CVE-2026-52985
Published: June 26, 2026Last modified: June 26, 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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.175-r0) |
| 25 LTS | linux-lts | Fixed (6.12.92-r0) | |
| Stream | linux-lts | Fixed (6.18.35-r1) |
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