CVE-2026-52985
netdevsim: zero initialize struct iphdr in dummy sk_buff
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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: 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.
Timeline
- CVE published
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
5.4
References 8
git.kernel.org
- stable/c/175556c049eaec14efde8c6475e763b7579b9de7
- stable/c/6e2cfd0904976e701d7a76b86b694e72af230ab0
- stable/c/1b7b6ae0e93b8d512e208b1378d74af052e4f4e7
- stable/c/818f7673ed7f4a29d4b9cee8184c47d6e57162b4
- stable/c/978ca6ff789f1f19c03288ac20cc1f4774e88490
- stable/c/750d0091bebf44975421268d37484ef87060d263
- stable/c/bc6002865e8c4fcf9e94975f7cf023448d8764e2
- stable/c/35eaa6d8d6c2ee65e96f507add856e0eacf24591