Description
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.
Problem types
Missing Release of Resource after Effective Lifetime
Product status
Timeline
| 2026-07-14: | Reported to Red Hat. |
| 2026-07-14: | Made public. |
Credits
Red Hat would like to thank cavid for reporting this issue.
References
access.redhat.com/security/cve/CVE-2026-15713
bugzilla.redhat.com/show_bug.cgi?id=2499941 (RHBZ#2499941)
gitlab.gnome.org/GNOME/libsoup/-/work_items/541