CVE-2026-52985
Published Jun 24, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: netdevsim: zero initialize struct iphdr in dummy sk_buff Syzbot reports a KMSAN uninit-value originating from nsim_dev_trap_skb_build, with the allocation also being performed in the same function. Fix this by calling skb_put_zero instead of skb_put to guarantee zero initialization of the whole IP header.
EPSS — Exploit Prediction
0.0018
Probability of exploitation
0.07%
Percentile rank
EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.
References
Other References
https://git.kernel.org/stable/c/175556c049eaec14efde8c6475e763b7579b9de7
https://git.kernel.org/stable/c/1b7b6ae0e93b8d512e208b1378d74af052e4f4e7
https://git.kernel.org/stable/c/35eaa6d8d6c2ee65e96f507add856e0eacf24591
https://git.kernel.org/stable/c/6e2cfd0904976e701d7a76b86b694e72af230ab0
https://git.kernel.org/stable/c/750d0091bebf44975421268d37484ef87060d263
https://git.kernel.org/stable/c/818f7673ed7f4a29d4b9cee8184c47d6e57162b4
https://git.kernel.org/stable/c/978ca6ff789f1f19c03288ac20cc1f4774e88490
https://git.kernel.org/stable/c/bc6002865e8c4fcf9e94975f7cf023448d8764e2
Frequently Asked Questions
What is CVE-2026-52985? +
In the Linux kernel, the following vulnerability has been resolved:
netdevsim: zero initialize struct iphdr in dummy sk_buff
Syzbot reports a KMSAN uninit-value originating from
nsim_dev_trap_skb_build, with the allocation also
being performed in the same function.
Fix this by calling skb_put_zero instead of skb_put to
guarantee zero initialization of the whole IP header.
How do I check if I'm vulnerable to CVE-2026-52985? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.