Use After Free Affecting libsoup3-doc package, versions <0:3.6.5-3.el10_1.11


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.83% (53rd percentile)

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  • Snyk IDSNYK-RHEL10-LIBSOUP3DOC-16674572
  • published14 May 2026
  • disclosed16 Mar 2026

Introduced: 16 Mar 2026

CVE-2026-4271  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:10 libsoup3-doc to version 0:3.6.5-3.el10_1.11 or higher.
This issue was patched in RHSA-2026:15968.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsoup3-doc package and not the libsoup3-doc package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

A flaw was found in libsoup, a library for handling HTTP requests. This vulnerability, known as a Use-After-Free, occurs in the HTTP/2 server implementation. A remote attacker can exploit this by sending specially crafted HTTP/2 requests that cause authentication failures. This can lead to the application attempting to access memory that has already been freed, potentially causing application instability or crashes, resulting in a Denial of Service (DoS).

CVSS Base Scores

version 3.1