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Ubuntu 25.10 Squid Critical Denial of Service Vulnerability USN-8157-1

ubuntu
Calendar Grey April 8, 2026
Dist Ubuntu Esm H88
Squid security issues fixed in Ubuntu affecting multiple releases, addressing DoS and data disclosure risks.
Several security issues were fixed in Squid.

Summary

Several security issues were fixed in Squid.

Software Description:

- squid: Web proxy cache server

Details:

It was discovered that Squid incorrectly handled certain ICP traffic. In

environments where ICP support is enabled, a remote attacker could use this

issue to cause Squid to crash, resulting in a denial of service, or obtain

small amounts of sensitive information.

Topics%20covered

Topics Covered

security advisory critical DoS Ubuntu squid sensitive information

Update Instructions

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

Ubuntu 25.10
  squid                           6.14-0ubuntu0.25.10.2

Ubuntu 24.04 LTS
  squid                           6.14-0ubuntu0.24.04.2

Ubuntu 22.04 LTS
  squid                           5.9-0ubuntu0.22.04.5

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

References

https://ubuntu.com/security/notices/USN-8157-1

CVE-2026-32748, CVE-2026-33515, CVE-2026-33526

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8157-1

Topics%20covered

Topics Covered

security advisory critical DoS Ubuntu squid sensitive information

Package Information

https://launchpad.net/ubuntu/+source/squid/6.14-0ubuntu0.25.10.2
https://launchpad.net/ubuntu/+source/squid/6.14-0ubuntu0.24.04.2
https://launchpad.net/ubuntu/+source/squid/5.9-0ubuntu0.22.04.5

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