High 7.8Published May 8, 2026

CVE-2026-43339ipv6: prevent possible UaF in addrconf_permanent_addr()

Updated under an hour ago (Oct 27, 2026, 3:23 PM ET)

Does this affect you?

It affects Linux and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac before eec49a33611f20336b357b3953df44f1a02049e8; from f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac before bacc7f31085c9820922f00bc7d79756ffa13123a; from f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac before 7bfafa1b0cd582983ebec6bb20f0a435528fe567; from f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac before 7d9f2f4aabd116ca68fbdab5d8fb8dac74c2ea1e; from f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac before 25357b670afb5b517096da783abaa5cc4bf8359e; from f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac before 3cd4efb5df72843dfac892d0b3c7a4a8bd926b65; from f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac before 2d88ed7fa000e19c2dc0fa31b3a849e3f5bca5c1; from f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac before fd63f185979b047fb22a0dfc6bd94d0cab6a6a70	CNA record
linux linux_kernel linux:linux_kernel	from 4.6 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.168; from 6.2 before 6.6.134; from 6.7 before 6.12.81; from 6.13 before 6.18.22; from 6.19 before 6.19.12; 7.0; and 6 more ranges	NVD

References

References

https://git.kernel.org/stable/c/eec49a33611f20336b357b3953df44f1a02049e8	patch
https://git.kernel.org/stable/c/bacc7f31085c9820922f00bc7d79756ffa13123a	patch
https://git.kernel.org/stable/c/7bfafa1b0cd582983ebec6bb20f0a435528fe567	patch
https://git.kernel.org/stable/c/7d9f2f4aabd116ca68fbdab5d8fb8dac74c2ea1e	patch
https://git.kernel.org/stable/c/25357b670afb5b517096da783abaa5cc4bf8359e	patch
https://git.kernel.org/stable/c/3cd4efb5df72843dfac892d0b3c7a4a8bd926b65	patch
https://git.kernel.org/stable/c/2d88ed7fa000e19c2dc0fa31b3a849e3f5bca5c1	patch
https://git.kernel.org/stable/c/fd63f185979b047fb22a0dfc6bd94d0cab6a6a70	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.