Bug 2511502

Summary: CVE-2026-59879 mozjs78: Immutable.js: Denial of Service due to mishandling of large index values in List operations [epel-all]
Product: [Fedora] Fedora EPEL Reporter: Vipul Nair <vinair>
Component: mozjs78Assignee: František Zatloukal <fzatlouk>
Status: CLOSED WONTFIX QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: epel10CC: epel-packagers-sig, fzatlouk, kalevlember
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["91ec21a5-1ddf-475b-b59d-a6713c7862e5"]}
Fixed In Version: Doc Type: ---
Doc Text:
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Clone Of: Environment:
Last Closed: 2026-10-06 08:09:54 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2498158    

Description Vipul Nair 2026-08-05 12:49:19 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.

Immutable.js provides many Persistent Immutable data structures. Prior to 4.3.9 and 5.1.8, List#set, List#setSize, List#setIn, List#updateIn, and the functional set, setIn, and updateIn mishandle an index or size in the range 2 ** 30 to 2 ** 31 in setListBounds in src/List.js, causing an empty List to enter an uncatchable infinite loop, a populated List to allocate without bound until process abort, or setSize to silently wrap large values. This issue is fixed in versions 4.3.9 and 5.1.8.
Comment 1 František Zatloukal 2026-10-06 08:09:54 UTC 
Closing CVE bug as not relevant to the mozjs package, and there is sadly no option to opt out from these reports :( .