CVE-2026-43339

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-43339

Key Details

CVE	CVE-2026-43339
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel
Classified as	CWE-416 (Use After Free)

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

ipv6: prevent possible UaF in addrconf_permanent_addr()

The mentioned helper try to warn the user about an exceptional

condition, but the message is delivered too late, accessing the ipv6

after its possible deletion.

Reorder the statement to avoid the possible UaF; while at it, place the

warning outside the idev->lock as it needs no protection. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-43339
CVE	https://www.cve.org/CVERecord?id=CVE-2026-43339

Source

Reference

NVD

CVE