CVE-2026-64116
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 < c7e8971abd70e9d022f1c251ba2508f8dc7f2db8 | affected |
| Linux | Linux | 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 < 09cbfd4b81ae90963dadb1de99b63b702e73290a | affected |
| Linux | Linux | 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 < 1dca7e491f070ac49b3d934f16ee953a53b37f38 | affected |
| Linux | Linux | 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 < 902daac307eb7e1955ce05b071950f3cba88c963 | affected |
| Linux | Linux | 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 < abdd03229414b5a52943b65a60f34b84cea5ac59 | affected |
| Linux | Linux | 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 < cf75eb6617042c8cff6112daeed7791809fc9dd2 | affected |
| Linux | Linux | 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 < d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9 | affected |
| Linux | Linux | 5.15 | affected |
| Linux | Linux | 0 < 5.15 | unaffected |
| Linux | Linux | 5.15.210 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.176 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.143 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.92 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.34 <= 6.18.* | unaffected |
| Linux | Linux | 7.0.11 <= 7.0.* | unaffected |
| Linux | Linux | 7.1 <= * | unaffected |
Weaknesses
References
- 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
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