CVE-2020-29481

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 73% 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
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

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

An issue was discovered in Xen through 4.14.x. Access rights of Xenstore nodes are per domid. Unfortunately, existing granted access rights are not removed when a domain is being destroyed. This means that a new domain created with the same domid will inherit the access rights to Xenstore nodes from the previous domain(s) with the same domid. Because all Xenstore entries of a guest below /local/domain/ are being deleted by Xen tools when a guest is destroyed, only Xenstore entries of other guests still running are affected. For example, a newly created guest domain might be able to read sensitive information that had belonged to a previously existing guest domain. Both Xenstore implementations (C and Ocaml) are vulnerable.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

December 15, 2020

Last Modified

November 21, 2024

Advisory Details (5)

Auto-updated Aug 11, 2026
No patch confirmed yet.
generic

XSA-322 - Xen Security Advisories

https://xenbits.xenproject.org/xsa/advisory-322.html
generic

[SECURITY] [DSA 4812-1] xen security update

https://www.debian.org/security/2020/dsa-4812
generic

[SECURITY] Fedora 33 Update: xen-4.14.0-14.fc33 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/
generic

[SECURITY] Fedora 32 Update: xen-4.13.2-5.fc32 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/
generic

oss-security - Xen Security Advisory 322 v5 (CVE-2020-29481) - Xenstore: new domains inheriting existing node permissions

http://www.openwall.com/lists/oss-security/2020/12/16/3

Affected Packages

(19 across 19 ecosystems)
Alpine:v3.11(1)
PackageVulnerable rangeFixed inDependents
xen—4.13.2-r3—
Alpine:v3.12(1)
PackageVulnerable rangeFixed inDependents
xen—4.13.2-r3—
Alpine:v3.13(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.1-r0—
Alpine:v3.14(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.1-r0—
Alpine:v3.15(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.1-r0—
Alpine:v3.16(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.1-r0—
Alpine:v3.17(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.1-r0—
Alpine:v3.18(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.1-r0—
Alpine:v3.19(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.1-r0—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.1-r0—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.1-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.1-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.1-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.1-r0—
Debian:10(1)
PackageVulnerable rangeFixed inDependents
xen4.11.1+92-g6c33308a8d-2 ... 4.11.4-1 (8 versions)4.11.4+57-g41a822c392-2—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.0+88-g1d1d1f5391-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.0+88-g1d1d1f5391-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.0+88-g1d1d1f5391-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
xen—4.14.0+88-g1d1d1f5391-1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 23× 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 140 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
  4. 2026-09-15 03:06 UTCEPSS rescore
  5. 2026-09-13 16:43 UTCEPSS rescore
  6. 2026-09-12 14:57 UTCEPSS rescore
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  8. 2026-09-08 21:56 UTCEPSS rescore
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  10. 2026-09-06 13:44 UTCEPSS rescore
  11. 2026-09-05 15:24 UTCEPSS rescore
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  14. 2026-09-02 14:08 UTCEPSS rescore
  15. 2026-09-01 03:32 UTCEPSS rescore
  16. 2026-08-31 23:34 UTCOSV refresh
  17. 2026-08-30 19:14 UTCEPSS rescore
  18. 2026-08-30 01:18 UTCEPSS rescore
  19. 2026-08-27 14:21 UTCEPSS rescore
  20. 2026-08-26 14:42 UTCEPSS rescore
  21. 2026-08-25 13:45 UTCEPSS rescore
  22. 2026-08-21 23:45 UTCEPSS rescore
  23. 2026-08-20 22:52 UTCEPSS rescore
  24. 2026-08-19 17:00 UTCEPSS rescore
  25. 2026-08-18 13:44 UTCEPSS rescore
Show 75 more
  1. 2026-08-17 13:43 UTCEPSS rescore
  2. 2026-08-16 14:52 UTCEPSS rescore
  3. 2026-08-16 02:11 UTCEPSS rescore
  4. 2026-08-15 01:26 UTCEPSS rescore
  5. 2026-08-15 00:24 UTCOSV refresh
  6. 2026-08-13 21:57 UTCEPSS rescore
  7. 2026-08-12 13:47 UTCEPSS rescore
  8. 2026-08-09 13:43 UTCEPSS rescore
  9. 2026-08-08 16:33 UTCEPSS rescore
  10. 2026-08-07 16:23 UTCEPSS rescore
  11. 2026-08-06 13:43 UTCEPSS rescore
  12. 2026-08-04 15:06 UTCEPSS rescore
  13. 2026-08-04 10:34 UTCEPSS rescore
  14. 2026-08-02 02:23 UTCEPSS rescore
  15. 2026-08-01 04:12 UTCEPSS rescore
  16. 2026-07-30 16:25 UTCEPSS rescore
  17. 2026-07-30 12:44 UTCOSV refresh
  18. 2026-07-30 01:27 UTCEPSS rescore
  19. 2026-07-28 15:33 UTCEPSS rescore
  20. 2026-07-26 14:51 UTCEPSS rescore
  21. 2026-07-25 14:15 UTCEPSS rescore
  22. 2026-07-24 14:14 UTCEPSS rescore
  23. 2026-07-23 14:15 UTCEPSS rescore
  24. 2026-07-23 14:15 UTCEPSS rescore
  25. 2026-07-23 01:52 UTCEG score recompute
  26. 2026-07-22 22:38 UTCEG score recompute
  27. 2026-07-22 14:05 UTCEPSS rescore
  28. 2026-07-20 17:04 UTCEPSS rescore
  29. 2026-07-20 17:04 UTCEPSS rescore
  30. 2026-07-19 14:28 UTCEPSS rescore
  31. 2026-07-19 14:28 UTCEPSS rescore
  32. 2026-07-19 02:26 UTCEPSS rescore
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  34. 2026-07-16 16:59 UTCEPSS rescore
  35. 2026-07-15 16:55 UTCEPSS rescore
  36. 2026-07-15 16:55 UTCEPSS rescore
  37. 2026-07-15 01:57 UTCEPSS rescore
  38. 2026-07-13 22:27 UTCEPSS rescore
  39. 2026-07-13 22:27 UTCEPSS rescore
  40. 2026-07-13 06:10 UTCEPSS rescore
  41. 2026-07-13 06:10 UTCEPSS rescore
  42. 2026-07-12 21:38 UTCOSV refresh
  43. 2026-07-12 05:44 UTCEPSS rescore
  44. 2026-07-11 08:25 UTCEPSS rescore
  45. 2026-07-11 08:25 UTCEPSS rescore
  46. 2026-07-09 19:07 UTCEPSS rescore
  47. 2026-07-08 15:12 UTCEPSS rescore
  48. 2026-07-07 13:43 UTCEPSS rescore
  49. 2026-07-06 16:25 UTCEPSS rescore
  50. 2026-07-06 16:25 UTCEPSS rescore
  51. 2026-07-06 02:21 UTCEPSS rescore
  52. 2026-07-06 02:21 UTCEPSS rescore
  53. 2026-07-04 06:29 UTCEPSS rescore
  54. 2026-07-04 06:29 UTCEPSS rescore
  55. 2026-06-30 23:20 UTCEPSS rescore
  56. 2026-06-30 23:20 UTCEPSS rescore
  57. 2026-06-28 04:54 UTCEPSS rescore
  58. 2026-06-28 04:54 UTCEPSS rescore
  59. 2026-06-27 03:06 UTCEPSS rescore
  60. 2026-06-27 03:06 UTCEPSS rescore
  61. 2026-06-25 13:48 UTCEPSS rescore
  62. 2026-06-24 14:03 UTCEPSS rescore
  63. 2026-06-24 14:03 UTCEPSS rescore
  64. 2026-06-24 07:29 UTCOSV refresh
  65. 2026-06-23 21:31 UTCEPSS rescore
  66. 2026-06-23 21:31 UTCEPSS rescore
  67. 2026-06-22 14:23 UTCEPSS rescore
  68. 2026-06-22 14:23 UTCEPSS rescore
  69. 2026-06-21 14:54 UTCEPSS rescore
  70. 2026-06-21 14:54 UTCEPSS rescore
  71. 2026-06-21 01:57 UTCEPSS rescore
  72. 2026-06-19 19:24 UTCEPSS rescore
  73. 2026-06-19 19:23 UTCEPSS rescore
  74. 2026-06-18 17:50 UTCEPSS rescore
  75. 2026-06-18 17:50 UTCEPSS rescore

Frequently asked(5)

What is CVE-2020-29481?
CVE-2020-29481 is a high vulnerability published on December 15, 2020. An issue was discovered in Xen through 4.14.x. Access rights of Xenstore nodes are per domid. Unfortunately, existing granted access rights are not removed when a domain is being destroyed. This means that a new domain created with the same domid will inherit the access rights to Xenstore nodes…
When was CVE-2020-29481 disclosed?
CVE-2020-29481 was first published in the National Vulnerability Database on December 15, 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-2020-29481 actively exploited?
CVE-2020-29481 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 71.2% of all scored CVEs.
What is the CVSS score of CVE-2020-29481?
CVE-2020-29481 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2020-29481?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-29481, 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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