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CVE-2026-64116

ipv6: ioam: add NULL check for idev in ipv6_hop_ioam() PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
Linux / Linuxaffected 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 before c7e8971abd70e9d022f1c251ba2508f8dc7f2db8; affected 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 before 09cbfd4b81ae90963dadb1de99b63b702e73290a; affected 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 before 1dca7e491f070ac49b3d934f16ee953a53b37f38; affected 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 before 902daac307eb7e1955ce05b071950f3cba88c963; affected 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 before abdd03229414b5a52943b65a60f34b84cea5ac59; affected 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 before cf75eb6617042c8cff6112daeed7791809fc9dd2; affected 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 before d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9
Linux / Linuxaffected 5.15; unaffected 0 before 5.15; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.92 through 6.12.*; unaffected 6.18.34 through 6.18.*; unaffected 7.0.11 through 7.0.*; unaffected 7.1 through *

CWE

No CWE identifiers supplied.

References