CVE-2026-64116
ipv6: ioam: add NULL check for idev in ipv6_hop_ioam()
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
5.15
References 7
git.kernel.org
- stable/c/c7e8971abd70e9d022f1c251ba2508f8dc7f2db8
- stable/c/09cbfd4b81ae90963dadb1de99b63b702e73290a
- stable/c/1dca7e491f070ac49b3d934f16ee953a53b37f38
- stable/c/902daac307eb7e1955ce05b071950f3cba88c963
- stable/c/abdd03229414b5a52943b65a60f34b84cea5ac59
- stable/c/cf75eb6617042c8cff6112daeed7791809fc9dd2
- stable/c/d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9