---
cve: "CVE-2026-80689"
severity: "LOW"
cvss: 3.1
epss: "2.7%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-08-28 08:16:54"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-04T00:11:38+02:00"
---

# CVE-2026-80689

> 3.1 LOW

## Beschreibung

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

tracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions

mmio_trace_rw() and mmio_trace_mapping() retrieve mmio_trace_array into
tr and pass it to __trace_mmiotrace_rw() and __trace_mmiotrace_map().
If these functions are invoked while mmio_trace_array is NULL (e.g. before
initialization or after disabled), accessing tr->array_buffer.buffer will
result in a NULL pointer dereference crash.

Fix this by adding an explicit NULL check for tr at the beginning of
__trace_mmiotrace_rw() and __trace_mmiotrace_map().

## Patch verfügbar (OSV)

- Kernel ≥ 6.12.103
- Kernel ≥ 6.18.44
- Kernel ≥ 7.1.8

## Referenzen

- <https://git.kernel.org/stable/c/876014b4eeb927146430e7591cf959a7ceb8d64a>
- <https://git.kernel.org/stable/c/a20a0010eb6485f60cd64e15ebc85a4bd388642e>
- <https://git.kernel.org/stable/c/60234845142fddb27db89ebc00a65178421fb3a4>
- <https://git.kernel.org/stable/c/12b80cdbc54cf615b4717a4e8180063408091ea2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-80689) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_