CVE-2021-47052

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2024-02-28. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

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

In the Linux kernel, the following vulnerability has been resolved:

crypto: sa2ul - Fix memory leak of rxd

There are two error return paths that are not freeing rxd and causing memory leaks. Fix these.

Addresses-Coverity: ("Resource leak")

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

February 28, 2024

Last Modified

December 9, 2024

References (8)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 44× 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 107 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-47052?
CVE-2021-47052 is a medium vulnerability published on February 28, 2024. In the Linux kernel, the following vulnerability has been resolved: crypto: sa2ul - Fix memory leak of rxd There are two error return paths that are not freeing rxd and causing memory leaks. Fix these. Addresses-Coverity: ("Resource leak")
When was CVE-2021-47052 disclosed?
CVE-2021-47052 was first published in the National Vulnerability Database on February 28, 2024, with the most recent update on December 9, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47052 actively exploited?
CVE-2021-47052 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 85.3% of all scored CVEs.
What is the CVSS score of CVE-2021-47052?
CVE-2021-47052 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2021-47052?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47052, 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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