CVE-2026-53020

HIGHPre-NVD 7.87.8
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
7.8
EG Score
7.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
0.7%
KEV
Not listed

Published

June 24, 2026

Last Modified

July 15, 2026

Advisory Details (2)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

um: Fix potential race condition in TLB sync - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f21c343ec7419377bff89ab11146c03ae117036f
generic

um: Fix potential race condition in TLB sync - kernel/git/stable/linux.git - Linux kernel stable tree

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

Vendor Advisories for CVE-2026-53020(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 71× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-24 14:18 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 03:19 UTCEG score recompute
  4. 2026-07-22 14:08 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 14:31 UTCEPSS rescore
  8. 2026-07-19 02:29 UTCEPSS rescore
  9. 2026-07-18 10:04 UTCEPSS rescore
  10. 2026-07-16 22:42 UTCGHSA enrichment
  11. 2026-07-16 17:03 UTCEPSS rescore
  12. 2026-07-16 11:09 UTCGHSA enrichment
  13. 2026-07-15 23:33 UTCGHSA enrichment
  14. 2026-07-15 16:57 UTCEPSS rescore
  15. 2026-07-15 16:57 UTCEPSS rescore
  16. 2026-07-15 12:00 UTCGHSA enrichment
  17. 2026-07-14 23:41 UTCGHSA enrichment
  18. 2026-07-14 11:49 UTCGHSA enrichment
  19. 2026-07-14 00:14 UTCGHSA enrichment
  20. 2026-07-13 22:31 UTCEPSS rescore
  21. 2026-07-13 12:40 UTCGHSA enrichment
  22. 2026-07-13 01:07 UTCGHSA enrichment
  23. 2026-07-12 13:34 UTCGHSA enrichment
  24. 2026-07-12 05:46 UTCEPSS rescore
  25. 2026-07-12 01:57 UTCGHSA enrichment
Show 49 more
  1. 2026-07-11 14:24 UTCGHSA enrichment
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-11 02:23 UTCGHSA enrichment
  5. 2026-07-10 14:47 UTCGHSA enrichment
  6. 2026-07-10 03:14 UTCGHSA enrichment
  7. 2026-07-09 19:10 UTCEPSS rescore
  8. 2026-07-09 19:10 UTCEPSS rescore
  9. 2026-07-09 15:40 UTCGHSA enrichment
  10. 2026-07-09 04:07 UTCGHSA enrichment
  11. 2026-07-08 16:30 UTCGHSA enrichment
  12. 2026-07-08 15:16 UTCEPSS rescore
  13. 2026-07-08 15:16 UTCEPSS rescore
  14. 2026-07-08 04:57 UTCGHSA enrichment
  15. 2026-07-07 16:54 UTCGHSA enrichment
  16. 2026-07-07 13:46 UTCEPSS rescore
  17. 2026-07-07 13:46 UTCEPSS rescore
  18. 2026-07-07 04:00 UTCGHSA enrichment
  19. 2026-07-06 16:27 UTCEPSS rescore
  20. 2026-07-06 16:27 UTCEPSS rescore
  21. 2026-07-06 16:07 UTCGHSA enrichment
  22. 2026-07-06 04:30 UTCGHSA enrichment
  23. 2026-07-05 16:53 UTCGHSA enrichment
  24. 2026-07-05 05:16 UTCGHSA enrichment
  25. 2026-07-05 02:31 UTCEPSS rescore
  26. 2026-07-05 02:30 UTCEPSS rescore
  27. 2026-07-04 17:30 UTCGHSA enrichment
  28. 2026-07-04 06:31 UTCEPSS rescore
  29. 2026-07-04 05:57 UTCGHSA enrichment
  30. 2026-07-03 18:18 UTCGHSA enrichment
  31. 2026-07-03 06:44 UTCGHSA enrichment
  32. 2026-07-02 19:10 UTCGHSA enrichment
  33. 2026-07-02 07:37 UTCGHSA enrichment
  34. 2026-07-01 20:04 UTCGHSA enrichment
  35. 2026-07-01 15:07 UTCEPSS rescore
  36. 2026-07-01 08:31 UTCEG score recompute 7.80
  37. 2026-07-01 08:31 UTCGHSA enrichment
  38. 2026-06-30 23:22 UTCEPSS rescore
  39. 2026-06-29 14:06 UTCEPSS rescore
  40. 2026-06-29 14:06 UTCEPSS rescore
  41. 2026-06-28 14:07 UTCEPSS rescore
  42. 2026-06-28 07:52 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  43. 2026-06-28 04:56 UTCEPSS rescore
  44. 2026-06-28 04:56 UTCEPSS rescore
  45. 2026-06-28 01:26 UTCGHSA enrichment
  46. 2026-06-27 03:08 UTCEPSS rescore
  47. 2026-06-25 13:49 UTCEPSS rescore
  48. 2026-06-24 18:21 UTCEG score recompute
  49. 2026-06-24 18:02 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-53020?
CVE-2026-53020 is a high vulnerability published on June 24, 2026. 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,…
When was CVE-2026-53020 disclosed?
CVE-2026-53020 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53020 actively exploited?
CVE-2026-53020 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53020?
CVE-2026-53020 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-53020?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53020, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-53020

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