CVE-2026-22795

MEDIUM EPSS 4.0%
Published Jan 27, 20265mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jan 27, 2026 5mo ago
Last Modified Jun 17, 2026 2w ago

Description

Issue 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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-754

Affected Products 6

VendorProductVersionRange
opensslopenssl*≥1.1.1  –  <1.1.1ze
opensslopenssl*≥3.0.0  –  <3.0.19
opensslopenssl*≥3.3.0  –  <3.3.6
opensslopenssl*≥3.4.0  –  <3.4.4
opensslopenssl*≥3.5.0  –  <3.5.5
opensslopenssl*≥3.6.0  –  <3.6.1

References 7

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-265688.html
  • github.com https://github.com/openssl/openssl/commit/2502e7b7d4c0cf4f972a881641fe09edc67aeec4
    Patch
  • github.com https://github.com/openssl/openssl/commit/572844beca95068394c916626a6d3a490f831a49
    Patch
  • github.com https://github.com/openssl/openssl/commit/7bbca05be55b129651d9df4bdb92becc45002c12
    Patch
  • github.com https://github.com/openssl/openssl/commit/eeee3cbd4d682095ed431052f00403004596373e
    Patch
  • github.com https://github.com/openssl/openssl/commit/ef2fb66ec571564d64d1c74a12e388a2a54d05d2
    Patch
  • openssl-library.org https://openssl-library.org/news/secadv/20260127.txt
    Vendor Advisory

Remediation

  • github.com https://github.com/openssl/openssl/commit/2502e7b7d4c0cf4f972a881641fe09edc67aeec4
    Patch
  • github.com https://github.com/openssl/openssl/commit/572844beca95068394c916626a6d3a490f831a49
    Patch
  • github.com https://github.com/openssl/openssl/commit/7bbca05be55b129651d9df4bdb92becc45002c12
    Patch
  • github.com https://github.com/openssl/openssl/commit/eeee3cbd4d682095ed431052f00403004596373e
    Patch
  • github.com https://github.com/openssl/openssl/commit/ef2fb66ec571564d64d1c74a12e388a2a54d05d2
    Patch