High 7.5Published Jul 19, 2026

CVE-2026-64116ipv6: ioam: add NULL check for idev in ipv6_hop_ioam()

Updated under an hour ago (Oct 27, 2026, 9:40 AM ET)

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Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 before c7e8971abd70e9d022f1c251ba2508f8dc7f2db8; 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 builds before 09cbfd4b81ae90963dadb1de99b63b702e73290a; 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 builds before 1dca7e491f070ac49b3d934f16ee953a53b37f38; from 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 before 902daac307eb7e1955ce05b071950f3cba88c963; from 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 before abdd03229414b5a52943b65a60f34b84cea5ac59; from 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 before cf75eb6617042c8cff6112daeed7791809fc9dd2; from 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 before d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9	CNA record
linux linux_kernel linux:linux_kernel	from 5.15 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.92; from 6.13 before 6.18.34; from 6.19 before 7.0.11; 7.1; 7.1; and 2 more ranges	NVD

References

References

https://git.kernel.org/stable/c/c7e8971abd70e9d022f1c251ba2508f8dc7f2db8	patch
https://git.kernel.org/stable/c/09cbfd4b81ae90963dadb1de99b63b702e73290a	patch
https://git.kernel.org/stable/c/1dca7e491f070ac49b3d934f16ee953a53b37f38	patch
https://git.kernel.org/stable/c/902daac307eb7e1955ce05b071950f3cba88c963	patch
https://git.kernel.org/stable/c/abdd03229414b5a52943b65a60f34b84cea5ac59	patch
https://git.kernel.org/stable/c/cf75eb6617042c8cff6112daeed7791809fc9dd2	patch
https://git.kernel.org/stable/c/d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.