Vulnerability Description
Crypt::URandom versions from 0.41 before 0.55 for Perl is vulnerable to a heap buffer overflow in the XS function crypt_urandom_getrandom(). The function does not validate that the length parameter is non-negative. If a negative value (e.g. -1) is supplied, the expression length + 1u causes an integer wraparound, resulting in a zero-byte allocation. The subsequent call to getrandom(data, length, GRND_NONBLOCK) passes the original negative value, which is implicitly converted to a large unsigned value (typically SIZE_MAX). This can result in writes beyond the allocated buffer, leading to heap memory corruption and application crash (denial of service). In common usage, the length argument is typically hardcoded by the caller, which reduces the likelihood of attacker-controlled exploitation. Applications that pass untrusted input to this parameter may be affected.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ddick | Crypt\ | >= 0.41, < 0.55, \ |
Related Weaknesses (CWE)
References
- https://metacpan.org/release/DDICK/Crypt-URandom-0.54/source/URandom.xs#L35-79Issue Tracking
- https://metacpan.org/release/DDICK/Crypt-URandom-0.55/source/ChangesRelease NotesProduct
FAQ
What is CVE-2026-2474?
CVE-2026-2474 is a vulnerability with a CVSS score of 7.5 (HIGH). Crypt::URandom versions from 0.41 before 0.55 for Perl is vulnerable to a heap buffer overflow in the XS function crypt_urandom_getrandom(). The function does not validate that the length parameter i...
How severe is CVE-2026-2474?
CVE-2026-2474 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-2474?
Check the references section above for vendor advisories and patch information. Affected products include: Ddick Crypt\.