CVE-2026-58101

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/dsully/perl-crypt-openssl-x509/commit/4c1e2370556097c253ae27abe9e1097ea377fbd2.patch	Patch
https://metacpan.org/release/JONASBN/Crypt-OpenSSL-X509-2.1.3/source/Changes.md	Release Notes

Configurations

Configuration 1 (hide)

cpe:2.3:a:jonasbn:crypt\:\:openssl\:\:x509:*:*:*:*:*:perl:*:*

History

11 Aug 2026, 01:16

Type	Values Removed	Values Added
First Time		Jonasbn crypt\ Jonasbn
References	~~() https://github.com/dsully/perl-crypt-openssl-x509/commit/4c1e2370556097c253ae27abe9e1097ea377fbd2.patch -~~	() https://github.com/dsully/perl-crypt-openssl-x509/commit/4c1e2370556097c253ae27abe9e1097ea377fbd2.patch - Patch
References	~~() https://metacpan.org/release/JONASBN/Crypt-OpenSSL-X509-2.1.3/source/Changes.md -~~	() https://metacpan.org/release/JONASBN/Crypt-OpenSSL-X509-2.1.3/source/Changes.md - Release Notes
CPE		cpe:2.3:a:jonasbn:crypt\:\:openssl\:\:x509::::::perl::*

14 Jul 2026, 13:18

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

13 Jul 2026, 23:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-13 23:16

Updated : 2026-08-11 01:16

NVD link : CVE-2026-58101

Mitre link : CVE-2026-58101

CVE.ORG link : CVE-2026-58101

JSON object : View

Products Affected

jonasbn

crypt\

CWE

CWE-476

NULL Pointer Dereference

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