---
cve: "CVE-2025-37778"
severity: "CRITICAL"
cvss: 9.8
epss: "1.1%"
vendor: "Linux"
kev: false
exploited: false
published: "2025-05-01 14:15:41"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T00:32:52+02:00"
---

# CVE-2025-37778

> 9.8 CRITICAL

## Beschreibung

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

ksmbd: Fix dangling pointer in krb_authenticate

krb_authenticate frees sess->user and does not set the pointer
to NULL. It calls ksmbd_krb5_authenticate to reinitialise
sess->user but that function may return without doing so. If
that happens then smb2_sess_setup, which calls krb_authenticate,
will be accessing free'd memory when it later uses sess->user.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| 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 ≥ 5.15.203
- Kernel ≥ 6.1.135
- Kernel ≥ 6.6.88
- Kernel ≥ 6.12.25
- Kernel ≥ 6.14.4

## Referenzen

- <https://git.kernel.org/stable/c/b61f04d5d73c53d183019bafe22fb700a739bac5>
- <https://git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10>
- <https://git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325>
- <https://git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364e>
- <https://git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6>
- <https://git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5f>
- <https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-37778) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_