CVE-2026-2474
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()
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.
INFO
Published Date :
Feb. 16, 2026, 9:22 p.m.
Last Modified :
March 4, 2026, 2:27 a.m.
Remotely Exploit :
Yes !
Source :
9b29abf9-4ab0-4765-b253-1875cd9b441e
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update Crypt::URandom to version 0.55 or later.
- Apply vendor patches for affected Perl installations.
- Validate length parameters to prevent integer wraparound.
- Avoid passing untrusted input for length.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-2474.
| URL | Resource |
|---|---|
| https://metacpan.org/release/DDICK/Crypt-URandom-0.54/source/URandom.xs#L35-79 | Issue Tracking |
| https://metacpan.org/release/DDICK/Crypt-URandom-0.55/source/Changes | Release NotesProduct |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-2474 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-2474
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-2474 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-2474 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 04, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:ddick:crypt::urandom:*:*:*:*:*:perl:*:* versions from (including) 0.41 up to (excluding) 0.55 Added Reference Type CPANSec: https://metacpan.org/release/DDICK/Crypt-URandom-0.54/source/URandom.xs#L35-79 Types: Issue Tracking Added Reference Type CPANSec: https://metacpan.org/release/DDICK/Crypt-URandom-0.55/source/Changes Types: Product, Release Notes -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Feb. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H -
New CVE Received by 9b29abf9-4ab0-4765-b253-1875cd9b441e
Feb. 16, 2026
Action Type Old Value New Value Added 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. Added CWE CWE-122 Added CWE CWE-1284 Added Reference https://metacpan.org/release/DDICK/Crypt-URandom-0.54/source/URandom.xs#L35-79 Added Reference https://metacpan.org/release/DDICK/Crypt-URandom-0.55/source/Changes