Is CVE-2026-53294 in the CISA KEV catalog?

No. CVE-2026-53294 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-53294?

CVE-2026-53294 has a CVSS v3 base score of 5.5 (Moderate).

What is the EPSS score for CVE-2026-53294?

CVE-2026-53294 has an EPSS score of 0.18% (7th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-53294?

Upgrade linux on debian 11 to 5.10.259-1 or later.

CVE & CISA-KEV Catalog

CVE-2026-53294

MEDIUM

5.5

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: mailbox: mailbox-test: don't free the reused channel The RX channel can be aliased to the TX channel if it has a different MMIO. This special case needs to be handled when freeing the channels otherwise a double-free occurs.

How to fix

Remediation Available

linuxDebian

Fixed in:5.10.259-1CVE-2026-53294

Fixed in:6.1.176-1CVE-2026-53294

Fixed in:6.12.94-1CVE-2026-53294

Fixed in:7.0.10-1CVE-2026-53294

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.18%probability of exploitation in 30 days

7thpercentile

Low risk: more likely to be exploited than 7% of all known CVEs.

References

Other references8

Embed a live status badge for CVE-2026-53294

Markdown

[![CVE-2026-53294](https://tridentstack.com/cve/badge/CVE-2026-53294.svg)](https://tridentstack.com/cve/CVE-2026-53294)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-53294"><img src="https://tridentstack.com/cve/badge/CVE-2026-53294.svg" alt="CVE-2026-53294"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-30.