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Red Hat Enterprise Linux 10 EUVDEUVD-2026-16342

| CVE-2026-2436 MEDIUM
Expired Pointer Dereference (CWE-825)
2026-03-26 redhat GHSA-wpfw-5xvc-wq9w
6.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
6.5 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Ubuntu
MEDIUM
qualitative
SUSE
8.1 HIGH
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat
6.5 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High

Lifecycle Timeline

4
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
EUVD ID Assigned
Mar 26, 2026 - 20:00 euvd
EUVD-2026-16342
Analysis Generated
Mar 26, 2026 - 20:00 vuln.today
CVE Published
Mar 26, 2026 - 19:31 nvd
MEDIUM 6.5

DescriptionCVE.org

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.

AnalysisAI

libsoup's SoupServer contains a use-after-free vulnerability in the soup_server_disconnect() function that prematurely frees connection objects while TLS handshakes are pending, allowing remote unauthenticated attackers to trigger a server crash via denial of service when a handshake completes after memory deallocation. The vulnerability affects Red Hat Enterprise Linux versions 6, 7, 8, 9, and 10, as well as Ubuntu and Debian distributions across multiple releases. No public exploit code or active exploitation has been confirmed at the time of analysis.

Technical ContextAI

libsoup is a GNOME HTTP client/server library widely used across Linux distributions for HTTP protocol handling. The vulnerability resides in the SoupServer component's connection lifecycle management, specifically in the soup_server_disconnect() function which deallocates connection objects without verifying the state of in-flight TLS handshakes. This is a classic use-after-free condition (CWE-825: Expired Pointer Dereference) where freed memory is subsequently accessed when the TLS layer completes its handshake negotiation. The issue affects Red Hat Enterprise Linux (cpe:2.3:a:red_hat:red_hat_enterprise_linux_*) across versions 6 through 10, with confirmed tracking across 11 Ubuntu releases and 9 Debian releases per the intelligence provided. The GNOME GitLab issue tracker (gitlab.gnome.org/GNOME/libsoup/-/issues/501) contains the upstream advisory and technical details.

RemediationAI

Apply the vendor-released security update for libsoup when available from your distribution maintainer. Red Hat Enterprise Linux users should check https://access.redhat.com/security/cve/CVE-2026-2436 for patch availability and timing for their specific RHEL version (6, 7, 8, 9, or 10). Ubuntu and Debian users should monitor their respective security advisories and apply updates as released. Interim mitigation strategies include restricting network access to libsoup-based servers to trusted client IP ranges via firewall rules, disabling concurrent TLS handshakes where operationally feasible, or implementing connection timeout policies to minimize the race condition window. If the vulnerable server is behind a reverse proxy or load balancer, configure connection pooling and graceful shutdown policies to reduce premature disconnection scenarios.

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Vendor StatusVendor

Ubuntu

Priority: Medium
libsoup2.4
Release Status Version
xenial needs-triage -
bionic needs-triage -
focal needs-triage -
jammy needs-triage -
noble needs-triage -
questing needs-triage -
upstream needs-triage -
libsoup3
Release Status Version
jammy needs-triage -
noble needs-triage -
questing needs-triage -
upstream needs-triage -

Debian

Bug #1130498
libsoup2.4
Release Status Fixed Version Urgency
bullseye vulnerable 2.72.0-2 -
bullseye (security) vulnerable 2.72.0-2+deb11u3 -
bookworm vulnerable 2.74.3-1+deb12u1 -
trixie vulnerable 2.74.3-10.1 -
(unstable) fixed (unfixed) -
libsoup3
Release Status Fixed Version Urgency
bookworm vulnerable 3.2.3-0+deb12u2 -
trixie vulnerable 3.6.5-3 -
forky, sid vulnerable 3.6.6-1 -
(unstable) fixed (unfixed) -

SUSE

Severity: High
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Micro 5.2 Fixed

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EUVD-2026-16342 vulnerability details – vuln.today

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