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Ubuntu 20.04 LTS NSS Critical DoS Risk USN-8071-2 CVE-2026-2781

ubuntu
Calendar Grey March 5, 2026
Dist Ubuntu Esm H88
NSS on Ubuntu updates critical flaws that could crash systems or allow code execution via network traffic.
NSS could be made to crash or run programs if it received specially crafted network traffic.

Summary

NSS could be made to crash or run programs if it received specially crafted

network traffic.

Software Description:

- nss: Network Security Service library

Details:

USN-8071-1 fixed a vulnerability in nss. This update provides the

corresponding fix for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS,

and Ubuntu 20.04 LTS.

Original advisory details:

It was discovered that NSS incorrectly handled memory when performing

certain GHASH operations. A remote attacker could use this issue to cause

NSS to crash, resulting in a denial of service, or possibly execute

arbitrary code.

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu NSS network security service

Update Instructions

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

Ubuntu 20.04 LTS
  libnss3                         2:3.98-0ubuntu0.20.04.2+esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  libnss3                         2:3.35-2ubuntu2.16+esm1
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libnss3                         2:3.28.4-0ubuntu0.16.04.14+esm5
                                  Available with Ubuntu Pro

Ubuntu 14.04 LTS
  libnss3                         2:3.28.4-0ubuntu0.14.04.5+esm13
                                  Available with Ubuntu Pro

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

References

https://ubuntu.com/security/notices/USN-8071-2

https://ubuntu.com/security/notices/USN-8071-1

CVE-2026-2781

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8071-2

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu NSS network security service

Package Information

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