CVE-2026-31414
kernel: Linux kernel (netfilter): Denial of Service via unsafe connection tracking helper operations
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 13, 2026
Updated · July 3, 2026
Description
A flaw was found in the Linux kernel's netfilter component. This vulnerability allows a local attacker with low privileges to cause a denial of service (DoS). The issue arises from the improper handling of network connection tracking expectations, where a helper function was used unsafely without the necessary safeguards. This could lead to system instability or unresponsiveness.
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 · 5.8CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
CWE-911 · Improper Update of Reference Count