Is CVE-2026-53020 in the CISA KEV catalog?

No. CVE-2026-53020 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-53020?

CVE-2026-53020 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2026-53020?

CVE-2026-53020 has an EPSS score of 0.12% (2th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-53020?

Upgrade linux on debian unstable to 7.0.10-1 or later.

CVE & CISA-KEV Catalog

CVE-2026-53020

HIGH

7.8

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: um: Fix potential race condition in TLB sync During the TLB sync, we need to traverse and modify the page table, so we should hold the page table lock. Since full SMP support for threads within the same process is still missing, let's disable the split page table lock for simplicity.

How to fix

Remediation Available

linuxDebian

Fixed in:7.0.10-1CVE-2026-53020

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

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.12%probability of exploitation in 30 days

2ndpercentile

Low risk: more likely to be exploited than 2% of all known CVEs.

References

Other references2

Embed a live status badge for CVE-2026-53020

Markdown

[![CVE-2026-53020](https://tridentstack.com/cve/badge/CVE-2026-53020.svg)](https://tridentstack.com/cve/CVE-2026-53020)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-53020"><img src="https://tridentstack.com/cve/badge/CVE-2026-53020.svg" alt="CVE-2026-53020"></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 2026-06-28.