CVE-2026-53020

um: Fix potential race condition in TLB sync

HIGH
7.8
CVSS Score
Published: June 24, 2026 at 04:29 PM UTC
Updated: August 5, 2026 at 01:24 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

6.19 ≤ v < 7.0.106.19 ≤ v < 7.11e4ee5135d814fe4785890790cec81c3132888fb6.19
Vendor states this is fixed in 102331b66bcaf1f41f50b9c4cd5c36e46bafa9f3 (fixed)
Vendor states this is fixed in f21c343ec7419377bff89ab11146c03ae117036f (fixed)
Vendor states this is fixed in 6.19 (unaffected)
Vendor states this is fixed in 7.0.10 (unaffected)
Vendor states this is fixed in 7.1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusANALYZED
CWE
CWE-362

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