ipv6: prevent possible UaF in addrconf_permanent_addr()

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Summary

CVECVE-2026-43339
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-08 14:16:43 UTC
Updated2026-05-11 08:16:10 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000240000 probability, percentile 0.070400000 (date 2026-05-10)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac eec49a33611f20336b357b3953df44f1a02049e8 git Not specified
CNA Linux Linux affected f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac bacc7f31085c9820922f00bc7d79756ffa13123a git Not specified
CNA Linux Linux affected f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac 7bfafa1b0cd582983ebec6bb20f0a435528fe567 git Not specified
CNA Linux Linux affected f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac 7d9f2f4aabd116ca68fbdab5d8fb8dac74c2ea1e git Not specified
CNA Linux Linux affected f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac 25357b670afb5b517096da783abaa5cc4bf8359e git Not specified
CNA Linux Linux affected f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac 3cd4efb5df72843dfac892d0b3c7a4a8bd926b65 git Not specified
CNA Linux Linux affected f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac 2d88ed7fa000e19c2dc0fa31b3a849e3f5bca5c1 git Not specified
CNA Linux Linux affected f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac fd63f185979b047fb22a0dfc6bd94d0cab6a6a70 git Not specified
CNA Linux Linux affected 4.6 Not specified
CNA Linux Linux unaffected 4.6 semver Not specified
CNA Linux Linux unaffected 5.10.253 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.203 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.168 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.134 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.81 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.22 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.12 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/eec49a33611f20336b357b3953df44f1a02049e8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7d9f2f4aabd116ca68fbdab5d8fb8dac74c2ea1e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fd63f185979b047fb22a0dfc6bd94d0cab6a6a70 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bacc7f31085c9820922f00bc7d79756ffa13123a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/25357b670afb5b517096da783abaa5cc4bf8359e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2d88ed7fa000e19c2dc0fa31b3a849e3f5bca5c1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7bfafa1b0cd582983ebec6bb20f0a435528fe567 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3cd4efb5df72843dfac892d0b3c7a4a8bd926b65 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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