Missing ASN1_TYPE validation in OpenSSL PKCS#12 parsing
CVE-2026-22795 is a type confusion vulnerability in OpenSSL's PKCS#12 parsing code. When processing a malformed PKCS#12 file, the code accesses an ASN1_TYPE union member without first validating that the ASN.1 object is of the expected type. This missing ASN1_TYPE validation can cause an invalid or NULL pointer dereference on memory read. The issue is described as an invalid pointer read constrained to a 1-byte address space (0x00-0xFF), corresponding to the zero page on most modern operating systems, which makes the outcome a reliable crash rather than controlled code execution. Affected versions are OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, and 1.1.1; OpenSSL 1.0.2 is not affected. The OpenSSL FIPS modules in 3.5, 3.4, 3.3, and 3.0 are not affected because the PKCS#12 implementation is outside the FIPS module boundary.
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Impact, mitigation & remediation
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Impact
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Mitigation
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Remediation
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Exploits
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No public exploit code observed for this vulnerability.
Affected products & vendors
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
38 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An OpenSSL vulnerability patched by upgrading to OpenSSL 3.6.1 in IPFire Core Update 200.
Unknown (listed among related OpenSSL CVEs, but not described in the content).
Unknown
Low-severity OpenSSL type confusion issue in PKCS#12 handling, triggered by crafted PKCS#12 inputs (likely DoS; impact depends on usage context).
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.