CVE-2026-53349

medium Red Hat
CVSS v3 Base Score
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Characteristics
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: July 1, 2026 (8 days ago)
Last Modified: July 1, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in the Linux kernel's netfilter component, specifically within `nf_conntrack`. When Network Address Translation (NAT) helpers are unregistered, a pending expectation can retain a pointer to freed module memory. If a connection matching this expectation arrives after the module is unloaded, the system may attempt to execute code from the freed memory, leading to a system crash (Denial of Service). Exploitation of this vulnerability requires specific privileges to unload NAT helper modules.

CWE

CWE-825

Affected Products

Red Hat Enterprise Linux 10Red Hat Enterprise Linux 6Red Hat Enterprise Linux 7Red Hat Enterprise Linux 8Red Hat Enterprise Linux 9

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 lore.kernel.org