VulnerabilityModified
CVE-2025-26599
An access to an uninitialized pointer flaw was found in X.Org and Xwayland.
HIGH 7.8EPSS 0.40%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.40% probability · 33th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-824
- Affected
- tigervnc/tigervnc · x.org/x server · x.org/xwayland · redhat/enterprise linux
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2025:2500Third Party Advisory
- https://access.redhat.com/errata/RHSA-2025:2502Third Party Advisory
- https://access.redhat.com/errata/RHSA-2025:2861Third Party Advisory
- https://access.redhat.com/errata/RHSA-2025:2862Third Party Advisory
- https://access.redhat.com/errata/RHSA-2025:2865Third Party Advisory
- https://access.redhat.com/errata/RHSA-2025:2866Third Party Advisory
- https://access.redhat.com/errata/RHSA-2025:2873Third Party Advisory
- https://access.redhat.com/errata/RHSA-2025:2874Third Party Advisory
- https://access.redhat.com/errata/RHSA-2025:2875Third Party Advisory
- https://access.redhat.com/errata/RHSA-2025:2879Third Party Advisory
- https://access.redhat.com/errata/RHSA-2025:2880Third Party Advisory
- https://access.redhat.com/errata/RHSA-2025:3976
- https://access.redhat.com/errata/RHSA-2025:7163
- https://access.redhat.com/errata/RHSA-2025:7165
- https://access.redhat.com/errata/RHSA-2025:7458
- https://access.redhat.com/security/cve/CVE-2025-26599Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2345253Issue Tracking
- https://lists.debian.org/debian-lts-announce/2025/02/msg00036.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.