ipv6: ioam: fix potential NULL dereferences in __ioam6_fill_trace_data()
CVE-2026-43101 · published 6 May 2026
How serious is it
- Severity: high, CVSS score 7.5 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-43101?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 to < 34b8390ac0ba57004b90ea568ac06f50bf896a80, 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 to < f87aa5d1a7f56727a768757613a303b4245444a1, 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 to < 4198aab6f000b4febb18ea820fea20634dd789c7, 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 to < 3719c234fa94c37c955b1ecd3742ef280ec135e6
- Linux Linux: 5.15
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/34b8390ac0ba57004b90ea568ac06f50bf896a80
- git.kernel.org/stable/c/f87aa5d1a7f56727a768757613a303b4245444a1
- git.kernel.org/stable/c/4198aab6f000b4febb18ea820fea20634dd789c7
- git.kernel.org/stable/c/3719c234fa94c37c955b1ecd3742ef280ec135e6
- git.kernel.org/stable/c/4e65a8b8daa18d63255ec58964dd192c7fdd9f8b
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON