Bug 2496390

Summary: CVE-2026-13574 llvm: LLVM: Denial of service via heap-based buffer overflow in Bitcode File Handler [fedora-all]
Product: [Fedora] Fedora Reporter: Ganesh <gnaik>
Component: llvmAssignee: Tulio Magno Quites Machado Filho <tuliom>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: dmalcolm, fedora-llvm-team, jakub, jchecahi, jistone, kkleine, npopov, petersen, scottt.tw, sergesanspaille, siddharth.kde, suraj.ghimire7, tbaeder, tstellar, tuliom
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["cc104964-3d04-487f-8b2b-a3101b68b737"]}
Fixed In Version: llvm-22.1.8-4.fc44 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-07-23 01:20:38 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: 2494420    

Description Ganesh 2026-07-02 07:49:19 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.

A vulnerability was determined in llvm llvm-project up to 22.1.6. This impacts the function GCRelocateInst::getBasePtr in the library llvm/lib/IR/IntrinsicInst.cpp of the component Bitcode File Handler. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

Comment 1 Tulio Magno Quites Machado Filho 2026-07-13 18:13:02 UTC
I proposed a backport to this issue for Rawhide at https://src.fedoraproject.org/rpms/llvm/pull-request/620

Comment 2 Fedora Update System 2026-07-21 09:26:20 UTC
FEDORA-2026-597e8f9de1 (llvm-22.1.8-4.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-597e8f9de1

Comment 3 Fedora Update System 2026-07-22 01:43:07 UTC
FEDORA-2026-597e8f9de1 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-597e8f9de1`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-597e8f9de1

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-07-23 01:20:38 UTC
FEDORA-2026-597e8f9de1 (llvm-22.1.8-4.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.