CVE-2026-57941

Publication date 1 October 2026

Last updated 8 October 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

Description

Use After Free vulnerability in Apache HTTP Server's mod_http2 via shared session->bbtmp re-entrancy This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

Status

Package Ubuntu Release Status
apache2 26.04 LTS resolute
Fixed 2.4.66-2ubuntu2.5
24.04 LTS noble
Fixed 2.4.58-1ubuntu8.16
22.04 LTS jammy
Fixed 2.4.52-1ubuntu4.24
20.04 LTS focal
Fixed 2.4.41-4ubuntu3.23+esm8
18.04 LTS bionic
Fixed 2.4.29-1ubuntu4.27+esm12
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
apache2

Severity score breakdown

CVSS version: CVSS v3.0

Base score 9.8 · Critical

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-8898-1
    • Apache HTTP Server vulnerabilities
    • 7 October 2026

Other references

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