High
libsoup3 — security advisory
A flaw was found in libsoup's SoupServer. A remote attacker could exploit a use-after-free vulnerability where the `soup_server_disconnect()` function frees connection objects prematurely, even if a TLS handshake is still pending. If the handshake completes after the connection object has been freed, a dangling pointer is accessed, leading to a server crash and a Denial of Service.
- 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, 3.6.5-1, 3.6.5-1ubuntu1, 3.6.5-3, 3.6.5-4, 3.6.5-4ubuntu0.1, 3.6.5-4ubuntu0.2, 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-2026-2436
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 17:41 UTC · Revision 1
Source evidence
A flaw was found in libsoup's SoupServer. A remote attacker could exploit a use-after-free vulnerability where the `soup_server_disconnect()` function frees connection objects prematurely, even if a TLS handshake is still pending. If the handshake completes after the connection object has been freed, a dangling pointer is accessed, leading to a server crash and a Denial of Service.
osv:UBUNTU-CVE-2026-2436
libsoup3
Fixed versions: Not specified
libsoup3
Fixed versions: Not specified
libsoup3
Fixed versions: Not specified
libsoup3
Fixed versions: Not specified
libsoup3
Fixed versions: Not specified
Complete source record
{
"id": "df2d14d678bc1d3ff12d79076868c4cb7109918f96fc39f5fdd788a7d1ce9fd9",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-2436",
"method": "structured",
"payload": {
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"modified": "2026-10-22T04:31:02.587614839Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2026-2436",
"https://www.cve.org/CVERecord?id=CVE-2026-2436",
"https://gitlab.gnome.org/GNOME/libsoup/-/issues/501"
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"source_id": "core-osv",
"document_id": 404330,
"published_at": "2026-03-26T20:16:00+00:00"
}