | DEBIAN-CVE-2026-88807 |
| Rocky Linux:10 | libXrender | 0:0.9.11-8.el10_2.1 | RLSA-2026:91003 |
| Rocky Linux:8 | libXrender | 0:0.9.10-8.el8_10 | RLSA-2026:91267 |
| Rocky Linux:9 | libXrender | 0:0.9.10-16.el9_8.2 | RLSA-2026:91057 |
| Ubuntu:22.04:LTS | libxrender | no fix listed | UBUNTU-CVE-2026-88807 |
| Ubuntu:24.04:LTS | libxrender | no fix listed | UBUNTU-CVE-2026-88807 |
| Ubuntu:26.04:LTS | libxrender | no fix listed | UBUNTU-CVE-2026-88807 |
| Ubuntu:26.10 | libxrender | no fix listed | UBUNTU-CVE-2026-88807 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| X.org | libXrender | 0 – before 0.9.13 |
Weakness: CWE-122 · Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H