CVE-2026-52985 Details
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.
A vulnerability exists in the Linux kernel's netdevsim module, where the IP header in a dummy socket buffer is not properly initialized. This issue, reported by Syzbot, stems from an uninitialized value that could lead to undefined behavior. The vulnerability affects the stable versions of the Linux kernel.
Users can apply the latest patch available in the Linux kernel stable tree, which modifies the IP header allocation to ensure proper zero initialization. Instructions for downloading this patch are available in the Git commit details.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/175556c049eaec14efde8c6475e763b7579b9de7 | kernel.org | Patch |
| https://git.kernel.org/stable/c/1b7b6ae0e93b8d512e208b1378d74af052e4f4e7 | kernel.org | Patch |
| https://git.kernel.org/stable/c/35eaa6d8d6c2ee65e96f507add856e0eacf24591 | kernel.org | Patch |
| https://git.kernel.org/stable/c/6e2cfd0904976e701d7a76b86b694e72af230ab0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/750d0091bebf44975421268d37484ef87060d263 | kernel.org | Patch |
| https://git.kernel.org/stable/c/818f7673ed7f4a29d4b9cee8184c47d6e57162b4 | kernel.org | Patch |
| https://git.kernel.org/stable/c/978ca6ff789f1f19c03288ac20cc1f4774e88490 | kernel.org | Patch |
| https://git.kernel.org/stable/c/bc6002865e8c4fcf9e94975f7cf023448d8764e2 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-908 | Use of Uninitialized Resource | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.4, < 5.10.258 >= 5.11, < 5.15.209 >= 5.16, < 6.1.175 >= 6.2, < 6.6.141 >= 6.7, < 6.12.91 >= 6.13, < 6.18.33 >= 6.19, < 7.0.10 7.1 rc1 |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 14, 2026 | Initial Analysis | [email protected] |
| Jun 24, 2026 | New CVE Received | kernel.org |