GnuTLS pkcs7 Signature Verification gnutls_pkcs7_verify double free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.4$0-$5k0.00

Summaryinfo

A vulnerability was found in GnuTLS. It has been classified as critical. This issue affects the function gnutls_pkcs7_verify of the component pkcs7 Signature Verification Handler. The manipulation leads to double free. This vulnerability is referenced as CVE-2022-2509. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in GnuTLS (Network Encryption Software) (unknown version) and classified as critical. This issue affects the function gnutls_pkcs7_verify of the component pkcs7 Signature Verification Handler. The manipulation with an unknown input leads to a double free vulnerability. Using CWE to declare the problem leads to CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was published 08/01/2022. The advisory is shared at access.redhat.com. The identification of this vulnerability is CVE-2022-2509 since 07/22/2022. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/02/2025).

The vulnerability scanner Nessus provides a plugin with the ID 236730 (Alibaba Cloud Linux 3 : 0181: gnutls (ALINUX3-SA-2022:0181)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (236730). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 236730
Nessus Name: Alibaba Cloud Linux 3 : 0181: gnutls (ALINUX3-SA-2022:0181)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/22/2022 🔍
08/01/2022 +10 days 🔍
08/01/2022 +0 days 🔍
12/02/2025 +1219 days 🔍

Sourcesinfo

Advisory: DLA 3070-1
Status: Confirmed

CVE: CVE-2022-2509 (🔍)
GCVE (CVE): GCVE-0-2022-2509
GCVE (VulDB): GCVE-100-205385

Entryinfo

Created: 08/01/2022 19:19
Updated: 12/02/2025 22:36
Changes: 08/01/2022 19:19 (38), 08/29/2022 10:00 (1), 05/16/2025 13:43 (16), 12/02/2025 22:36 (12)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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