Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: ioam: add NULL check for idev in ipv6_hop_ioam() Reported by Sashiko: The function ipv6_hop_ioam() accesses __in6_dev_get(skb->dev)->cnf.ioam6_enabled without validating the returned idev pointer. Because addrconf_ifdown() can concurrently clear dev->ip6_ptr via RCU, __in6_dev_get() can return NULL during interface teardown, which could cause a NULL pointer dereference when processing an IOAM Hop-by-Hop option. Let's add a check and use SKB_DROP_REASON_IPV6DISABLED accordingly.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.15, < 5.15.210 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/09cbfd4b81ae90963dadb1de99b63b702e73290aPatch
- https://git.kernel.org/stable/c/1dca7e491f070ac49b3d934f16ee953a53b37f38Patch
- https://git.kernel.org/stable/c/902daac307eb7e1955ce05b071950f3cba88c963Patch
- https://git.kernel.org/stable/c/abdd03229414b5a52943b65a60f34b84cea5ac59Patch
- https://git.kernel.org/stable/c/c7e8971abd70e9d022f1c251ba2508f8dc7f2db8Patch
- https://git.kernel.org/stable/c/cf75eb6617042c8cff6112daeed7791809fc9dd2Patch
- https://git.kernel.org/stable/c/d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9Patch
FAQ
What is CVE-2026-64116?
CVE-2026-64116 is a vulnerability with a CVSS score of 7.5 (HIGH). In the Linux kernel, the following vulnerability has been resolved: ipv6: ioam: add NULL check for idev in ipv6_hop_ioam() Reported by Sashiko: The function ipv6_hop_ioam() accesses __in6_dev_get(s...
How severe is CVE-2026-64116?
CVE-2026-64116 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-64116?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.