X509V3_EXT_d2i(ext) returns NULL when an extension's DER value fails to parse. basicC, ia5string, and auth_att dereference its result without a NULL check. keyid_data also dereferences akid->keyid, which is NULL for an empty AKI SEQUENCE (DER 30 00) even when the parse succeeds.
A caller invoking an affected helper on an extension from an untrusted certificate triggers a SIGSEGV that crashes the Perl process.
Analysis
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| JONASBN | Crypt::OpenSSL::X509 | unaffected |
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Vendor Solution
Upgrade to Crypt::OpenSSL::X509 2.1.3 or later, which NULL-checks each X509V3_EXT_d2i result and the optional keyid field before dereferencing.
Tracking
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Tue, 14 Jul 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
cvssV3_1
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Mon, 13 Jul 2026 22:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow denial of service via NULL pointer dereference. X509V3_EXT_d2i(ext) returns NULL when an extension's DER value fails to parse. basicC, ia5string, and auth_att dereference its result without a NULL check. keyid_data also dereferences akid->keyid, which is NULL for an empty AKI SEQUENCE (DER 30 00) even when the parse succeeds. A caller invoking an affected helper on an extension from an untrusted certificate triggers a SIGSEGV that crashes the Perl process. | |
| Title | Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow denial of service via NULL pointer dereference | |
| Weaknesses | CWE-476 | |
| References |
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-07-14T12:45:11.194Z
Reserved: 2026-06-29T06:35:04.717Z
Link: CVE-2026-58101
Vulnrichment
Updated: 2026-07-14T12:44:58.448Z
NVD
No data.
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-07-16T08:15:04Z