Missing ASN1_TYPE validation in PKCS#12 parsing
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.
- BDU:2026-01214
- ALSA-2026:1472
- ALSA-2026:1473
- DLA-4490-1
- DSA-6113-1
- openSUSE-SU-2026:10237-1
- openSUSE-SU-2026:20152-1
- RHSA-2026:1472
- RHSA-2026:1473
- RHSA-2026:7261
- RLSA-2026:1472
- RLSA-2026:1473
- SUSE-SU-2026:0309-1
- SUSE-SU-2026:0310-1
- SUSE-SU-2026:0311-1
- SUSE-SU-2026:0312-1
- SUSE-SU-2026:0331-1
- SUSE-SU-2026:0343-1
- SUSE-SU-2026:0346-1
- SUSE-SU-2026:0358-1
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Jan 27, 2026
- Updated
- Jun 17, 2026
- EPSS
- 0.2% · 6th percentile
- CWE
- CWE-754
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Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| openssl | openssl | cpe:2.3:a:openssl:openssl |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- openssl openssl1.1.1 and later · before 1.1.1ze
- openssl openssl3.0.0 and later · before 3.0.19
- openssl openssl3.3.0 and later · before 3.3.6
- openssl openssl3.4.0 and later · before 3.4.4
- openssl openssl3.5.0 and later · before 3.5.5
- openssl openssl3.6.0 and later · before 3.6.1
Versions reported by the vendor
Affected version ranges reported by the assigning authority (openssl). Independent of NVD's CPE analysis and usually ahead of it.
OpenSSL OpenSSL
- 3.6.0 and later · before 3.6.1affected · semver
- 3.5.0 and later · before 3.5.5affected · semver
- 3.4.0 and later · before 3.4.4affected · semver
- 3.3.0 and later · before 3.3.6affected · semver
- 3.0.0 and later · before 3.0.19affected · semver
- 1.1.1 and later · before 1.1.1zeaffected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:10 | openssl | before 1:3.5.1-7.el10_1.alma.1 | 1:3.5.1-7.el10_1.alma.1 |
| AlmaLinux:10 | openssl-devel | before 1:3.5.1-7.el10_1.alma.1 | 1:3.5.1-7.el10_1.alma.1 |
| AlmaLinux:10 | openssl-libs | before 1:3.5.1-7.el10_1.alma.1 | 1:3.5.1-7.el10_1.alma.1 |
| AlmaLinux:10 | openssl-perl | before 1:3.5.1-7.el10_1.alma.1 | 1:3.5.1-7.el10_1.alma.1 |
| AlmaLinux:9 | openssl | before 1:3.5.1-7.el9_7 | 1:3.5.1-7.el9_7 |
| AlmaLinux:9 | openssl-devel | before 1:3.5.1-7.el9_7 | 1:3.5.1-7.el9_7 |
| AlmaLinux:9 | openssl-libs | before 1:3.5.1-7.el9_7 | 1:3.5.1-7.el9_7 |
| AlmaLinux:9 | openssl-perl | before 1:3.5.1-7.el9_7 | 1:3.5.1-7.el9_7 |
| Alpine:v3.17 | openssl | from 1.1.1 · before 3.0.19-r0 | 3.0.19-r0 |
| Alpine:v3.20 | openssl | from 1.1.1 · before 3.3.6-r0 | 3.3.6-r0 |
| Alpine:v3.22 | openssl | from 1.1.1 · before 3.5.5-r0 | 3.5.5-r0 |
| Debian:11 | openssl | before 1.1.1w-0+deb11u5 | 1.1.1w-0+deb11u5 |
| Debian:12 | openssl | before 3.0.18-1~deb12u2 | 3.0.18-1~deb12u2 |
| Debian:13 | openssl | before 3.5.4-1~deb13u2 | 3.5.4-1~deb13u2 |
| Debian:14 | openssl | before 3.5.5-1 | 3.5.5-1 |
| openSUSE:Leap 16.0 | openssl-3 | before 3.5.0-160000.5.1 | 3.5.0-160000.5.1 |
| openSUSE:Tumbleweed | openssl-3 | before 3.5.3-2.1 | 3.5.3-2.1 |
| Red Hat:enterprise_linux:10.1 | openssl | before 1:3.5.1-7.el10_1 | 1:3.5.1-7.el10_1 |
| Red Hat:enterprise_linux:10.1 | openssl-debuginfo | before 1:3.5.1-7.el10_1 | 1:3.5.1-7.el10_1 |
| Red Hat:enterprise_linux:10.1 | openssl-debugsource | before 1:3.5.1-7.el10_1 | 1:3.5.1-7.el10_1 |
| Red Hat:enterprise_linux:10.1 | openssl-devel | before 1:3.5.1-7.el10_1 | 1:3.5.1-7.el10_1 |
| Red Hat:enterprise_linux:10.1 | openssl-libs | before 1:3.5.1-7.el10_1 | 1:3.5.1-7.el10_1 |
| Red Hat:enterprise_linux:10.1 | openssl-libs-debuginfo | before 1:3.5.1-7.el10_1 | 1:3.5.1-7.el10_1 |
| Red Hat:enterprise_linux:10.1 | openssl-perl | before 1:3.5.1-7.el10_1 | 1:3.5.1-7.el10_1 |
+25
Same product
openssl: all recordsOther highest-scoring records for the same primary product.
- CVE-2014-0160The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows remKEV90Now
- CVE-2021-3711SM2 Decryption Buffer Overflow65This week
- CVE-2003-0545Double free vulnerability in OpenSSL 0.9.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code 65This week
- CVE-2016-2108The ASN.1 implementation in OpenSSL before 1.0.1o and 1.0.2 before 1.0.2c allows remote attackers to execute arbitrary code or cause a denia62This week
- CVE-2016-6309statem/statem.c in OpenSSL 1.1.0a does not consider memory-block movement after a realloc call, which allows remote attackers to cause a den60This week
- CVE-2022-3786X.509 Email Address Variable Length Buffer Overflow58Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| OpenSSL OpenSSL | 3.0.19 | Vendor (CNA) |
| OpenSSL OpenSSL | 3.3.6 | Vendor (CNA) |
| OpenSSL OpenSSL | 3.4.4 | Vendor (CNA) |
| OpenSSL OpenSSL | 3.5.5 | Vendor (CNA) |
| OpenSSL OpenSSL | 3.6.1 | Vendor (CNA) |
| almalinux:openssl | 1:3.5.1-7.el10_1.alma.1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:openssl-devel | 1:3.5.1-7.el10_1.alma.1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:openssl-libs | 1:3.5.1-7.el10_1.alma.1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:openssl-perl | 1:3.5.1-7.el10_1.alma.1 · AlmaLinux:10 | Package registry (OSV) |
| alpine:openssl | 3.0.19-r0 · Alpine:v3.17 | Package registry (OSV) |
| debian:openssl | 3.0.18-1~deb12u2 · Debian:12 | Package registry (OSV) |
| opensuse:openssl-1_1 | 1.1.1w-150600.5.21.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:openssl-3 | 3.1.4-150600.5.42.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| red hat:openssl | 1:3.5.1-7.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:openssl-debuginfo | 1:3.5.1-7.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:openssl-debugsource | 1:3.5.1-7.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:openssl-devel | 1:3.5.1-7.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:openssl-libs | 1:3.5.1-7.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:openssl-libs-debuginfo | 1:3.5.1-7.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:openssl-perl | 1:3.5.1-7.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| rocky linux:openssl | 1:3.5.1-7.el10_1 · Rocky Linux:10 | Package registry (OSV) |
| suse:openssl-1_1 | 1.1.1w-150600.5.21.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:openssl-1_1 | 1.1.1w-150700.11.11.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
| suse:openssl-3 | 3.1.4-150600.5.42.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:openssl-3 | 3.2.3-150700.5.24.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
- Bob Beckremediation developer
- Luigino Camastra (Aisle Research)reporter
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2025-694200 days apartMissing ASN1_TYPE validation in TS_RESP_verify_response() function30Monitor
- CVE-2026-3179070 days apartIncorrect Failure Handling in RSA KEM RSASVE Encapsulation30Monitor
- CVE-2026-227960 days apartASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes() function21Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-754 · Improper Check for Unusual or Exceptional ConditionsCVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- github.com/openssl/openssl/commit/2502e7b7d4c0cf4f972a881641fe09edc67aeec4
- github.com/openssl/openssl/commit/572844beca95068394c916626a6d3a490f831a49
- github.com/openssl/openssl/commit/7bbca05be55b129651d9df4bdb92becc45002c12
- github.com/openssl/openssl/commit/eeee3cbd4d682095ed431052f00403004596373e
- github.com/openssl/openssl/commit/ef2fb66ec571564d64d1c74a12e388a2a54d05d2
- openssl-library.org/news/secadv/20260127.txt
- cert-portal.siemens.com/productcert/html/ssa-265688.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.