A use after free vulnerability exists in curl <v8.1.0 in the way libcurl offers a feature to verify an SSH server's public key using a SHA 256 hash. When this check fails, libcurl would free the memory for the fingerprint before it returns an error message containing the (now freed) hash. This flaw risks inserting sensitive heap-based data into the error message that might be shown to users or otherwise get leaked and revealed.

Related CVEs

CVE-2023-28319

Key Information

GHSA ID

GHSA-6xq7-qqp2-9mmc

Published

May 26, 2023 9:30 PM

Last Modified

April 4, 2024 4:21 AM

CVSS Score

7.5 /10

Primary Ecosystem

Unknown

Primary Package

Unknown

GitHub Reviewed

✗ No

Dataset

Last updated: September 20, 2025 6:29 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.