Postfix Denial of Service Vulnerability in Ubuntu Releases
Article Content
- •Postfix vulnerability allows denial of service via crafted network traffic.
- •Affected Ubuntu versions include 26.04 LTS, 25.10, 24.04 LTS, and 22.04 LTS.
- •Users should update to the latest Postfix package versions to mitigate risks.
A denial of service vulnerability has been identified in Postfix, affecting multiple Ubuntu releases including 26.04 LTS, 25.10, 24.04 LTS, and 22.04 LTS. Discovered by Kamil Frankowicz, the flaw allows remote attackers to crash Postfix by sending specially crafted network traffic. The vulnerability is tracked as CVE-2026-43964, which was published on May 4, 2026. Users are advised to update their systems to the latest package versions to mitigate the risk. The affected versions include Postfix 3.10.6-4ubuntu2.1 for Ubuntu 26.04 LTS and earlier versions for other releases. A standard system update is recommended to address this issue. The vulnerability does not appear to be actively exploited at this time.
Ask AI about this cluster
Answers cite the sources they use
Timeline
More articles in this cluster (3)
Following this threat?
Track Ubuntu and CVE-2026-43964 in your own feed — you're alerted when they show up in new reporting, leak sites or exploitation.
Free account · no card needed
Continue Reading
PHP2Shell Vulnerabilities Exploited by AI-Driven Attackers Threat actors have exploited PHP2Shell vulnerabilities (CVE-2026-109618 and CVE-2026-109619) to target a government entity in Europe, gaining access to sensitive data within two hours of the initial breach. The attackers utilized AI tools for reconnaissance and post-exploitation activities, including accessing…