Bug 2523250

Summary: CVE-2026-19542 glibc: Fix out-of-bounds array write in tdelete [fedora-all]
Product: [Fedora] Fedora Reporter: Srikanth Balasubramanian <sbalasub>
Component: glibcAssignee: Carlos O'Donell <codonell>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: arjun, codonell, dj, fberat, fweimer, jlaw, josmyers, mcermak, mcoufal, mfabian, pfrankli, sipoyare, skolosov, suraj.ghimire7
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["4d7fec79-e362-437b-a5f4-e764277e41be"]}
Fixed In Version: glibc-2.44.9000-1.fc46 glibc-2.44-2.fc45 glibc-2.43-9.fc44 glibc-2.42-17.fc43 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-10-16 13:12:03 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: 2523249    

Description Srikanth Balasubramanian 2026-08-25 06:56:28 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.

misc: Fix out-of-bounds array write in tdelete (bug 34506)
    
    Allocate the maximum array sizes directly, instead of resizing
    the arrays as needed.  This eliminates alloca usage from the
    function, and fixes the out-of-bounds accesses.  The asserts
    guard against the bug coming back if the balancing of the tree
    turns out not to work correctly.