CVE-2026-22795
Missing ASN1_TYPE validation in PKCS#12 parsing
At a glance
- Severity
- MEDIUM 5.5
- EPSS
- EPSS 0.18 % · percentile 7 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- openssl
- NVD status
- Modified
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.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | CISA-ADP |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
Weaknesses (CWE)
European references
- ENISA EUVD · EUVD-2026-4815
- GCVE · GCVE-0-2026-22795
CERT-FR advisories
- CERTFR-2026-AVI-1351 — Multiples vulnérabilités dans Oracle MySQL · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0962 — Multiples vulnérabilités dans les produits Tenable · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0958 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0905 — Multiples vulnérabilités dans Tenable Security Center · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0810 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0796 — Multiples vulnérabilités dans Tenable Identity Exposure · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0627 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0483 — Multiples vulnérabilités dans Stormshield Management Center · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0470 — Multiples vulnérabilités dans Oracle PeopleSoft · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0469 — Multiples vulnérabilités dans Oracle MySQL · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0326 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0318 — Multiples vulnérabilités dans Splunk Universal Forwarder · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0316 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0315 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0281 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0218 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0209 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0199 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0115 — Multiples vulnérabilités dans Tenable Identity Exposure · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0103 — Multiples vulnérabilités dans Node.js · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0096 — Multiples vulnérabilités dans OpenSSL · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 1.1.1 < 1.1.1zecpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 3.0.0 < 3.0.19cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 3.3.0 < 3.3.6cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 3.4.0 < 3.4.4cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 3.5.0 < 3.5.5cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 3.6.0 < 3.6.1
Affected products
| Product | Versions |
|---|---|
| OpenSSL · OpenSSL | affected 3.6.0 < 3.6.1 ; affected 3.5.0 < 3.5.5 ; affected 3.4.0 < 3.4.4 ; affected 3.3.0 < 3.3.6 ; affected 3.0.0 < 3.0.19 ; affected 1.1.1 < 1.1.1ze |
References
- https://openssl-library.org/news/secadv/20260127.txt
- https://github.com/openssl/openssl/commit/ef2fb66ec571564d64d1c74a12e388a2a54d05d2
- https://github.com/openssl/openssl/commit/2502e7b7d4c0cf4f972a881641fe09edc67aeec4
- https://github.com/openssl/openssl/commit/7bbca05be55b129651d9df4bdb92becc45002c12
- https://github.com/openssl/openssl/commit/eeee3cbd4d682095ed431052f00403004596373e
- https://github.com/openssl/openssl/commit/572844beca95068394c916626a6d3a490f831a49
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |