CVE-2021-47347

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2024-05-21. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, 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: 1%CVSS: 8.8Exploit: 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:

wl1251: Fix possible buffer overflow in wl1251_cmd_scan

Function wl1251_cmd_scan calls memcpy without checking the length. Harden by checking the length is within the maximum allowed size.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
55%
KEV
Not listed

Published

May 21, 2024

Last Modified

August 5, 2026

Advisory Details (9)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

wl1251: Fix possible buffer overflow in wl1251_cmd_scan - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d10a87a3535cce2b890897914f5d0d83df669c63
generic

wl1251: Fix possible buffer overflow in wl1251_cmd_scan - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/40af3960a15339e8bbd3be50c3bc7b35e1a0b6ea
generic

wl1251: Fix possible buffer overflow in wl1251_cmd_scan - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/302e2ee34c5f7c5d805b7f835d9a6f2b43474e2a
generic

wl1251: Fix possible buffer overflow in wl1251_cmd_scan - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c5e4a10d7bd5d4f419d8b9705dff60cf69b302a1
generic

wl1251: Fix possible buffer overflow in wl1251_cmd_scan - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d71dddeb5380613f9ef199f3e7368fd78fb1a46e
generic

wl1251: Fix possible buffer overflow in wl1251_cmd_scan - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/115103f6e3f1c26c473766c16439c7c8b235529a
generic

wl1251: Fix possible buffer overflow in wl1251_cmd_scan - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0f6c0488368c9ac1aa685821916fadba32f5d1ef
generic

wl1251: Fix possible buffer overflow in wl1251_cmd_scan - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d3d8b9c9c7843dce31e284927d4c9904fd5a510a
generic

wl1251: Fix possible buffer overflow in wl1251_cmd_scan - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/57ad99ae3c6738ba87bad259bb57c641ca68ebf6

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.46-4, 5.10.46-5, 5.10.70-1~bpo10+15.10.70-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—5.14.6-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—5.14.6-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—5.14.6-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× 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 164 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-47347?
CVE-2021-47347 is a high vulnerability published on May 21, 2024. In the Linux kernel, the following vulnerability has been resolved: wl1251: Fix possible buffer overflow in wl1251cmdscan Function wl1251cmdscan calls memcpy without checking the length. Harden by checking the length is within the maximum allowed size.
When was CVE-2021-47347 disclosed?
CVE-2021-47347 was first published in the National Vulnerability Database on May 21, 2024, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47347 actively exploited?
CVE-2021-47347 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 44.9% of all scored CVEs.
What is the CVSS score of CVE-2021-47347?
CVE-2021-47347 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2021-47347?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47347, 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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