CVE-2020-15707

MEDIUMNVD 5.75.7—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.7 under NVD CVSS v3. EPSS exploit probability: 1.6%, top 27% 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
5.7
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 2%CVSS: 5.7Exploit: NoneExposed: 0

A fix is available — apply it.

Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04 and prior versions.

CVSS v3
5.7
EG Score
5.7(medium)
EG Risk
31(Track)
EG Risk 31/100SSVC: 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
Severity57% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
73.1%
KEV
Not listed

Published

July 29, 2020

Last Modified

November 21, 2024

References (34)

Vendor Advisories for CVE-2020-15707(1)

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

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntugrub2-common (2.04-1ubuntu26.1) @ focal2026-05-23ubuntu
redhatshim-signed-0:15-8.el7_62020-08-03redhat
redhatshim-signed-0:15-8.el7_72020-08-03redhat
redhatshim-signed-0:15-8.el7_32020-08-03redhat
redhatshim-signed-0:15-8.el7_42020-08-03redhat
redhatshim-signed-0:15-7.el7_82020-07-29redhat
redhatshim-unsigned-x64-0:15-7.el82020-07-29redhat
redhatshim-0:15-14.el8_02020-07-29redhat

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.

Weakness Classification(2)

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

Additional Vendor Advisories

(9)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 12× in last 7d / 47× 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. 2026-07-23 01:50 UTCEG score recompute
  2. 2026-07-22 22:35 UTCEG score recompute
  3. 2026-07-22 14:05 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
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  19. 2026-07-12 21:07 UTCOSV refresh
  20. 2026-07-12 05:44 UTCEPSS rescore
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  1. 2026-07-07 13:43 UTCEPSS rescore
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  20. 2026-06-24 06:50 UTCOSV refresh
  21. 2026-06-23 21:31 UTCEPSS rescore
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  23. 2026-06-21 14:54 UTCEPSS rescore
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  25. 2026-06-19 19:23 UTCEPSS rescore
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  41. 2026-06-07 15:23 UTCEPSS rescore
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  43. 2026-06-07 10:29 UTCOSV refresh
  44. 2026-06-06 13:45 UTCEPSS rescore
  45. 2026-06-06 13:45 UTCEPSS rescore
  46. 2026-06-05 22:45 UTCEPSS rescore
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  68. 2026-05-24 16:48 UTCEPSS rescore
  69. 2026-05-23 03:46 UTCEG score recompute
  70. 2026-05-23 03:46 UTCVendor advisory
  71. 2026-05-23 03:46 UTCGHSA enrichment

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2020-15707?
CVE-2020-15707 is a medium vulnerability published on July 29, 2020. Integer overflows were discovered in the functions grubcmdinitrd and grubinitrdinit in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely…
When was CVE-2020-15707 disclosed?
CVE-2020-15707 was first published in the National Vulnerability Database on July 29, 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-2020-15707 actively exploited?
CVE-2020-15707 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 73.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-15707?
CVE-2020-15707 has a CVSS v3 base score of 5.7 (NVD).
How do I remediate CVE-2020-15707?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-15707, 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.

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