What’s Vulnerable › Vulnerabilities

CVE-2026-80646: ipv6: guard against possible NULL deref in __in6_dev_stats_get()

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: guard against possible NULL deref in __in6_dev_stats_get() dev_get_by_index_rcu() could return NULL if the original physical device is unregistered. Found by Sashiko.

Affected products

• Linux kernel: from 4.19.291 before 4.20; 5.2 — fixed in 4.20, 7.2

How to fix

Upgrade to a fixed version: Linux kernel 4.20, 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0db1949084e85a72d174a7dea3259b94fe5a9305
• https://git.kernel.org/stable/c/1a4adfbeb47a212a64539137411f1ca168474d33
• https://git.kernel.org/stable/c/1e3db30a88815bae6e9d5db6f64ac735e615a07e
• https://git.kernel.org/stable/c/507541c2a8eeb76c02bd2511958f73a8cfa3e1bc
• https://git.kernel.org/stable/c/952426a83ca75cea25c09d58944abafaa3ebd242
• https://git.kernel.org/stable/c/a23f2c68c6635e41404f189f8f7ae910738cebdb
• https://git.kernel.org/stable/c/e14db43677946bf2095febd294bb3c13ab375ab7
• https://git.kernel.org/stable/c/fc920c0659cdea5afd8721c1155a51564859e075

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