---
cve: "CVE-2026-80555"
severity: "HIGH"
cvss: 7.1
epss: "14%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-08-26 15:17:10"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T03:49:20+02:00"
---

# CVE-2026-80555

> 7.1 HIGH

## Beschreibung

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

s390/vfio_ccw: Free all memory if cp_init() fails

The routine cp_free() is called to unpin/free any memory once an I/O
is completed successfully, or if cp_prefetch() fails. But if cp_init()
fails, and cp->initialized is not enabled, the same routine cannot be
used to free all the memory.

An attempt to address this exists in ccwchain_handle_ccw(), where a
single call to ccwchain_free() is made for the currently-processed
CCW segment. But this will leak other segments (created as a result
of a Transfer in Channel) that had been allocated as part of the same
channel program.

Address this by performing the cleanup outside of the recursive
ccwchain_handle_ccw()/ccwchain_loop_tic() logic.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.267
- Kernel ≥ 5.15.218
- Kernel ≥ 6.1.185
- Kernel ≥ 6.6.154
- Kernel ≥ 6.12.105
- Kernel ≥ 6.18.46
- Kernel ≥ 7.1.10

## Referenzen

- <https://git.kernel.org/stable/c/276bd7ed34d56c48c65c43c0b08f2ee77029b2fa>
- <https://git.kernel.org/stable/c/f9bcff265556796834122f95de16d52a8375206c>
- <https://git.kernel.org/stable/c/17e01e342af74de12899c206dcc9ec90684703aa>
- <https://git.kernel.org/stable/c/152fcb74a26804b70909381c6acc90595a0ae1c1>
- <https://git.kernel.org/stable/c/6a917199aaf97904f5619afe3dfdacb155b03e8c>
- <https://git.kernel.org/stable/c/32e3d364a7b8295120d37e6a6bd433d2de26f748>
- <https://git.kernel.org/stable/c/4699b54fada156534cbb39834d47fc9374d7a1f5>
- <https://git.kernel.org/stable/c/74186c2968f8f756ac3226b545b598457c910c75>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-80555) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_