UBUNTU-CVE-2026-120440

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Source

https://ubuntu.com/security/CVE-2026-120440

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120440.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-120440

Upstream

CVE-2026-120440

Published

2026-11-03T00:00:00Z

Modified

2026-11-04T03:30:38Z

Severity

5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

QuickJS-NG before 0.16.0 contains a memory leak vulnerability in js_atomics_store() in quickjs.c that fails to free the converted value when returning a RangeError. Attackers running JavaScript can repeatedly call Atomics.store with a valueOf that detaches or shrinks the buffer to exhaust heap memory and cause denial of service.

References

Affected packages

Ubuntu:26.10 / quickjs-ng

Package

Name: quickjs-ng
Purl: pkg:deb/ubuntu/quickjs-ng?arch=source&distro=stonking

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.15.0-1

0.15.1-1

0.16.2-2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libqjs0",
            "binary_version": "0.16.2-2"
        },
        {
            "binary_name": "qjs",
            "binary_version": "0.16.2-2"
        },
        {
            "binary_name": "qjs-src",
            "binary_version": "0.16.2-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120440.json"