ipv6: ioam: add NULL check for idev in ipv6_hop_ioam()
Summary
| CVE | CVE-2026-64116 |
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| State | PUBLISHED |
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| Assigner | Linux |
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| Source Priority | CVE Program / NVD first with legacy fallback |
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| Published | 2026-07-19 16:17:53 UTC |
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| Updated | 2026-07-19 16:17:53 UTC |
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| 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. |
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Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 c7e8971abd70e9d022f1c251ba2508f8dc7f2db8 git |
Not specified |
| CNA |
Linux |
Linux |
affected 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 09cbfd4b81ae90963dadb1de99b63b702e73290a git |
Not specified |
| CNA |
Linux |
Linux |
affected 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 1dca7e491f070ac49b3d934f16ee953a53b37f38 git |
Not specified |
| CNA |
Linux |
Linux |
affected 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 902daac307eb7e1955ce05b071950f3cba88c963 git |
Not specified |
| CNA |
Linux |
Linux |
affected 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 abdd03229414b5a52943b65a60f34b84cea5ac59 git |
Not specified |
| CNA |
Linux |
Linux |
affected 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 cf75eb6617042c8cff6112daeed7791809fc9dd2 git |
Not specified |
| CNA |
Linux |
Linux |
affected 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9 git |
Not specified |
| CNA |
Linux |
Linux |
affected 5.15 |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.15 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.15.210 5.15.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.1.176 6.1.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.143 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.92 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.34 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.0.11 7.0.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.1 * original_commit_for_fix |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/902daac307eb7e1955ce05b071950f3cba88c963 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/abdd03229414b5a52943b65a60f34b84cea5ac59 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/c7e8971abd70e9d022f1c251ba2508f8dc7f2db8 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/1dca7e491f070ac49b3d934f16ee953a53b37f38 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/cf75eb6617042c8cff6112daeed7791809fc9dd2 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/09cbfd4b81ae90963dadb1de99b63b702e73290a |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.
