CVE-2021-39793

CRITICALNVD 7.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-04-11), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 1%CVSS: 7.8Exploit: cisa kev · ssvc activeExposed: 0

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

In kbase_jd_user_buf_pin_pages of mali_kbase_mem.c, there is a possible out of bounds write due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-210470189References: N/A

CVSS v3
7.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
50%
KEV
⚠ Exploited

Published

March 16, 2022

Last Modified

October 23, 2025

Advisory Details (2)

Auto-updated Jun 4, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39793
generic

Pixel Update Bulletin—March 2022  |  Android Open Source Project

https://source.android.com/security/bulletin/pixel/2022-03-01

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 60× in last 7d / 245× 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 940 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2021-39793?
CVE-2021-39793 is a critical vulnerability published on March 16, 2022. In kbasejduserbufpinpages of malikbase_mem.c, there is a possible out of bounds write due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android…
When was CVE-2021-39793 disclosed?
CVE-2021-39793 was first published in the National Vulnerability Database on March 16, 2022, with the most recent update on October 23, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-39793 actively exploited?
Yes. CISA added CVE-2021-39793 to the Known Exploited Vulnerabilities catalog on April 11, 2022, affecting Google Pixel. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-39793?
CVE-2021-39793 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2021-39793?
CVE-2021-39793 affects Google Pixel. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2021-39793?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-39793, 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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