Race condition in GnuTLS - #VU128567
Published: January 17, 2022 / Updated: April 30, 2026
Vulnerability identifier: #VU128567
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
GnuTLS
GnuTLS
Software vendor:
GnuTLS
GnuTLS
Description
The vulnerability allows a remote attacker to cause memory corruption.
The vulnerability exists due to memory corruption in gnutls_x509_trust_list_verify_crt2() when verifying certificates using a shared trust list object across multiple threads. A remote attacker can trigger concurrent certificate verification operations to cause memory corruption.
The vulnerable code path is only reached when a PKCS#11 based trust store is enabled and the issuer certificate is already stored as trusted.
Remediation
Install security update from vendor's website.