Bug 2568141

Summary:	CVE-2026-120440 quickjs-ng: quickjs-ng: Denial of Service via memory leak in atomic store operations [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Ganesh <gnaik>
Component:	quickjs-ng	Assignee:	Artur Frenszek-Iwicki <fedora>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	fedora
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["0fb50b92-2d3c-4a38-997c-43a1902e9813"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-11-06 14:48:07 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2565315

Description Ganesh 2026-11-06 14:14:19 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.

Comment 1 Artur Frenszek-Iwicki 2026-11-06 14:48:07 UTC

> QuickJS-NG before 0.16.0
The version currently in Fedora Rawhide is quickjs-ng-0.18.0-1.fc46.
The version currently in Fedora 45 is quickjs-ng-0.17.0-1.fc45, with quickjs-ng-0.18.0-1.fc45 being in testing.