CVE-2026-53020

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. The CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 4 sources updated this week

Also known asEUVD-2026-38888 (ENISA EUVD) · GHSA-m33q-f5vx-jwmj (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

June 24, 2026

Last Modified

August 5, 2026

Advisory Details (2)

Auto-updated Jun 28, 2026
Patch available.
Web page

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

https://git.kernel.org/stable/c/f21c343ec7419377bff89ab11146c03ae117036f
Web page

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.

Patch Availability(12)

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (141 versions)
  • every version up to 7.0.10-1: fixed in 7.0.10-1
—

Weakness Classification(1)

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

All Vendor Advisories

(11)

Data Freshness Timeline

(refreshed 11× in last 7d / 42× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 306 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 206 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  3. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  4. 2026-10-25 14:20 UTCEG score recompute
  5. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-10-24 15:22 UTCEG score recompute
  7. 2026-10-24 15:22 UTCVendor advisory
  8. 2026-10-24 15:22 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8
  9. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-18 03:32 UTCEG score recompute
  15. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-17 11:17 UTCEG score recompute
  17. 2026-10-17 11:17 UTCVendor advisory
  18. 2026-10-17 11:17 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8
  19. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-10-14 05:24 UTCOSV refresh
  23. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-10-12 15:58 UTCEG score recompute
Show 75 more
  1. 2026-10-11 19:41 UTCEG score recompute
  2. 2026-10-11 16:56 UTCEG score recompute
  3. 2026-10-11 14:19 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-09-23 17:53 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  22. 2026-09-23 11:24 UTCEG score recompute
  23. 2026-09-23 11:24 UTCVendor advisory
  24. 2026-09-23 11:24 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  26. 2026-09-18 07:58 UTCEG score recompute
  27. 2026-09-18 07:58 UTCVendor advisory
  28. 2026-09-18 07:58 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8
  29. 2026-09-16 14:08 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  30. 2026-09-16 05:15 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  31. 2026-09-14 01:49 UTCEG score recompute
  32. 2026-09-14 01:49 UTCVendor advisory
  33. 2026-09-14 01:49 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8
  34. 2026-09-13 16:47 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  35. 2026-09-13 09:54 UTCVendor advisory
  36. 2026-09-13 09:54 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8
  37. 2026-09-12 16:53 UTCEG score recompute
  38. 2026-09-12 16:53 UTCVendor advisory
  39. 2026-09-12 16:53 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8
  40. 2026-09-11 14:53 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  41. 2026-09-10 09:35 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  42. 2026-09-08 22:01 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  43. 2026-09-07 16:01 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  44. 2026-09-06 13:47 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  45. 2026-09-04 05:06 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  46. 2026-09-02 14:12 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  47. 2026-09-01 13:54 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  48. 2026-08-30 20:07 UTCEG score recompute
  49. 2026-08-30 20:07 UTCVendor advisory
  50. 2026-08-30 20:07 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8
  51. 2026-08-30 01:22 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  52. 2026-08-28 21:41 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  53. 2026-08-28 04:45 UTCEG score recompute
  54. 2026-08-28 04:45 UTCVendor advisory
  55. 2026-08-28 04:44 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8
  56. 2026-08-27 14:25 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  57. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  58. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  59. 2026-08-25 01:16 UTCEG score recompute
  60. 2026-08-25 01:16 UTCVendor advisory
  61. 2026-08-25 01:16 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8
  62. 2026-08-24 13:42 UTCEG score recompute
  63. 2026-08-24 13:42 UTCVendor advisory
  64. 2026-08-24 13:42 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8
  65. 2026-08-24 00:04 UTCVendor advisory
  66. 2026-08-24 00:03 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8
  67. 2026-08-23 12:28 UTCVendor advisory
  68. 2026-08-23 12:28 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8
  69. 2026-08-23 00:55 UTCEG score recompute
  70. 2026-08-23 00:55 UTCVendor advisory
  71. 2026-08-23 00:55 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8
  72. 2026-08-23 00:19 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  73. 2026-08-22 13:03 UTCEG score recompute
  74. 2026-08-22 13:03 UTCVendor advisory
  75. 2026-08-22 13:02 UTCGHSA enrichmentGHSA-m33q-f5vx-jwmj · GitHub severity HIGH · GitHub CVSS 7.8

Frequently asked(5)

What is CVE-2026-53020?
CVE-2026-53020 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-53020 published?
The CVE record for CVE-2026-53020 was published on June 24, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 5, 2026; the record at its source may have been updated since.
Is CVE-2026-53020 actively exploited?
CVE-2026-53020 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53020?
CVE-2026-53020 has a CVSS base score of 7.8 (the CNA's own assessment, by linux; NVD's own analysis pending).
How do I remediate CVE-2026-53020?
A fix for CVE-2026-53020 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-53020 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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