---
cve: "CVE-2025-40253"
severity: "HIGH"
cvss: 8.8
epss: "29%"
vendor: "Linux"
kev: false
exploited: false
published: "2025-12-04 16:16:18"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T02:25:07+02:00"
---

# CVE-2025-40253

> 8.8 HIGH

## Beschreibung

In the Linux kernel, the following vulnerability has been resolved:

s390/ctcm: Fix double-kfree

The function 'mpc_rcvd_sweep_req(mpcginfo)' is called conditionally
from function 'ctcmpc_unpack_skb'. It frees passed mpcginfo.
After that a call to function 'kfree' in function 'ctcmpc_unpack_skb'
frees it again.

Remove 'kfree' call in function 'mpc_rcvd_sweep_req(mpcginfo)'.

Bug detected by the clang static analyzer.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Benachbart | warn |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 5.4.302
- Kernel ≥ 5.10.247
- Kernel ≥ 5.15.197
- Kernel ≥ 6.1.159
- Kernel ≥ 6.6.118
- Kernel ≥ 6.12.60
- Kernel ≥ 6.17.10

## Referenzen

- <https://git.kernel.org/stable/c/06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2>
- <https://git.kernel.org/stable/c/6bf8ccaabce8cebb6cb1f255c93d0acdfe95c17a>
- <https://git.kernel.org/stable/c/7616e2eee679746d526c7f5befd4eedb995935b5>
- <https://git.kernel.org/stable/c/43096dab8cc60fc39133205fd149a54d3acebea8>
- <https://git.kernel.org/stable/c/3b177b2ded563df16f6d5920671ffcfe5915d472>
- <https://git.kernel.org/stable/c/b9dbfb1b5699f9f1e4991f96741bdf9047147589>
- <https://git.kernel.org/stable/c/7ff76f8dc6b550f8d16487bf3cebc278be720b5c>
- <https://git.kernel.org/stable/c/da02a1824884d6c84c5e5b5ac373b0c9e3288ec2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-40253) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_