UBUNTU-CVE-2026-2597

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Source

https://ubuntu.com/security/CVE-2026-2597

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2597.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-2597

Upstream

CVE-2026-2597

Published

2026-02-27T00:16:00Z

Modified

2026-05-20T16:24:48.491434206Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

Crypt::SysRandom::XS versions before 0.010 for Perl is vulnerable to a heap buffer overflow in the XS function randombytes(). 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 chosen random function (e.g. getrandom) passes the original negative value, which is implicitly converted to a large unsigned value (typically SIZEMAX). 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.

References

Affected packages

Ubuntu:25.10 / libcrypt-sysrandom-xs-perl

Package

Name: libcrypt-sysrandom-xs-perl
Purl: pkg:deb/ubuntu/libcrypt-sysrandom-xs-perl?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.009-2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libcrypt-sysrandom-xs-perl",
            "binary_version": "0.009-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2597.json"

Ubuntu:26.04:LTS / libcrypt-sysrandom-xs-perl