CVE-2020-12657

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.7%, top 50% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

An issue was discovered in the Linux kernel before 5.6.5. There is a use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body.

CVSS v3
7.8
EG Score
7.8(medium)
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%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
51%
KEV
Not listed

Published

May 5, 2020

Last Modified

November 21, 2024

References (20)

Patch Availability(9)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-virtual (5.3.0.53.45) @ eoan2026-05-27ubuntu
ubuntulinux-image-virtual-hwe-20.04 (5.4.0.31.36) @ focal2026-05-27ubuntu
ubuntulinux-image-oem-osp1 (5.0.0.1052.55) @ bionic2026-05-27ubuntu
ubuntulinux-image-virtual-hwe-16.04-edge (4.15.0.101.108) @ xenial2026-05-27ubuntu
redhatkpatch-patch2020-06-23redhat
redhatkernel-0:4.18.0-147.20.1.el8_12020-06-23redhat
redhatkernel-0:4.18.0-80.23.2.el8_02020-06-09redhat
redhatkernel-rt-0:4.18.0-193.6.3.rt13.59.el8_22020-06-09redhat
redhatkernel-0:4.18.0-193.6.3.el8_22020-06-09redhat

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux—5.6.7-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—5.6.7-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—5.6.7-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—5.6.7-1—

Weakness Classification(1)

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

All Vendor Advisories

(11)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 8× in last 7d / 31× 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.

Showing the most recent 100 of 130 total refreshes for this CVE.

  1. 2026-08-20 22:51 UTCEPSS rescore
  2. 2026-08-20 22:45 UTCOSV refresh
  3. 2026-08-19 17:00 UTCEPSS rescore
  4. 2026-08-18 13:44 UTCEPSS rescore
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  15. 2026-08-05 19:14 UTCEPSS rescore
  16. 2026-08-05 14:11 UTCOSV refresh
  17. 2026-08-04 15:06 UTCEPSS rescore
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  24. 2026-07-28 15:32 UTCEPSS rescore
  25. 2026-07-26 14:51 UTCEPSS rescore
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  1. 2026-07-25 14:14 UTCEPSS rescore
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  3. 2026-07-23 14:15 UTCEPSS rescore
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  5. 2026-07-23 01:49 UTCEG score recompute
  6. 2026-07-22 22:33 UTCEG score recompute
  7. 2026-07-22 14:05 UTCEPSS rescore
  8. 2026-07-21 15:22 UTCEPSS rescore
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  10. 2026-07-20 17:04 UTCEPSS rescore
  11. 2026-07-19 14:28 UTCEPSS rescore
  12. 2026-07-19 14:28 UTCEPSS rescore
  13. 2026-07-19 13:24 UTCOSV refresh
  14. 2026-07-19 02:26 UTCEPSS rescore
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  16. 2026-07-18 10:02 UTCEPSS rescore
  17. 2026-07-16 16:59 UTCEPSS rescore
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  19. 2026-07-15 16:55 UTCEPSS rescore
  20. 2026-07-13 22:27 UTCEPSS rescore
  21. 2026-07-13 06:10 UTCEPSS rescore
  22. 2026-07-13 06:10 UTCEPSS rescore
  23. 2026-07-12 05:44 UTCEPSS rescore
  24. 2026-07-11 08:24 UTCEPSS rescore
  25. 2026-07-09 19:06 UTCEPSS rescore
  26. 2026-07-08 15:11 UTCEPSS rescore
  27. 2026-07-07 13:43 UTCEPSS rescore
  28. 2026-07-06 16:25 UTCEPSS rescore
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  30. 2026-07-06 02:20 UTCEPSS rescore
  31. 2026-07-05 02:27 UTCEPSS rescore
  32. 2026-07-04 06:28 UTCEPSS rescore
  33. 2026-07-01 22:31 UTCOSV refresh
  34. 2026-07-01 15:03 UTCEPSS rescore
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  36. 2026-06-30 23:20 UTCEPSS rescore
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  40. 2026-06-28 14:05 UTCEPSS rescore
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  43. 2026-06-27 03:06 UTCEPSS rescore
  44. 2026-06-25 13:47 UTCEPSS rescore
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  46. 2026-06-24 14:03 UTCEPSS rescore
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  48. 2026-06-23 21:31 UTCEPSS rescore
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  50. 2026-06-22 14:23 UTCEPSS rescore
  51. 2026-06-22 14:23 UTCEPSS rescore
  52. 2026-06-21 14:54 UTCEPSS rescore
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  54. 2026-06-21 01:57 UTCEPSS rescore
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  56. 2026-06-19 19:23 UTCEPSS rescore
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  58. 2026-06-18 17:50 UTCEPSS rescore
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  64. 2026-06-15 17:46 UTCEPSS rescore
  65. 2026-06-14 23:15 UTCEPSS rescore
  66. 2026-06-14 23:15 UTCEPSS rescore
  67. 2026-06-14 03:13 UTCOSV refresh
  68. 2026-06-13 22:58 UTCEPSS rescore
  69. 2026-06-13 22:58 UTCEPSS rescore
  70. 2026-06-12 23:09 UTCEPSS rescore
  71. 2026-06-11 13:58 UTCEPSS rescore
  72. 2026-06-10 22:16 UTCEPSS rescore
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  74. 2026-06-10 13:20 UTCEPSS rescore
  75. 2026-06-08 14:15 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2020-12657?
CVE-2020-12657 is a high vulnerability published on May 5, 2020. An issue was discovered in the Linux kernel before 5.6.5. There is a use-after-free in block/bfq-iosched.c related to bfqidleslicetimerbody.
When was CVE-2020-12657 disclosed?
CVE-2020-12657 was first published in the National Vulnerability Database on May 5, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-12657 actively exploited?
CVE-2020-12657 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.2% of all scored CVEs.
What is the CVSS score of CVE-2020-12657?
CVE-2020-12657 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2020-12657?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-12657, 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

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