---
cve: "CVE-2026-68433"
severity: "HIGH"
cvss: 8.6
epss: "30%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-08-12 00:17:43"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T09:12:31+02:00"
---

# CVE-2026-68433

> 8.6 HIGH

## Beschreibung

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

libceph: bound get_version reply decode to front len

handle_get_version_reply() uses msg->front_alloc_len as the decode
boundary for MON_GET_VERSION_REPLY.  That is the size of the reused
reply buffer, not the number of bytes actually received.

A truncated reply can therefore pass ceph_decode_need() and decode the
second u64 from stale tail bytes left in the buffer by an earlier
message, causing an uninitialized memory read.

Use msg->front.iov_len as the receive-side decode boundary, matching
other libceph reply handlers and limiting decoding to the bytes that
were actually read from the wire.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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 | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.265
- Kernel ≥ 5.15.216
- Kernel ≥ 6.1.183
- Kernel ≥ 6.6.148
- Kernel ≥ 6.12.101
- Kernel ≥ 6.18.42
- Kernel ≥ 7.1.6

## Referenzen

- <https://git.kernel.org/stable/c/1307028f082756bf453e1889aee9983d30643a4b>
- <https://git.kernel.org/stable/c/f6cbf6878f3a1503c872ba8f1e69a58ee68d8b2e>
- <https://git.kernel.org/stable/c/72a35070fcefa229b1b031aa7482ad3788e18f07>
- <https://git.kernel.org/stable/c/340e0386aa39da181015bee38f309018c335ce16>
- <https://git.kernel.org/stable/c/d60de8253c85a02d0e6194b0735e7a562981a04c>
- <https://git.kernel.org/stable/c/4e7ebfaa0d14cf50e44041bfde38070d6dbc019f>
- <https://git.kernel.org/stable/c/0d934c934ec746d53fc7e4f53239792647bbae63>
- <https://git.kernel.org/stable/c/d3c32939fa0e3ee9b883b9a0fd1972c5c444e3d0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-68433) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_