---
cve: "CVE-2025-39965"
severity: "HIGH"
cvss: 7.8
epss: "0.2%"
vendor: "Linux"
kev: false
exploited: false
published: "2025-10-13 14:15:34"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-29T22:11:49+02:00"
---

# CVE-2025-39965

> 7.8 HIGH

## Beschreibung

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

xfrm: xfrm_alloc_spi shouldn't use 0 as SPI

x->id.spi == 0 means "no SPI assigned", but since commit
94f39804d891 ("xfrm: Duplicate SPI Handling"), we now create states
and add them to the byspi list with this value.

__xfrm_state_delete doesn't remove those states from the byspi list,
since they shouldn't be there, and this shows up as a UAF the next
time we go through the byspi list.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- Kernel ≥ 6.6.109
- Kernel ≥ 6.12.50
- Kernel ≥ 6.16.10

## BSI-Hinweise (deutsch)

- [Linux Kernel: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2025-2268) — _BSI-Einstufung: hoch_
  Ein lokaler Angreifer kann mehrere Schwachstellen in Linux Kernel ausnutzen, um Daten zu manipulieren oder einen Denial of Service herbeizuführen.

## Referenzen

- <https://git.kernel.org/stable/c/0baf92d0b1590b903c1f4ead75e61715e50e8146>
- <https://git.kernel.org/stable/c/9fcedabaae0096f712bbb4ccca6a8538af1cd1c8>
- <https://git.kernel.org/stable/c/a78e55776522373c446f18d5002a8de4b09e6bf7>
- <https://git.kernel.org/stable/c/cd8ae32e4e4652db55bce6b9c79267d8946765a9>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-39965) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_