USN-8819-4

Details

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

Network file system (NFS) server daemon;
IPv6 networking;
Netfilter; (CVE-2025-38724, CVE-2026-53131, CVE-2026-53221)

Affected Packages

linux-aws-fips

Ubuntu Pro FIPS-updates 18.04 LTS

Fixed in:

4.15.0-2135.141

linux-azure-fips

Ubuntu Pro FIPS-updates 18.04 LTS

Fixed in:

4.15.0-2115.121

linux-fips

Ubuntu Pro FIPS-updates 18.04 LTS

Fixed in:

4.15.0-1152.164

References

REPORT

https://ubuntu.com/security/CVE-2025-38724

REPORT

https://ubuntu.com/security/CVE-2026-53131

REPORT

https://ubuntu.com/security/CVE-2026-53221

ADVISORY

https://ubuntu.com/security/notices/USN-8819-4