CVE-2022-42332

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2023-03-21. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

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

x86 shadow plus log-dirty mode use-after-free In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Shadow mode maintains a pool of memory used for both shadow page tables as well as auxiliary data structures. To migrate or snapshot guests, Xen additionally runs them in so called log-dirty mode. The data structures needed by the log-dirty tracking are part of aformentioned auxiliary data. In order to keep error handling efforts within reasonable bounds, for operations which may require memory allocations shadow mode logic ensures up front that enough memory is available for the worst case requirements. Unfortunately, while page table memory is properly accounted for on the code path requiring the potential establishing of new shadows, demands by the log-dirty infrastructure were not taken into consideration. As a result, just established shadow page tables could be freed again immediately, while other code is still accessing them on the assumption that they would remain allocated.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

March 21, 2023

Last Modified

November 21, 2024

References (14)

Affected Packages

(14 across 14 ecosystems)
Alpine:v3.15(1)
PackageVulnerable rangeFixed inDependents
xen—4.15.5-r0—
Alpine:v3.16(1)
PackageVulnerable rangeFixed inDependents
xen—4.16.4-r0—
Alpine:v3.17(1)
PackageVulnerable rangeFixed inDependents
xen—4.16.4-r0—
Alpine:v3.18(1)
PackageVulnerable rangeFixed inDependents
xen—4.17.0-r5—
Alpine:v3.19(1)
PackageVulnerable rangeFixed inDependents
xen—4.17.0-r5—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
xen—4.17.0-r5—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
xen—4.17.0-r5—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
xen—4.17.0-r5—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
xen—4.17.0-r5—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
xen—4.17.0-r5—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
xen4.14.2+25-gb6a8c4f72d-2 ... 4.14.5+86-g1c354767d5-1 (8 versions)4.14.5+94-ge49571868d-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
xen—4.17.0+74-g3eac216e6e-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
xen—4.17.0+74-g3eac216e6e-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
xen—4.17.0+74-g3eac216e6e-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 33× 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 149 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2022-42332?
CVE-2022-42332 is a high vulnerability published on March 21, 2023. x86 shadow plus log-dirty mode use-after-free In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Shadow mode maintains a pool of memory used for both shadow page tables as well as…
When was CVE-2022-42332 disclosed?
CVE-2022-42332 was first published in the National Vulnerability Database on March 21, 2023, 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-2022-42332 actively exploited?
CVE-2022-42332 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 81.3% of all scored CVEs.
What is the CVSS score of CVE-2022-42332?
CVE-2022-42332 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2022-42332?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-42332, 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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