CVE-2025-26599
published 2025-02-25CVE-2025-26599: 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…
PriorityP339high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.40%
32.3th percentile
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.
Affected
16 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | xorg-server | < xorg-server 2:21.1.7-3+deb12u9 (bookworm) | xorg-server 2:21.1.7-3+deb12u9 (bookworm) |
| debian | xwayland | < xorg-server 2:21.1.7-3+deb12u9 (bookworm) | xorg-server 2:21.1.7-3+deb12u9 (bookworm) |
| msrc | azl3_xorg-x11-server-xwayland_24.1.1-3_on_azure_linux_3.0 | — | — |
| msrc | azl3_xorg-x11-server-xwayland_24.1.6-1_on_azure_linux_3.0 | — | — |
| msrc | cbl2_xorg-x11-server_1.20.10-15_on_cbl_mariner_2.0 | — | — |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
| x.org | x_server | < 21.1.16 | 21.1.16 |
| x.org | xorg-server | >= 0 < 2:1.20.11-1+deb11u15 | 2:1.20.11-1+deb11u15 |
| x.org | xorg-server | >= 0 < 2:21.1.7-3+deb12u9 | 2:21.1.7-3+deb12u9 |
| x.org | xorg-server | >= 0 < 2:21.1.16-1 | 2:21.1.16-1 |
| x.org | xorg-server | >= 0 < 2:21.1.16-1 | 2:21.1.16-1 |
| x.org | xwayland | < 24.1.6 | 24.1.6 |
| x.org | xwayland | >= 0 < 2:24.1.6-1 | 2:24.1.6-1 |
| x.org | xwayland | >= 0 < 2:24.1.6-1 | 2:24.1.6-1 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_msrc7.8HIGH
vendor_redhat7.8HIGH
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Ubuntu
X.Org X Server regression
vendor_ubuntu·2025-03-17
CVE-2025-26598 X.Org X Server regression
Title: X.Org X Server regression
Summary: Several security issues were fixed in X.Org X Server.
USN-7299-2 fix vulnerabilities in X.Org X Server. This fix caused
a regression in Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. This update
fix the regression and re-apply the fix for the CVE listed.
We apologize for the inconvenience.
Original advisory details:
Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled
certain memory operations. An attacker could use these issues to cause the
X Server to crash, leading to a denial of service, or possibly execute
arbitrary code.
Instructions: After a standard system update you need to reboot your computer to make all
the necessary changes.
Ubuntu
X.Org X Server vulnerabilities
vendor_ubuntu·2025-03-10
CVE-2025-26594 X.Org X Server vulnerabilities
Title: X.Org X Server vulnerabilities
Summary: Several security issues were fixed in X.Org X Server.
USN-7299-1 fixed several vulnerabilities in X.Org. This update provides
the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.
Original advisory details:
Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled
certain memory operations. An attacker could use these issues to cause the
X Server to crash, leading to a denial of service, or possibly execute
arbitrary code.
Instructions: After a standard system update you need to reboot your computer to make all
the necessary changes.
Red Hat
xorg: xwayland: Use of uninitialized pointer in compRedirectWindow()
vendor_redhat·2025-02-25·CVSS 7.8
CVE-2025-26599 [HIGH] CWE-824 xorg: xwayland: Use of uninitialized pointer in compRedirectWindow()
xorg: xwayland: Use of uninitialized pointer in compRedirectWindow()
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.
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 unin
BSD
OpenBSD 7.5 Errata 018: SECURITY FIX
bsd_advisories·2025-02-25·CVSS 7.8
CVE-2025-26594 [HIGH] OpenBSD 7.5 Errata 018: SECURITY FIX
OpenBSD 7.5 Errata 018: SECURITY FIX
018: SECURITY FIX: February 25, 2025
All architectures Multiple X server issues. CVE-2025-26594 CVE-2025-26595 CVE-2025-26596 CVE-2025-26597 CVE-2025-26598 CVE-2025-26599 CVE-2025-26600 CVE-2025-26601
Ubuntu
X.Org X Server vulnerabilities
vendor_ubuntu·2025-02-25
CVE-2025-26595 X.Org X Server vulnerabilities
Title: X.Org X Server vulnerabilities
Summary: Several security issues were fixed in X.Org X Server.
Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled
certain memory operations. An attacker could use these issues to cause the
X Server to crash, leading to a denial of service, or possibly execute
arbitrary code.
Instructions: After a standard system update you need to reboot your computer to make all
the necessary changes.
Microsoft
Xorg: xwayland: use of uninitialized pointer in compredirectwindow()
vendor_msrc·2025-02-11·CVSS 7.8
CVE-2025-26599 [HIGH] CWE-824 Xorg: xwayland: use of uninitialized pointer in compredirectwindow()
Xorg: xwayland: use of uninitialized pointer in compredirectwindow()
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
redhat: redhat
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference
Debian
CVE-2025-26599: xorg-server - An access to an uninitialized pointer flaw was found in X.Org and Xwayland. The ...
vendor_debian·2025·CVSS 7.8
CVE-2025-26599 [HIGH] CVE-2025-26599: xorg-server - An access to an uninitialized pointer flaw was found in X.Org and Xwayland. The ...
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.
Scope: local
bookworm: resolved (fixed in 2:21.1.7-3+deb12u9)
bullseye: resolved (fixed in 2:1.20.11-1+deb11u15)
forky: resolved (fixed in 2:21.1.16-1)
sid: resolved (fixed in 2:21.1.16-1)
trixie: resolved (fixed in 2:21.1.16-1)
OSV
CVE-2025-26599: An access to an uninitialized pointer flaw was found in X
osv·2025-02-25·CVSS 7.8
CVE-2025-26599 [HIGH] CVE-2025-26599: An access to an uninitialized pointer flaw was found in X
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.
GHSA
GHSA-wv34-xcj8-f3mq: An access to an uninitialized pointer flaw was found in X
ghsa_unreviewed·2025-02-25
CVE-2025-26599 [HIGH] CWE-824 GHSA-wv34-xcj8-f3mq: An access to an uninitialized pointer flaw was found in X
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.
No detection rules found.
No public exploits indexed.
https://access.redhat.com/errata/RHSA-2025:2500https://access.redhat.com/errata/RHSA-2025:2502https://access.redhat.com/errata/RHSA-2025:2861https://access.redhat.com/errata/RHSA-2025:2862https://access.redhat.com/errata/RHSA-2025:2865https://access.redhat.com/errata/RHSA-2025:2866https://access.redhat.com/errata/RHSA-2025:2873https://access.redhat.com/errata/RHSA-2025:2874https://access.redhat.com/errata/RHSA-2025:2875https://access.redhat.com/errata/RHSA-2025:2879https://access.redhat.com/errata/RHSA-2025:2880https://access.redhat.com/errata/RHSA-2025:3976https://access.redhat.com/errata/RHSA-2025:7163https://access.redhat.com/errata/RHSA-2025:7165https://access.redhat.com/errata/RHSA-2025:7458https://access.redhat.com/security/cve/CVE-2025-26599https://bugzilla.redhat.com/show_bug.cgi?id=2345253https://lists.debian.org/debian-lts-announce/2025/02/msg00036.html
2025-02-25
Published