CVE-2020-11742

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.4% (32nd percentile of EPSS-scored CVEs). 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
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of bad continuation handling in GNTTABOP_copy. Grant table operations are expected to return 0 for success, and a negative number for errors. The fix for CVE-2017-12135 introduced a path through grant copy handling where success may be returned to the caller without any action taken. In particular, the status fields of individual operations are left uninitialised, and may result in errant behaviour in the caller of GNTTABOP_copy. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to copy a grant, it hits the incorrect exit path. This returns success to the caller without doing anything, which may cause crashes or other incorrect behaviour.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100CISA SSVC

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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
32nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

April 14, 2020

Last Modified

November 21, 2024

References (18)

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuxen-system-armhf (4.11.3+24-g14b62ab3e5-1ubuntu2.3) @ focal2026-05-27ubuntu

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

(22 across 22 ecosystems)
Alpine:v3.10(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.12.2-r1: fixed in 4.12.2-r1
—
Alpine:v3.11(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.13.0-r1: fixed in 4.13.0-r1
—
Alpine:v3.12(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.13.0-r3: fixed in 4.13.0-r3
—
Alpine:v3.13(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.13.0-r3: fixed in 4.13.0-r3
—
Alpine:v3.14(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.13.0-r3: fixed in 4.13.0-r3
—
Alpine:v3.15(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.13.0-r3: fixed in 4.13.0-r3
—
Alpine:v3.16(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.13.0-r3: fixed in 4.13.0-r3
—
Alpine:v3.17(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.13.0-r3: fixed in 4.13.0-r3
—
Alpine:v3.18(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.13.0-r3: fixed in 4.13.0-r3
—
Alpine:v3.19(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.13.0-r3: fixed in 4.13.0-r3
—
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.13.0-r3: fixed in 4.13.0-r3
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.13.0-r3: fixed in 4.13.0-r3
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.13.0-r3: fixed in 4.13.0-r3
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.13.0-r3: fixed in 4.13.0-r3
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.13.0-r3: fixed in 4.13.0-r3
—
Alpine:v3.8(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.10.4-r3: fixed in 4.10.4-r3
—
Alpine:v3.9(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.11.3-r2: fixed in 4.11.3-r2
—
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
xen4.11.1+92-g6c33308a8d-2, 4.11.3+24-g14b62ab3e5-1, 4.11.3+24-g14b62ab3e5-1~deb10u1, 4.11.4-1
  • every version up to 4.11.4+24-gddaaccbbab-1~deb10u1: fixed in 4.11.4+24-gddaaccbbab-1~deb10u1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.11.4-1: fixed in 4.11.4-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.11.4-1: fixed in 4.11.4-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.11.4-1: fixed in 4.11.4-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.11.4-1: fixed in 4.11.4-1
—

All Vendor Advisories

(1)

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 5× in last 7d / 26× 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 168 total refreshes for this CVE.

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

Related CVEs(same product + same vendor)

Frequently asked(5)

What is CVE-2020-11742?
CVE-2020-11742 is a medium vulnerability published on April 14, 2020. An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of bad continuation handling in GNTTABOPcopy. Grant table operations are expected to return 0 for success, and a negative number for errors. The fix for CVE-2017-12135 introduced a path…
When was CVE-2020-11742 disclosed?
CVE-2020-11742 was first published on April 14, 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-2020-11742 actively exploited?
CVE-2020-11742 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-11742?
CVE-2020-11742 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2020-11742?
A fix for CVE-2020-11742 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-11742

Explore →

Is Your Infrastructure Affected by CVE-2020-11742?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs