Medium
libsoup3 — security advisory
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.
- Products
- libsoup3
- Affected versions
- 3.0.4-2, 3.0.4-3, 3.0.5-1, 3.0.7-0ubuntu1, 3.0.7-0ubuntu1+esm1, 3.0.7-0ubuntu1+esm2, 3.0.7-0ubuntu1+esm3, 3.0.7-0ubuntu1+esm4, 3.0.7-0ubuntu1+esm5, 3.0.7-0ubuntu1+esm6, 3.0.7-0ubuntu1+esm7, 3.0.7-0ubuntu1+esm8, 3.0.7-0ubuntu1+esm9, 3.4.2-4, 3.4.4-1, 3.4.4-2, 3.4.4-4, 3.4.4-5, 3.4.4-5build1, 3.4.4-5build2, 3.4.4-5ubuntu0.1, 3.4.4-5ubuntu0.2, 3.4.4-5ubuntu0.3, 3.4.4-5ubuntu0.4, 3.4.4-5ubuntu0.5, 3.4.4-5ubuntu0.6, 3.4.4-5ubuntu0.7, 3.4.4-5ubuntu0.8, 3.4.4-5ubuntu0.9, 3.6.5-4, 3.6.5-5, 3.6.5-6, 3.6.5-7, 3.6.5-9, 3.6.6-1, 3.6.6-1ubuntu0.1, 3.6.6-1ubuntu3
- Fixed versions
- Not specified
- CVEs
- CVE-2026-15713
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 17:41 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-15713
libsoup3
Fixed versions: Not specified
libsoup3
Fixed versions: Not specified
libsoup3
Fixed versions: Not specified
libsoup3
Fixed versions: Not specified
Complete source record
{
"id": "ee5e3ba286284e2257053e97e05826600ac989f786e841692ec02bc2e455f25c",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-15713",
"method": "structured",
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"modified": "2026-10-22T04:31:01.762474080Z",
"provider": "osv",
"upstream": [
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"references": [
"https://ubuntu.com/security/CVE-2026-15713",
"https://www.cve.org/CVERecord?id=CVE-2026-15713",
"https://access.redhat.com/security/cve/CVE-2026-15713",
"https://bugzilla.redhat.com/show_bug.cgi?id=2499941",
"https://gitlab.gnome.org/GNOME/libsoup/-/work_items/541"
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"source_id": "core-osv",
"document_id": 404325,
"published_at": "2026-07-14T20:16:00+00:00"
}