NULL pointer dereference in Jonasbn Crypt\
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.
EPSS: 0.003 (23.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Jonasbn Crypt\ — versions \
- Jonasbn Crypt::openssl::x509 — versions 0
- Jonasbn Crypt\:\:openssl\:\:x509
Weakness classification (CWE)
References
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (Patch, patch)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes, Release Notes)
Frequently asked questions
- What is CVE-2026-58101?
- CVE-2026-58101 is a high-severity vulnerability in Jonasbn Crypt\, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-07-13.
- How severe is CVE-2026-58101?
- High severity. CVSS v3 base score is 7.5 out of 10.