All vulnerabilities

Servers and applications

CVE-2021-22901

curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session ticket arrives over a connection. A malicious server can use this in rare unfortunate circumstances to potentially reach remote code execution in the client. When libcurl at run-time sets up support for TLS 1.3 session tickets on a connection using OpenSSL,…

Severity
High 8.1
Published
11 Jun 2021
Last changed
14 Oct 2026
Added to UpHeron
21 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
curlServers and applications · cpe:a:haxx:curl
  • From 7.75.0 up to 7.76.1
MySQLServers and applications · cpe:a:oracle:mysql_server
  • Every version up to 5.7.34
  • From 8.0.0 up to 8.0.25

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-22901
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-22901