Is CVE-2021-47347 in the CISA KEV catalog?

No. CVE-2021-47347 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-47347?

CVE-2021-47347 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2021-47347?

CVE-2021-47347 has an EPSS score of 1.27% (66th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-47347?

Upgrade linux on debian 11 to 5.10.70-1 or later.

CVE & CISA-KEV Catalog

CVE-2021-47347

HIGH

8.8

CVSS v3

NVD

Description

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.

CWE-120Classic Buffer Overflow

How to fix

Remediation Available

linuxDebian

Fixed in:5.10.70-1CVE-2021-47347

Fixed in:5.14.6-1CVE-2021-47347

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.27%probability of exploitation in 30 days

66thpercentile

Moderate risk: more likely to be exploited than 66% of all known CVEs.

References

Patch9

Related Vulnerabilities

Other CWE-120 (Classic Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0195	Medium	6.8	100%	-	Fix
CVE-2017-7269	Critical	9.8	100%	KEV	-
CVE-2019-11043	High	8.7	99%	KEV + Ransom	Fix
CVE-2011-4862	High	10.0	95%	-	Fix
CVE-2007-5659	High	7.8	94%	KEV	Fix
CVE-2022-3786	High	7.5	91%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-04-02.