CVE-2026-64116
ipv6: ioam: add NULL check for idev in ipv6_hop_ioam()
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.
INFO
Published Date :
July 19, 2026, 4:17 p.m.
Last Modified :
July 19, 2026, 4:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-64116
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Add a NULL check for the idev pointer.
- Validate the returned idev pointer before dereferencing.
- Handle NULL idev pointer by dropping the packet.
- Apply the provided patch to the Linux kernel.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64116.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64116 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64116
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64116 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64116 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '9ee11f0fff205b4b3df9750bff5e94f97c71b6a0', 'lessThan': 'c7e8971abd70e9d022f1c251ba2508f8dc7f2db8', 'versionType': 'git'}, {'status': 'affected', 'version': '9ee11f0fff205b4b3df9750bff5e94f97c71b6a0', 'lessThan': '09cbfd4b81ae90963dadb1de99b63b702e73290a', 'versionType': 'git'}, {'status': 'affected', 'version': '9ee11f0fff205b4b3df9750bff5e94f97c71b6a0', 'lessThan': '1dca7e491f070ac49b3d934f16ee953a53b37f38', 'versionType': 'git'}, {'status': 'affected', 'version': '9ee11f0fff205b4b3df9750bff5e94f97c71b6a0', 'lessThan': '902daac307eb7e1955ce05b071950f3cba88c963', 'versionType': 'git'}, {'status': 'affected', 'version': '9ee11f0fff205b4b3df9750bff5e94f97c71b6a0', 'lessThan': 'abdd03229414b5a52943b65a60f34b84cea5ac59', 'versionType': 'git'}, {'status': 'affected', 'version': '9ee11f0fff205b4b3df9750bff5e94f97c71b6a0', 'lessThan': 'cf75eb6617042c8cff6112daeed7791809fc9dd2', 'versionType': 'git'}, {'status': 'affected', 'version': '9ee11f0fff205b4b3df9750bff5e94f97c71b6a0', 'lessThan': 'd4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9', 'versionType': 'git'}], 'programFiles': ['net/ipv6/exthdrs.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.92', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.34', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/ipv6/exthdrs.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/09cbfd4b81ae90963dadb1de99b63b702e73290a Added Reference https://git.kernel.org/stable/c/1dca7e491f070ac49b3d934f16ee953a53b37f38 Added Reference https://git.kernel.org/stable/c/902daac307eb7e1955ce05b071950f3cba88c963 Added Reference https://git.kernel.org/stable/c/abdd03229414b5a52943b65a60f34b84cea5ac59 Added Reference https://git.kernel.org/stable/c/c7e8971abd70e9d022f1c251ba2508f8dc7f2db8 Added Reference https://git.kernel.org/stable/c/cf75eb6617042c8cff6112daeed7791809fc9dd2 Added Reference https://git.kernel.org/stable/c/d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9