---
cve: "CVE-2026-64597"
severity: "CRITICAL"
cvss: 9.8
epss: "36%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-08-06 08:16:35"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-09T15:41:00+02:00"
---

# CVE-2026-64597

> 9.8 CRITICAL

## Beschreibung

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

smb: client: fix double-free in SMB2_close() replay

A response-bearing attempt can return a replayable error and free its
response buffer. If SMB2_close_init() fails before the next send, cleanup
retains the previous buffer type and frees that response again.

Reset response bookkeeping before each attempt to prevent the stale free.

## 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 ≥ 6.6.145
- Kernel ≥ 6.12.96
- Kernel ≥ 6.18.39
- Kernel ≥ 7.1.4

## Referenzen

- <https://git.kernel.org/stable/c/037511726228aaf165c7067ff2bfc88eaecdf1f3>
- <https://git.kernel.org/stable/c/0aa97edf7c347c0f54e7e60c4740574b8120c66a>
- <https://git.kernel.org/stable/c/d15d83125007f673aec4323e1bbbaaffbe87ea13>
- <https://git.kernel.org/stable/c/b18ed621dbfceecea5539848cddcb9272c9a61e1>
- <https://git.kernel.org/stable/c/f96e1cdcb63ed3321142ff2fcdf784e32cda8fee>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-64597) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_