CVE-2026-22795

Application crash via unvalidated PKCS#12 attributes

Published Jan 27, 2026 · Updated Jan 27, 2026

Type confusion in OpenSSL PKCS#12 parsing allows local users to crash an application by supplying a malformed PKCS#12 file. The parse_bag function in crypto/pkcs12/p12_kiss.c reads friendlyName and localKeyID ASN1_TYPE union members without first validating their tags. A user or application must process the crafted file; the invalid one-byte pointer reaches the normally unmapped zero page, limiting impact to a process crash without code execution or data disclosure.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in OpenSSL PKCS#12 parsing allows local users to crash an application by supplying a malformed PKCS#12 file. The parse_bag function in crypto/pkcs12/p12_kiss.c reads friendlyName and localKeyID ASN1_TYPE union members without first validating their tags. A user or application must process the crafted file; the invalid one-byte pointer reaches the normally unmapped zero page, limiting impact to a process crash without code execution or data disclosure.

The record

CVE
CVE-2026-22795
Published
Jan 27, 2026
Updated
Jan 27, 2026
Vendor
OpenSSL Project
Product
OpenSSL
Classifications
CWE-754, T1204.002, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.1.1 <1.1.1ze
  2. Affected versionversion=3.0.0 <3.0.19
  3. Affected versionversion=3.3.0 <3.3.6
  4. Affected versionversion=3.4.0 <3.4.4
  5. Affected versionversion=3.5.0 <3.5.5
  6. Affected versionversion=3.6.0 <3.6.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

OpenSSL Project · OpenSSLversion=1.1.1 <1.1.1ze; version=3.0.0 <3.0.19; version=3.3.0 <3.3.6; version=3.4.0 <3.4.4; version=3.5.0 <3.5.5; version=3.6.0 <3.6.1

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1204.002User Execution: Malicious File
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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