CVE-2025-26597 Xorg: xwayland: buffer overflow in xkbchangetypesofkey()
A buffer overflow in X.Org and Xwayland allows attackers to execute arbitrary code or cause a denial of service via crafted key symbol changes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-26597?
CVE-2025-26597 is a high-severity memory corruption vulnerability in Redhat Enterprise Linux, published on 25 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-119
Which versions are affected by CVE-2025-26597?
It affects 4 products.
Linux distribution packages (25)
libX11 SUSE:Enterprise Storage 7.1 | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise Micro 5.2 | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise Micro 5.3 | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise Micro 5.4 | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise Micro 5.5 | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise Module for Basesystem 15 SP6 | All versions | 1.8.7-150600.3.3.1 |
libX11 SUSE:Linux Enterprise Server 12 SP5-LTSS | All versions | 1.6.2-12.36.1 |
libX11 SUSE:Linux Enterprise Server 15 SP3-LTSS | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise Server 15 SP4-LTSS | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise Server 15 SP5-LTSS | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 1.6.2-12.36.1 |
libX11 SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Linux Micro 6.0 | All versions | 1.8.7-3.1 |
libX11 SUSE:Linux Micro 6.1 | All versions | 1.8.7-slfo.1.1_2.1 |
libX11 SUSE:Manager Proxy 4.3 | All versions | 1.6.5-150000.3.36.1 |
libX11 SUSE:Manager Server 4.3 | All versions | 1.6.5-150000.3.36.1 |
libX11 openSUSE:Leap 15.6 | All versions | 1.8.7-150600.3.3.1 |
libX11 openSUSE:Tumbleweed | All versions | 1.8.11-2.1 |
Products include Redhat Enterprise Linux, Tigervnc Tigervnc, X.org X Server, X.org Xwayland.
How do I fix CVE-2025-26597?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-26597 being exploited?
There is no known exploitation of CVE-2025-26597 in the wild and no public exploit code.
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Sources
Also known as AZL-57283, AZL-57383, AZL-57479, BELL-CVE-2025-26597, DEBIAN-CVE-2025-26597, GHSA-7qjx-378m-p8hm and 12 more.