CVE-2022-49672

net: tun: unlink NAPI from device on destruction

EPSS 0.3%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

26 Feb 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

In the Linux kernel, the following vulnerability has been resolved: net: tun: unlink NAPI from device on destruction Syzbot found a race between tun file and device destruction. NAPIs live in struct tun_file which can get destroyed before the netdev so we have to del them explicitly. The current code is missing deleting the NAPI if the queue was detached first.

Affected products

Linux · Linux

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References

https://git.kernel.org/stable/c/3b9bc84d311104906d2b4995a9a02d7b7ddab2db https://git.kernel.org/stable/c/8145f77d38de4f88b8a69e1463f5c09ba189d77c https://git.kernel.org/stable/c/82e729aee59acefe135fceffadcbc5b86dd4f1b9 https://git.kernel.org/stable/c/8661d4b8faa2f7ee7a559969c0a7c57f077b1728 https://git.kernel.org/stable/c/a8cf919022373c97a84fe596bbea544f909c485d https://git.kernel.org/stable/c/bec1be0a745ab420718217e3e0d9542a75108989