Bug 2511423

Summary: CVE-2026-17544 php: PHP: Arbitrary code execution via out-of-bounds write in bccomp() [fedora-all]
Product: [Fedora] Fedora Reporter: Abhishek Raj <abhraj>
Component: phpAssignee: Remi Collet <fedora>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: fedora, jorton
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["6dd9dac6-3623-4b3c-a015-509837738700"]}
Fixed In Version: php-8.4.24-1.fc43 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-08-07 01:36:43 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: 2509256    

Description Abhishek Raj 2026-08-05 09:18:26 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.

Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption in PHP versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9.
Comment 1 Remi Collet 2026-08-05 09:37:13 UTC 
PHP 8.5.9 already in F44 stable
Comment 2 Fedora Update System 2026-08-05 09:37:43 UTC 
FEDORA-2026-d755ca77c4 (php-8.4.24-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-d755ca77c4
Comment 3 Fedora Update System 2026-08-07 01:36:43 UTC 
FEDORA-2026-d755ca77c4 (php-8.4.24-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.