Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-05-08T00:00:00 kernel: ipv6: prevent possible UaF in addrconf_permanent_addr() 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CWE-825

A flaw was found in the Linux kernel's IPv6 networking subsystem. Specifically, a Use-after-Free (UaF) vulnerability exists within the `addrconf_permanent_addr()` function. This issue arises when the system attempts to access an IPv6 address after it has been freed, which could allow an attacker to cause a denial of service or potentially execute arbitrary code.

Red Hat Enterprise Linux 10 Affected kernel Red Hat Enterprise Linux 6 Out of support scope kernel Red Hat Enterprise Linux 7 Affected kernel Red Hat Enterprise Linux 7 Affected kernel-rt Red Hat Enterprise Linux 8 Affected kernel Red Hat Enterprise Linux 8 Affected kernel-rt Red Hat Enterprise Linux 9 Affected kernel Red Hat Enterprise Linux 9 Affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-43339 https://nvd.nist.gov/vuln/detail/CVE-2026-43339 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43339.mbox