ssue summary: An invalid or NULL pointer dereference can happen in an application processing a malformed PKCS#12 file. Impact summary: An application processing a malformed PKCS#12 file can be caused to dereference an invalid or NULL pointer on memory read, resulting in a Denial of Service. A type confusion vulnerability exists in PKCS#12 parsing code where an ASN1_TYPE union member is accessed without first validating the type, causing an invalid pointer read. The location is constrained to a 1-byte address space, meaning any attempted pointer manipulation can only target addresses between 0x00 and 0xFF. This range corresponds to the zero page, which is unmapped on most modern operating systems and will reliably result in a crash, leading only to a Denial of Service. Exploiting this issue also requires a user or application to process a maliciously crafted PKCS#12 file. It is uncommon to accept untrusted PKCS#12 files in applications as they are usually used to store private keys which are trusted by definition. For these reasons, the issue was assessed as Low severity. The FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the PKCS12 implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue. OpenSSL 1.0.2 is not affected by this issue.
Configuration 1 (hide)
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02 Feb 2026, 18:41
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Openssl
Openssl openssl |
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| References | () https://github.com/openssl/openssl/commit/2502e7b7d4c0cf4f972a881641fe09edc67aeec4 - Patch | |
| References | () https://github.com/openssl/openssl/commit/572844beca95068394c916626a6d3a490f831a49 - Patch | |
| References | () https://github.com/openssl/openssl/commit/7bbca05be55b129651d9df4bdb92becc45002c12 - Patch | |
| References | () https://github.com/openssl/openssl/commit/eeee3cbd4d682095ed431052f00403004596373e - Patch | |
| References | () https://github.com/openssl/openssl/commit/ef2fb66ec571564d64d1c74a12e388a2a54d05d2 - Patch | |
| References | () https://openssl-library.org/news/secadv/20260127.txt - Vendor Advisory | |
| CPE | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
29 Jan 2026, 19:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
27 Jan 2026, 16:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Published : 2026-01-27 16:16
Updated : 2026-02-02 18:41
NVD link : CVE-2026-22795
Mitre link : CVE-2026-22795
CVE.ORG link : CVE-2026-22795
JSON object : View
Improper Check for Unusual or Exceptional Conditions