Is CVE-2022-2509 in the CISA KEV catalog?

No. CVE-2022-2509 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-2509?

CVE-2022-2509 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2022-2509?

CVE-2022-2509 has an EPSS score of 1.48% (71th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-2509?

Upgrade gnutls28 on debian 11 to 3.7.1-5+deb11u2 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2022-2509

HIGHEPSS 71th pctl

7.5

CVSS v3

NVD

Description

A vulnerability found in gnutls. This security flaw happens because of a double free error occurs during verification of pkcs7 signatures in gnutls_pkcs7_verify function.

CWE-415

How to fix

Remediation Available

gnutls28Debian

Fixed in:3.7.1-5+deb11u2CVE-2022-2509

Fixed in:3.7.7-1CVE-2022-2509

gnutls28Ubuntu

Fixed in:3.5.18-1ubuntu1.6USN-5550-1

Fixed in:3.6.13-2ubuntu1.7USN-5550-1

Fixed in:3.7.3-4ubuntu1.1USN-5550-1

libgnutls30Ubuntu

Fixed in:3.5.18-1ubuntu1.6USN-5550-1

Fixed in:3.6.13-2ubuntu1.7USN-5550-1

Fixed in:3.7.3-4ubuntu1.1USN-5550-1

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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.48%probability of exploitation in 30 days

71stpercentile

Elevated risk: more likely to be exploited than 71% of all known CVEs.

References

Vendor Advisory1

lists.gnupg.org

Third-Party Advisory3

Other references1

lists.fedoraproject.org

Related Vulnerabilities

Other CWE-415 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-25136	Medium	6.5	90%	-	Fix
CVE-2018-0101	Critical	10.0	87%	-	Fix
CVE-2003-0545	Critical	9.8	85%	-	Fix
CVE-2019-3829	Medium	5.3	59%	-	Fix
CVE-2026-33824	Critical	9.8	56%	-	Fix
CVE-2021-3407	Medium	5.5	50%	-	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 2025-12-02.