ipv6: add NULL checks for idev in SRv6 paths

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Summary

CVECVE-2026-23442
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-03 16:16:28 UTC
Updated2026-04-23 20:58:55 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ipv6: add NULL checks for idev in SRv6 paths __in6_dev_get() can return NULL when the device has no IPv6 configuration (e.g. MTU < IPV6_MIN_MTU or after NETDEV_UNREGISTER). Add NULL checks for idev returned by __in6_dev_get() in both seg6_hmac_validate_skb() and ipv6_srh_rcv() to prevent potential NULL pointer dereferences.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

EPSS: 0.000240000 probability, percentile 0.066820000 (date 2026-04-22)

Problem Types: CWE-476

CVSS v3.1 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1ababeba4a21f3dba3da3523c670b207fb2feb62 bc9843c39f9932a8b36efd1d362ea00bb88e4e78 git Not specified
CNA Linux Linux affected 1ababeba4a21f3dba3da3523c670b207fb2feb62 a25853c9feea7bbf31d157ff6e004d2d3b4f7f13 git Not specified
CNA Linux Linux affected 1ababeba4a21f3dba3da3523c670b207fb2feb62 06413793526251870e20402c39930804f14d59c0 git Not specified
CNA Linux Linux affected 4.10 Not specified
CNA Linux Linux unaffected 4.10 semver Not specified
CNA Linux Linux unaffected 6.12.83 6.12.* semver Not specified
CNA Linux Linux unaffected 6.19.10 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/bc9843c39f9932a8b36efd1d362ea00bb88e4e78 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a25853c9feea7bbf31d157ff6e004d2d3b4f7f13 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/06413793526251870e20402c39930804f14d59c0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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