CVE-2020-14315

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 2.6%, top 17% 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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 9.8Exploit: None knownExposed: 0

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

A memory corruption vulnerability is present in bspatch as shipped in Colin Percival’s bsdiff tools version 4.3. Insufficient checks when handling external inputs allows an attacker to bypass the sanity checks in place and write out of a dynamically allocated buffer boundaries.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: 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
Severity98% × 45%
Exploitation3% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
3%
EPSS %ILE
84%
KEV
Not listed

Published

September 16, 2020

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Aug 15, 2026
🔬 Proof of concept available. No patch confirmed yet. Sources: redhat.
generic🟡 PoC Available

Advisory X41-2020-006: Memory Corruption Vulnerability in bspatch | X41 D-Sec - Penetration Tests and Source Code Audits

https://www.x41-dsec.de/lab/advisories/x41-2020-006-bspatch/
generic🟡 PoC Available

oss-security - X41 D-Sec GmbH Security Advisory X41-2020-006: Memory Corruption Vulnerability in bspatch

https://www.openwall.com/lists/oss-security/2020/07/09/2
redhat

1856747 – (CVE-2020-14315) CVE-2020-14315 bsdiff: handling external inputs allows attacker to bypass sanity checks

https://bugzilla.redhat.com/show_bug.cgi?id=1856747

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
bsdiff—4.3-22—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
bsdiff—4.3-22—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
bsdiff—4.3-22—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
bsdiff—4.3-22—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 30× 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 127 total refreshes for this CVE.

  1. 2026-08-20 22:51 UTCEPSS rescore
  2. 2026-08-19 17:00 UTCEPSS rescore
  3. 2026-08-18 13:44 UTCEPSS rescore
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  20. 2026-07-30 18:21 UTCOSV refresh
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  1. 2026-07-24 14:14 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
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  4. 2026-07-23 01:49 UTCEG score recompute
  5. 2026-07-22 22:34 UTCEG score recompute
  6. 2026-07-22 14:05 UTCEPSS rescore
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  9. 2026-07-20 17:04 UTCEPSS rescore
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  21. 2026-07-13 03:08 UTCOSV refresh
  22. 2026-07-12 05:44 UTCEPSS rescore
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  24. 2026-07-09 19:06 UTCEPSS rescore
  25. 2026-07-08 15:11 UTCEPSS rescore
  26. 2026-07-07 13:43 UTCEPSS rescore
  27. 2026-07-06 16:25 UTCEPSS rescore
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  46. 2026-06-24 12:48 UTCOSV refresh
  47. 2026-06-23 21:31 UTCEPSS rescore
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  49. 2026-06-22 14:23 UTCEPSS rescore
  50. 2026-06-22 14:23 UTCEPSS rescore
  51. 2026-06-21 14:54 UTCEPSS rescore
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  53. 2026-06-21 01:57 UTCEPSS rescore
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  55. 2026-06-19 19:23 UTCEPSS rescore
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  57. 2026-06-18 17:50 UTCEPSS rescore
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  63. 2026-06-15 17:46 UTCEPSS rescore
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  69. 2026-06-11 13:58 UTCEPSS rescore
  70. 2026-06-10 22:16 UTCEPSS rescore
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  72. 2026-06-10 13:20 UTCEPSS rescore
  73. 2026-06-08 14:15 UTCEPSS rescore
  74. 2026-06-08 14:15 UTCEPSS rescore
  75. 2026-06-07 17:16 UTCOSV refresh

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2020-14315?
CVE-2020-14315 is a critical vulnerability published on September 16, 2020. A memory corruption vulnerability is present in bspatch as shipped in Colin Percival’s bsdiff tools version 4.3. Insufficient checks when handling external inputs allows an attacker to bypass the sanity checks in place and write out of a dynamically allocated buffer boundaries.
When was CVE-2020-14315 disclosed?
CVE-2020-14315 was first published in the National Vulnerability Database on September 16, 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-2020-14315 actively exploited?
CVE-2020-14315 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 16.2% of all scored CVEs.
What is the CVSS score of CVE-2020-14315?
CVE-2020-14315 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-14315?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-14315, 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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