SB2025121754 - SUSE update for xkbcomp 

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Main Vulnerability Database SB2025121754

SB2025121754 - SUSE update for xkbcomp

Published: December 17, 2025

Security Bulletin ID SB2025121754
Severity
Low
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 secuirty vulnerabilities.


1) Input validation error (CVE-ID: CVE-2018-15853)

The vulnerability allows a local attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to endless recursion exists in xkbcomp/expr.c during insufficient validation of user-supplied input. A local attacker can supply a specially crafted keymap file, trigger boolean negation and cause the application to crash.


2) Null pointer dereference (CVE-ID: CVE-2018-15859)

The vulnerability allows a local attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer usage condition by the ExprResolveLhs function, as defined in the xkbcomp/expr.c source code file. A local attacker can submit a specially crafted keymap file that submits malicious input, trigger NULL pointer dereference and cause the application to crash.


3) Null pointer dereference (CVE-ID: CVE-2018-15861)

The vulnerability allows a local attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer usage condition by the ExprResolveLhs function, as defined in the xkbcomp/expr.c source code file. A local attacker can submit a specially crafted keymap file that submits malicious input, trigger an xkb_intern_atom failure and cause the application to crash.


4) Null pointer dereference (CVE-ID: CVE-2018-15863)

The vulnerability allows a local attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer usage condition by the ResolveStateAndPredicate function, as defined in the xkbcomp/compat.c source code file. A local attacker can submit a specially crafted keymap file that submits malicious input to an affected system with a no-op modmaskexpression, trigger NULL pointer dereference and cause the application to crash.


Remediation

Install update from vendor's website.

References