CVE-2026-15713 MEDIUM

CVE-2026-15713: Libsoup: soupcache: libsoup: http/2 frame window exhaustion remote denial of service via memory leak

Vendor Red Hat
Product Red Hat Enterprise Linux 10
Weakness CWE-772
Published July 14, 2026
Last update July 14, 2026

CVSS base score

5.9/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

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

What the vulnerability does

01Description

A vulnerability was found in libsoup's HTTP/2 protocol implementation. The library fails to correctly release memory context blocks under specific stream termination conditions, such as when an HTTP/2 connection encounters window exhaustion or explicit stream resets. A remote, unauthenticated attacker acting as a malicious network peer can trick the connection engine into allocating stream states that are subsequently leaked during cleanup. Over a sustained period, this flaw allows the remote attacker to consume the system's heap allocations incrementally, triggering a denial of service (DoS) through an ultimate Out-of-Memory (OOM) application crash.

Key dates

02Disclosure timeline

July 14, 2026 CVE published
July 14, 2026 Record updated