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CVE-2026-52986

kernel: netfilter: nf_conntrack_sip: don't use simple_strtoul

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · June 24, 2026

Updated · October 9, 2026

Description

A flaw was found in the Linux kernel's netfilter SIP (Session Initiation Protocol) connection tracking module. This vulnerability, caused by unsafe port parsing, allows a remote attacker to send specially crafted malformed packets. Such packets could lead to excessive resource consumption, potentially resulting in a denial of service (DoS) condition. The issue is due to the use of an insecure parsing function on non-NUL-terminated data without adequate bounds checks.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-170 · Improper Null Termination