CVE-2025-26599
7.8
HIGH
CVSS 3.1
EPSS 0.03%
Description
An access to an uninitialized pointer flaw was found in X.Org and Xwayland. The function compCheckRedirect() may fail if it cannot allocate the backing pixmap. In that case, compRedirectWindow() will return a BadAlloc error without validating the window tree marked just before, which leaves the validated data partly initialized and the use of an uninitialized pointer later.
How to fix CVE-2025-26599
To remediate CVE-2025-26599, upgrade the affected package to a fixed version below.
- —upgrade to 2:1.20.11-1+deb11u15 or later
- —no fix listed
Is CVE-2025-26599 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2:1.20.11-1+deb11u15
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |