High 7.8Published Jun 24, 2026

CVE-2026-53020um: Fix potential race condition in TLB sync

Updated under an hour ago (Oct 28, 2026, 4:40 AM ET)

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 1e4ee5135d814fe4785890790cec81c3132888fb before f21c343ec7419377bff89ab11146c03ae117036f; from 1e4ee5135d814fe4785890790cec81c3132888fb before 102331b66bcaf1f41f50b9c4cd5c36e46bafa9f3	CNA record
linux linux_kernel linux:linux_kernel	from 6.19 before 7.0.10	NVD

References

References

https://git.kernel.org/stable/c/f21c343ec7419377bff89ab11146c03ae117036f	patch
https://git.kernel.org/stable/c/102331b66bcaf1f41f50b9c4cd5c36e46bafa9f3	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.