CVE-2026-3548

Description

Two buffer overflow vulnerabilities existed in the wolfSSL CRL parser when parsing CRL numbers: a heap-based buffer overflow could occur when improperly storing the CRL number as a hexadecimal string, and a stack-based overflow for sufficiently sized CRL numbers. With appropriately crafted CRLs, either of these out of bound writes could be triggered. Note this only affects builds that specifically enable CRL support, and the user would need to load a CRL from an untrusted source.

PUBLISHED Reserved 2026-03-04 | Published 2026-03-19 | Updated 2026-03-19 | Assigner wolfSSL

Problem types

CWE-787 Out-of-bounds Write

CWE-122 Heap-based Buffer Overflow

Product status

References

github.com/wolfSSL/wolfssl/pull/9628/

github.com/wolfSSL/wolfssl/pull/9873/

cve.org (CVE-2026-3548)

nvd.nist.gov (CVE-2026-3548)

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