CVE-2026-58101
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductJonasbn Crypt\
PublishedJul 13, 2026
First seenJul 13, 2026
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- jonasbn crypt\2.1.3 or later
Patches
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| jonasbn crypt\ | \ ≤ v < 2.1.3 | 2.1.3 |
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