CVE-2026-43101 ipv6: ioam: fix potential NULL dereferences in __ioam6_fill_trace_data()
A missing NULL check in the Linux kernel IPv6 IOAM module can cause a system crash, requiring a kernel patch.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-43101?
CVE-2026-43101 is a high-severity vulnerability in Linux kernel, published on 6 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ipv6: ioam: fix potential NULL dereferences in __ioam6_fill_trace_data()
We need to check __in6_dev_get() for possible NULL value, as suggested by Yiming Qian.
Also add skb_dst_dev_rcu() instead of skb_dst_dev(), and two missing READ_ONCE().
Note that @dev can't be NULL.
Weakness: CWE-476
Which versions are affected by CVE-2026-43101?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43101?
Apply the vendor's patch.
Is CVE-2026-43101 being exploited?
There is no known exploitation of CVE-2026-43101 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-85920, BELL-CVE-2026-43101, DEBIAN-CVE-2026-43101, GHSA-r529-g827-7gf5, ROOT-OS-DEBIAN-12-CVE-2026-43101, ROOT-OS-DEBIAN-13-CVE-2026-43101 and 3 more.