Issue Summary: The PKCS#12 file processing fails to perform sufficient input validation for files that use Password-Based Message Authentication Code 1 (PBMAC1) integrity mechanism allowing a certificate and private key forgery.
Impact Summary: An attacker impersonating a user can cause a service reading PKCS#12 files to accept forged certificates and private keys with a 1 in 256 probability.
If a service accepting PKCS#12 files is using passwords for authenticating the received files, the attacker can create unencrypted PKCS#12 files that use PBMAC1 authentication that specifies an HMAC key of only one byte, allowing them to craft a file that will be accepted with a 1 in 256 probability. That would then cause the service to accept a certificate and private key controlled by the attacker.
The FIPS modules are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade openssl-libsUpgrade openssl-develUpgrade openssl-perlUpgrade openssl | Jun 16, 2026 | Jun 11, 2026 |
| Alpine Linux | — | Upgrade openssl | Jun 18, 2026 | Jun 9, 2026 |
| Amazon_linux_2023 | — | Upgrade openssl-fips-provider-latestUpgrade openssl-snapsafe-libs-debuginfoUpgrade openssl-debuginfoUpgrade openssl-develUpgrade openssl-fips-provider-latest-debuginfoUpgrade openssl-perlUpgrade openssl-libsUpgrade opensslUpgrade openssl-debugsourceUpgrade openssl-libs-debuginfoUpgrade openssl-snapsafe-libs | Jun 23, 2026 | Jun 9, 2026 |
| Debian | — | Upgrade openssl | Jul 23, 2026 | Jul 23, 2026 |
| Freebsd | — | Upgrade openssl35Upgrade openssl111Upgrade opensslUpgrade openssl36Upgrade FreeBSDUpgrade openssl40Upgrade openssl34 | Jun 15, 2026 | Jun 10, 2026 |
| Http Openssl | — | Upgrade to the latest version of OpenSSL | Jun 10, 2026 | Jun 9, 2026 |
| Oracle Missing Cpu Jul 2026 | — | Apply the July 2026 Critical Patch Update (CPU) for Oracle Database | Jul 22, 2026 | Jun 9, 2026 |
| Redhat_linux | — | Upgrade openssl-perlUpgrade openssl-libsUpgrade openssl-debuginfoUpgrade openssl-develUpgrade openssl-libs-debuginfoUpgrade opensslUpgrade openssl-debugsourceNo solution exists | Jun 17, 2026 | Jun 9, 2026 |
| Rocky_linux | — | Upgrade openssl-debugsourceUpgrade openssl-develUpgrade openssl-libsUpgrade openssl-perlUpgrade opensslUpgrade openssl-debuginfoUpgrade openssl-libs-debuginfo | Jun 17, 2026 | Jun 13, 2026 |
| Ubuntu | — | Upgrade opensslUpgrade libssl3t64Upgrade libssl3 | Jun 16, 2026 | Jun 9, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jun 18, 2026 | Jun 9, 2026 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub