CVE-2025-26598
Xorg: xwayland: out-of-bounds write in createpointerbarrierclient()
Severity Score
7.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Track*
*SSVC
Descriptions
An out-of-bounds write flaw was found in X.Org and Xwayland. The function GetBarrierDevice() searches for the pointer device based on its device ID and returns the matching value, or supposedly NULL, if no match was found. However, the code will return the last element of the list if no matching device ID is found, which can lead to out-of-bounds memory access.
This vulnerability allows local attackers to escalate privileges on affected installations of X.Org Server. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the handling of disabled pointer devices. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root.
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 theCVE listed. 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.
*Credits:
Jan-Niklas Sohn
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Track*
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2025-02-12 CVE Reserved
- 2025-02-25 CVE Published
- 2025-06-16 CVE Updated
- 2025-06-27 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-787: Out-of-bounds Write
CAPEC
References (16)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2025-26598 | 2025-02-25 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2345254 | 2025-02-25 | |
| https://access.redhat.com/errata/RHSA-2025:2500 | 2025-06-16 | |
| https://access.redhat.com/errata/RHSA-2025:2502 | 2025-06-16 | |
| https://access.redhat.com/errata/RHSA-2025:2861 | 2025-06-16 | |
| https://access.redhat.com/errata/RHSA-2025:2862 | 2025-06-16 | |
| https://access.redhat.com/errata/RHSA-2025:2865 | 2025-06-16 | |
| https://access.redhat.com/errata/RHSA-2025:2866 | 2025-06-16 | |
| https://access.redhat.com/errata/RHSA-2025:2873 | 2025-06-16 | |
| https://access.redhat.com/errata/RHSA-2025:2874 | 2025-06-16 | |
| https://access.redhat.com/errata/RHSA-2025:2875 | 2025-06-16 | |
| https://access.redhat.com/errata/RHSA-2025:2879 | 2025-06-16 | |
| https://access.redhat.com/errata/RHSA-2025:2880 | 2025-06-16 | |
| https://access.redhat.com/errata/RHSA-2025:7163 | 2025-06-16 | |
| https://access.redhat.com/errata/RHSA-2025:7165 | 2025-06-16 | |
| https://access.redhat.com/errata/RHSA-2025:7458 | 2025-06-16 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Oracle Search vendor "Oracle" | Linux Search vendor "Oracle" for product "Linux" | * | - |
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| Red Hat Search vendor "Red Hat" | Enterprise Linux Search vendor "Red Hat" for product "Enterprise Linux" | * | - |
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Aus Search vendor "Redhat" for product "Rhel Aus" | * | - |
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| Redhat Search vendor "Redhat" | Rhel E4s Search vendor "Redhat" for product "Rhel E4s" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Eus Search vendor "Redhat" for product "Rhel Eus" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Tus Search vendor "Redhat" for product "Rhel Tus" | * | - |
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| Tigervnc Search vendor "Tigervnc" | Tigervnc Search vendor "Tigervnc" for product "Tigervnc" | * | - |
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| X.org Search vendor "X.org" | X Server Search vendor "X.org" for product "X Server" | * | - |
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| X.org Search vendor "X.org" | Xwayland Search vendor "X.org" for product "Xwayland" | * | - |
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| Amazon Search vendor "Amazon" | Linux Search vendor "Amazon" for product "Linux" | * | - |
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | * | - |
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | * | - |
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | * | - |
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| Freebsd Search vendor "Freebsd" | Freebsd Search vendor "Freebsd" for product "Freebsd" | * | - |
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| Opensuse Search vendor "Opensuse" | Leap Search vendor "Opensuse" for product "Leap" | * | - |
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| Oracle Search vendor "Oracle" | Linux Search vendor "Oracle" for product "Linux" | * | - |
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Aus Search vendor "Redhat" for product "Rhel Aus" | * | - |
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| Redhat Search vendor "Redhat" | Rhel E4s Search vendor "Redhat" for product "Rhel E4s" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Els Search vendor "Redhat" for product "Rhel Els" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Eus Search vendor "Redhat" for product "Rhel Eus" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Tus Search vendor "Redhat" for product "Rhel Tus" | * | - |
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| Rocky Search vendor "Rocky" | Linux Search vendor "Rocky" for product "Linux" | * | - |
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| Slackware Search vendor "Slackware" | Slackware Linux Search vendor "Slackware" for product "Slackware Linux" | * | - |
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| Suse Search vendor "Suse" | Sle-module-basesystem Search vendor "Suse" for product "Sle-module-basesystem" | * | - |
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| Suse Search vendor "Suse" | Sle-module-development-tools Search vendor "Suse" for product "Sle-module-development-tools" | * | - |
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| Suse Search vendor "Suse" | Sle-we Search vendor "Suse" for product "Sle-we" | * | - |
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| Suse Search vendor "Suse" | Sle Hpc-espos Search vendor "Suse" for product "Sle Hpc-espos" | * | - |
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| Suse Search vendor "Suse" | Sle Hpc-ltss Search vendor "Suse" for product "Sle Hpc-ltss" | * | - |
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| Suse Search vendor "Suse" | Sles-ltss-extended-security Search vendor "Suse" for product "Sles-ltss-extended-security" | * | - |
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| Suse Search vendor "Suse" | Sles-ltss Search vendor "Suse" for product "Sles-ltss" | * | - |
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| Suse Search vendor "Suse" | Sles Sap Search vendor "Suse" for product "Sles Sap" | * | - |
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| Suse Search vendor "Suse" | Suse-manager-proxy Search vendor "Suse" for product "Suse-manager-proxy" | * | - |
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| Suse Search vendor "Suse" | Suse-manager-server Search vendor "Suse" for product "Suse-manager-server" | * | - |
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