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Description

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.

PUBLISHED Reserved 2026-02-12 | Published 2026-03-26 | Updated 2026-04-21 | Assigner redhat




MEDIUM: 6.5CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Problem types

Expired Pointer Dereference

Product status

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Timeline

2026-02-26:Reported to Red Hat.
2026-02-11:Made public.

Credits

Red Hat would like to thank Ilya Rozentsvaig for reporting this issue.

References

access.redhat.com/security/cve/CVE-2026-2436 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2442909 (RHBZ#2442909) issue-tracking

gitlab.gnome.org/GNOME/libsoup/-/issues/501

cve.org (CVE-2026-2436)

nvd.nist.gov (CVE-2026-2436)

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