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From: Salvatore Bonaccorso <carnil@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: libsoup3: CVE-2026-15713
Message-ID: <178509645910.125233.4090259351401300915.reportbug@eldamar.lan>
X-Mailer: reportbug 13.2.0+nmu1
Date: Sun, 26 Jul 2026 22:07:39 +0200
Delivered-To: submit@bugs.debian.org

Source: libsoup3
Version: 3.6.6-1
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/libsoup/-/work_items/541
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for libsoup3.

CVE-2026-15713[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-15713
    https://www.cve.org/CVERecord?id=CVE-2026-15713
[1] https://gitlab.gnome.org/GNOME/libsoup/-/work_items/541

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore
]