Riskcovery

CVE-2026-43339

ipv6: prevent possible UaF in addrconf_permanent_addr()

State
Published
Severity
7.8 High
Published
May 8, 2026
Updated
Oct 19, 2026
Reserved
May 1, 2026

Read the record on cve.org

Description

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.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac to before eec49a33611f20336b357b3953df44f1a02049e8Affected
  • f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac to before bacc7f31085c9820922f00bc7d79756ffa13123aAffected
  • f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac to before 7bfafa1b0cd582983ebec6bb20f0a435528fe567Affected
  • f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac to before 7d9f2f4aabd116ca68fbdab5d8fb8dac74c2ea1eAffected
  • f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac to before 25357b670afb5b517096da783abaa5cc4bf8359eAffected
  • f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac to before 3cd4efb5df72843dfac892d0b3c7a4a8bd926b65Affected
  • f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac to before 2d88ed7fa000e19c2dc0fa31b3a849e3f5bca5c1Affected
  • f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac to before fd63f185979b047fb22a0dfc6bd94d0cab6a6a70Affected
LinuxLinux
  • 4.6Affected
  • before 4.6Not affected
  • 5.10.253 through 5.10.*Not affected
  • 5.15.203 through 5.15.*Not affected
  • 6.1.168 through 6.1.*Not affected
  • 6.6.134 through 6.6.*Not affected
  • 6.12.81 through 6.12.*Not affected
  • 6.18.22 through 6.18.*Not affected
  • 6.19.12 through 6.19.*Not affected
  • 7.0 and laterNot affected

References

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