CVE-2026-22796

A flaw was found in OpenSSL. This type confusion vulnerability allows a remote attacker to cause a denial of service (DoS) by providing specially crafted PKCS#7 data to an application that performs signature verification. The vulnerability occurs because the application accesses an ASN1_TYPE union member without proper type validation, leading to an invalid or NULL pointer dereference and a crash.

This vulnerability is rated Low for Red Hat products. A type confusion flaw in the legacy PKCS#7 API can lead to a Denial of Service when processing specially crafted PKCS#7 data. Exploitation requires an application to perform signature verification of malformed PKCS#7 data. Red Hat products utilizing the FIPS module are not affected as the PKCS#7 parsing is outside the module boundary.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.