CVE-2020-10756

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 60% 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
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.5Exploit: None knownExposed: 0

A fix is available — apply it.

An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in the icmp6_send_echoreply() routine while replying to an ICMP echo request, also known as ping. This flaw allows a malicious guest to leak the contents of the host memory, resulting in possible information disclosure. This flaw affects versions of libslirp before 4.3.1.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity65% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

July 9, 2020

Last Modified

November 21, 2024

References (20)

Vendor Advisories for CVE-2020-10756(3)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatcontainer-tools:rhel8-8030020200923153805.2a301c242020-11-04redhat
redhatvirt:rhel-8020020200909224913.4cda2c842020-09-29redhat
redhatvirt-devel:8.2-8020120200820190722.863bb0db2020-09-01redhat

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

(14 across 6 ecosystems)
Debian:11(3)
PackageVulnerable rangeFixed inDependents
libslirp—4.3.1-1—
qemu—1:4.1-2—
slirp4netns—1.0.1-1—
Debian:12(3)
PackageVulnerable rangeFixed inDependents
libslirp—4.3.1-1—
qemu—1:4.1-2—
slirp4netns—1.0.1-1—
Debian:13(3)
PackageVulnerable rangeFixed inDependents
libslirp—4.3.1-1—
qemu—1:4.1-2—
slirp4netns—1.0.1-1—
Debian:14(3)
PackageVulnerable rangeFixed inDependents
libslirp—4.3.1-1—
qemu—1:4.1-2—
slirp4netns—1.0.1-1—
Debian:10(1)
PackageVulnerable rangeFixed inDependents
qemu1:3.1+dfsg-8 ... 1:3.1+dfsg-8~deb10u1 (6 versions)1:3.1+dfsg-8+deb10u6—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
qemu1:2.8+dfsg-6 ... 1:2.8+dfsg-6+deb9u9 (10 versions)1:2.8+dfsg-6+deb9u10—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 25× 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 152 total refreshes for this CVE.

  1. 2026-09-18 19:23 UTCEPSS rescore
  2. 2026-09-17 19:22 UTCEPSS rescore
  3. 2026-09-16 14:04 UTCEPSS rescore
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  7. 2026-09-12 14:56 UTCEPSS rescore
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  9. 2026-09-11 09:32 UTCEPSS rescore
  10. 2026-09-07 15:57 UTCEPSS rescore
  11. 2026-09-07 07:18 UTCOSV refresh
  12. 2026-09-06 13:44 UTCEPSS rescore
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  17. 2026-09-01 03:32 UTCEPSS rescore
  18. 2026-08-30 19:14 UTCEPSS rescore
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  20. 2026-08-28 21:37 UTCEPSS rescore
  21. 2026-08-27 14:21 UTCEPSS rescore
  22. 2026-08-26 14:42 UTCEPSS rescore
  23. 2026-08-25 13:45 UTCEPSS rescore
  24. 2026-08-20 22:51 UTCEPSS rescore
  25. 2026-08-20 17:01 UTCOSV refresh
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  1. 2026-08-19 17:00 UTCEPSS rescore
  2. 2026-08-18 13:44 UTCEPSS rescore
  3. 2026-08-17 13:43 UTCEPSS rescore
  4. 2026-08-16 14:52 UTCEPSS rescore
  5. 2026-08-16 02:11 UTCEPSS rescore
  6. 2026-08-15 01:26 UTCEPSS rescore
  7. 2026-08-13 21:57 UTCEPSS rescore
  8. 2026-08-12 13:47 UTCEPSS rescore
  9. 2026-08-09 13:43 UTCEPSS rescore
  10. 2026-08-08 16:33 UTCEPSS rescore
  11. 2026-08-07 16:23 UTCEPSS rescore
  12. 2026-08-06 13:43 UTCEPSS rescore
  13. 2026-08-05 19:14 UTCEPSS rescore
  14. 2026-08-05 10:41 UTCOSV refresh
  15. 2026-08-04 15:06 UTCEPSS rescore
  16. 2026-08-04 10:34 UTCEPSS rescore
  17. 2026-08-03 10:32 UTCEPSS rescore
  18. 2026-08-02 02:23 UTCEPSS rescore
  19. 2026-08-01 04:12 UTCEPSS rescore
  20. 2026-07-30 16:24 UTCEPSS rescore
  21. 2026-07-30 01:27 UTCEPSS rescore
  22. 2026-07-28 15:32 UTCEPSS rescore
  23. 2026-07-26 14:51 UTCEPSS rescore
  24. 2026-07-25 14:14 UTCEPSS rescore
  25. 2026-07-24 14:14 UTCEPSS rescore
  26. 2026-07-23 14:15 UTCEPSS rescore
  27. 2026-07-23 14:15 UTCEPSS rescore
  28. 2026-07-23 01:48 UTCEG score recompute
  29. 2026-07-22 22:32 UTCEG score recompute
  30. 2026-07-22 14:05 UTCEPSS rescore
  31. 2026-07-21 15:22 UTCEPSS rescore
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  33. 2026-07-20 17:04 UTCEPSS rescore
  34. 2026-07-19 14:28 UTCEPSS rescore
  35. 2026-07-19 14:28 UTCEPSS rescore
  36. 2026-07-19 09:22 UTCOSV refresh
  37. 2026-07-19 02:26 UTCEPSS rescore
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  39. 2026-07-18 10:02 UTCEPSS rescore
  40. 2026-07-16 16:59 UTCEPSS rescore
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  42. 2026-07-15 16:55 UTCEPSS rescore
  43. 2026-07-13 22:27 UTCEPSS rescore
  44. 2026-07-13 06:10 UTCEPSS rescore
  45. 2026-07-13 06:10 UTCEPSS rescore
  46. 2026-07-12 05:44 UTCEPSS rescore
  47. 2026-07-11 08:24 UTCEPSS rescore
  48. 2026-07-09 19:06 UTCEPSS rescore
  49. 2026-07-08 15:11 UTCEPSS rescore
  50. 2026-07-07 13:43 UTCEPSS rescore
  51. 2026-07-06 16:25 UTCEPSS rescore
  52. 2026-07-06 16:25 UTCEPSS rescore
  53. 2026-07-06 02:20 UTCEPSS rescore
  54. 2026-07-05 02:27 UTCEPSS rescore
  55. 2026-07-04 06:28 UTCEPSS rescore
  56. 2026-07-01 15:03 UTCOSV refresh
  57. 2026-07-01 15:03 UTCEPSS rescore
  58. 2026-07-01 15:03 UTCEPSS rescore
  59. 2026-06-30 23:20 UTCEPSS rescore
  60. 2026-06-30 23:20 UTCEPSS rescore
  61. 2026-06-29 14:04 UTCEPSS rescore
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  63. 2026-06-28 14:05 UTCEPSS rescore
  64. 2026-06-28 04:54 UTCEPSS rescore
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  66. 2026-06-27 03:06 UTCEPSS rescore
  67. 2026-06-25 13:47 UTCEPSS rescore
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  69. 2026-06-24 14:03 UTCEPSS rescore
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  71. 2026-06-23 21:31 UTCEPSS rescore
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  73. 2026-06-22 14:23 UTCEPSS rescore
  74. 2026-06-22 14:23 UTCEPSS rescore
  75. 2026-06-21 14:54 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2020-10756?
CVE-2020-10756 is a medium vulnerability published on July 9, 2020. An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in the icmp6sendechoreply() routine while replying to an ICMP echo request, also known as ping. This flaw allows a malicious guest to leak the contents of the host memory,…
When was CVE-2020-10756 disclosed?
CVE-2020-10756 was first published in the National Vulnerability Database on July 9, 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-2020-10756 actively exploited?
CVE-2020-10756 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 57.5% of all scored CVEs.
What is the CVSS score of CVE-2020-10756?
CVE-2020-10756 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2020-10756?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-10756, 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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