PT-2026-61433 · Linux · Linux

CVE-2026-64116 · Published 2026-07-19 · Updated 2026-07-19

NVD

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Fix

Related Identifiers

CVE-2026-64116

Affected Products

Linux

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-64116 · Security Note
• https://git.kernel.org/stable/c/09cbfd4b81ae90963dadb1de99b63b702e73290a · Note
• https://git.kernel.org/stable/c/902daac307eb7e1955ce05b071950f3cba88c963 · Note
• https://git.kernel.org/stable/c/d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9 · Note
• https://git.kernel.org/stable/c/c7e8971abd70e9d022f1c251ba2508f8dc7f2db8 · Note
• https://git.kernel.org/stable/c/1dca7e491f070ac49b3d934f16ee953a53b37f38 · Note
• https://git.kernel.org/stable/c/cf75eb6617042c8cff6112daeed7791809fc9dd2 · Note
• https://git.kernel.org/stable/c/abdd03229414b5a52943b65a60f34b84cea5ac59 · Note