CVE-2026-64116
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.
Metadata
Severity & Metrics
No CVSS data available.
Affected products (2)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| Linux | Linux | — | 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 < c7e8971abd70e9d022f1c251ba2508f8dc7f2db8, 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 < 09cbfd4b81ae90963dadb1de99b63b702e73290a, 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 < 1dca7e491f070ac49b3d934f16ee953a53b37f38, 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 < 902daac307eb7e1955ce05b071950f3cba88c963 … |
| Linux | Linux | — | 5.15, 0 < 5.15, 5.15.210 ≤ 5.15.*, 6.1.176 ≤ 6.1.* … |
References (7)
- https://git.kernel.org/stable/c/c7e8971abd70e9d022f1c251ba2508f8dc7f2db8
- https://git.kernel.org/stable/c/09cbfd4b81ae90963dadb1de99b63b702e73290a
- https://git.kernel.org/stable/c/1dca7e491f070ac49b3d934f16ee953a53b37f38
- https://git.kernel.org/stable/c/902daac307eb7e1955ce05b071950f3cba88c963
- https://git.kernel.org/stable/c/abdd03229414b5a52943b65a60f34b84cea5ac59
- https://git.kernel.org/stable/c/cf75eb6617042c8cff6112daeed7791809fc9dd2
- https://git.kernel.org/stable/c/d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9