CVE-2024-27417: ipv6: fix potential "struct net" leak in inet6_rtm_getaddr()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-17 · updated 2026-06-17
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix potential "struct net" leak in inet6_rtm_getaddr() It seems that if userspace provides a correct IFA_TARGET_NETNSID value but no IFA_ADDRESS and IFA_LOCAL attributes, inet6_rtm_getaddr() returns -EINVAL with an elevated "struct net" refcount.

Affected products

Debian Linux: 10.0
Linux kernel: from 4.20 before 5.4.271; from 5.5 before 5.10.212; from 5.11 before 5.15.151; from 5.16 before 6.1.81; from 6.2 before 6.6.21; from 6.7 before 6.7.9 — fixed in 5.10.212, 5.15.151, 5.4.271, 6.1.81, 6.6.21, 6.7.9

How to fix

Upgrade to a fixed version: Linux kernel 5.10.212, 5.15.151, 5.4.271, 6.1.81. Check the vendor advisory for mitigations.

References

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