Bug 2492426 (CVE-2026-53020) - CVE-2026-53020 kernel: um: Fix potential race condition in TLB sync
Summary: CVE-2026-53020 kernel: um: Fix potential race condition in TLB sync
Keywords:
Status: NEW
Alias: CVE-2026-53020
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-24 18:11 UTC by OSIDB Bzimport
Modified: 2026-06-26 11:56 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-06-24 18:11:26 UTC 
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.
Comment 1 Mauro Matteo Cascella 2026-06-26 11:51:21 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062452-CVE-2026-53020-6e28@gregkh/T
Note You need to log in before you can comment on or make changes to this bug.