CVE catalog
CVE-2026-94284
An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.13% · Oct 25, 2026
An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libx11 | sid | 2:1.8.14-1 | fixed |
| Debian | libx11 | forky | 2:1.8.13-1 | vulnerable |
| Debian | libx11 | trixie | 2:1.8.12-1 | vulnerable |
| Debian | libx11 | bookworm | 2:1.8.4-2+deb12u2 | vulnerable |
| Debian | libx11 | bookworm-security | 2:1.8.4-2+deb12u2 | vulnerable |
| Ubuntu | libx11 | noble | 2:1.8.7-1ubuntu0.1 | fixed |
| Ubuntu | libx11-6 | noble | 2:1.8.7-1ubuntu0.1 | fixed |
| Ubuntu | libx11-data | noble | 2:1.8.7-1ubuntu0.1 | fixed |
| Ubuntu | libx11-dev | noble | 2:1.8.7-1ubuntu0.1 | fixed |
| Ubuntu | libx11-doc | noble | 2:1.8.7-1ubuntu0.1 | fixed |
| Ubuntu | libx11-xcb-dev | noble | 2:1.8.7-1ubuntu0.1 | fixed |
| Ubuntu | libx11-xcb1 | noble | 2:1.8.7-1ubuntu0.1 | fixed |
| Alpine | libx11 | 3.24 | 1.8.14-r0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libx11 | source | sid | 2:1.8.14-1 | not yet assigned | Not reported | [1149668] |
| Debian | libx11 | source | forky | (unfixed) | not yet assigned | Not reported | [1149668] |
| Debian | libx11 | source | trixie | (unfixed) | not yet assigned | Not reported | [1149668] |
| Debian | libx11 | source | bookworm | (unfixed) | not yet assigned | Not reported | [1149668] |
| Ubuntu | libx11 | deb | noble | 2:1.8.7-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | libx11-6 | deb | noble | 2:1.8.7-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | libx11-data | deb | noble | 2:1.8.7-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | libx11-dev | deb | noble | 2:1.8.7-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | libx11-doc | deb | noble | 2:1.8.7-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | libx11-xcb-dev | deb | noble | 2:1.8.7-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | libx11-xcb1 | deb | noble | 2:1.8.7-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Alpine | libx11 | apk | 3.24 | 1.8.14-r0 | Not reported | ALPINE-CVE-2026-94284 | Not reported |
Notes
[trixie] libx11: Minor issue [bookworm] libx11: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libx11-6]Affected
Source package: [libx11]
Details (4)
2:1.8.4-2+deb12u2· amd64 · bookwormAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· arm64 · bookwormAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· amd64 · bookworm-securityAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· arm64 · bookworm-securityAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
- [libx11-data]Affected
Source package: [libx11]
Details (4)
2:1.8.4-2+deb12u2· all · bookwormAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· all · bookwormAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· all · bookworm-securityAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· all · bookworm-securityAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
- [libx11-dev]Affected
Source package: [libx11]
Details (4)
2:1.8.4-2+deb12u2· amd64 · bookwormAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· arm64 · bookwormAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· amd64 · bookworm-securityAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· arm64 · bookworm-securityAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
- [libx11-doc]Affected
Source package: [libx11]
Details (4)
2:1.8.4-2+deb12u2· all · bookwormAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· all · bookwormAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· all · bookworm-securityAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· all · bookworm-securityAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
- [libx11-xcb1]Affected
Source package: [libx11]
Details (4)
2:1.8.4-2+deb12u2· amd64 · bookwormAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· arm64 · bookwormAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· amd64 · bookworm-securityAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· arm64 · bookworm-securityAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
- [libx11-xcb-dev]Affected
Source package: [libx11]
Details (4)
2:1.8.4-2+deb12u2· amd64 · bookwormAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· arm64 · bookwormAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· amd64 · bookworm-securityAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
2:1.8.4-2+deb12u2· arm64 · bookworm-securityAffected
nvd · libx11 · debian · bookworm; nvd · libx11 · debian · 12
[Debian 13 (Trixie)]
- [libx11-6]Affected
Source package: [libx11]
Details (2)
2:1.8.12-1· amd64 · trixieAffected
nvd · libx11 · debian · 13
2:1.8.12-1· arm64 · trixieAffected
nvd · libx11 · debian · 13
- [libx11-data]Affected
Source package: [libx11]
Details (2)
2:1.8.12-1· all · trixieAffected
nvd · libx11 · debian · 13
2:1.8.12-1· all · trixieAffected
nvd · libx11 · debian · 13
- [libx11-dev]Affected
Source package: [libx11]
Details (2)
2:1.8.12-1· amd64 · trixieAffected
nvd · libx11 · debian · 13
2:1.8.12-1· arm64 · trixieAffected
nvd · libx11 · debian · 13
- [libx11-doc]Affected
Source package: [libx11]
Details (2)
2:1.8.12-1· all · trixieAffected
nvd · libx11 · debian · 13
2:1.8.12-1· all · trixieAffected
nvd · libx11 · debian · 13
- [libx11-xcb1]Affected
Source package: [libx11]
Details (2)
2:1.8.12-1· amd64 · trixieAffected
nvd · libx11 · debian · 13
2:1.8.12-1· arm64 · trixieAffected
nvd · libx11 · debian · 13
- [libx11-xcb-dev]Affected
Source package: [libx11]
Details (2)
2:1.8.12-1· amd64 · trixieAffected
nvd · libx11 · debian · 13
2:1.8.12-1· arm64 · trixieAffected
nvd · libx11 · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11894-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-94284]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-94284]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-94284]
- [https://security-tracker.debian.org/tracker/CVE-2026-94284]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-94284.json]
- [https://ubuntu.com/security/notices/USN-8913-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3606.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]