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X11 library allows code to crash or execute malicious code
OESA-2026-1590
Summary
The X11 library has a flaw that can cause a program to crash or execute unauthorized code if it's used with certain keyboard settings. This affects all systems that use the X11 library. To fix this, update the library to the latest version.
What to do
- Update libx11 to version 1.8.7-3.oe2403sp1.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| – | libx11 | <= 1.8.7-3.oe2403sp1 | 1.8.7-3.oe2403sp1 |
Original title
libX11 security update
Original description
Core X11 protocol client library.
Security Fix(es):
A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey() is called with a 0 group, it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is later called with a non-zero value of groups, this will cause a buffer overflow because the key actions are of the wrong size.(CVE-2025-26597)
Security Fix(es):
A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey() is called with a 0 group, it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is later called with a non-zero value of groups, this will cause a buffer overflow because the key actions are of the wrong size.(CVE-2025-26597)
- https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2025-26597 Vendor Advisory
Published: 15 Mar 2026 · Updated: 15 Mar 2026 · First seen: 15 Mar 2026