CVE-2026-52985

MediumCVSS 5.5/10Last modified Jul 14, 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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-908

Affected software

No affected versions have been published.

Timeline

Published
Jun 24, 2026
Last modified
Jul 14, 2026
NVD status
Analyzed

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CVE-2026-52985: Medium severity, CVSS 5.5 | Vulnix