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Ubuntu 18.04: USN-7787-1 Libxslt Important Memory Handling Issues

ubuntu
Calendar Grey October 1, 2025
Dist Ubuntu Esm H88
Critical issues in Libxslt were resolved in Ubuntu 18.04, 16.04, and 14.04 LTS with important updates.
Several security issues were fixed in Libxslt.

Summary

Several security issues were fixed in Libxslt.

Software Description:

- libxslt: XSLT processing library

Details:

Ivan Fratric discovered that Libxslt did not correctly handle certain

memory operations. An attacker could possibly use this issue to execute

arbitrary code or cause a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu important arbitrary code libxslt

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS
  libxslt1.1                      1.1.29-5ubuntu0.3+esm2
                                  Available with Ubuntu Pro
  xsltproc                        1.1.29-5ubuntu0.3+esm2
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libxslt1.1                      1.1.28-2.1ubuntu0.3+esm3
                                  Available with Ubuntu Pro
  xsltproc                        1.1.28-2.1ubuntu0.3+esm3
                                  Available with Ubuntu Pro

Ubuntu 14.04 LTS
  libxslt1.1                      1.1.28-2ubuntu0.2+esm4
                                  Available with Ubuntu Pro
  xsltproc                        1.1.28-2ubuntu0.2+esm4
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-7787-1

CVE-2024-55549, CVE-2025-24855

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7787-1

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu important arbitrary code libxslt

Package Information

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