Bug 2523249 (CVE-2026-19542) - CVE-2026-19542 glibc: Fix out-of-bounds array write in tdelete
Summary: CVE-2026-19542 glibc: Fix out-of-bounds array write in tdelete
Keywords:
Status: NEW
Alias: CVE-2026-19542
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2523250 2523251 2523252
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-25 06:50 UTC by OSIDB Bzimport
Modified: 2026-11-03 12:28 UTC (History)
22 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2026:80517 0 None None None 2026-10-12 01:43:43 UTC
Red Hat Product Errata RHBA-2026:80793 0 None None None 2026-10-12 11:34:55 UTC
Red Hat Product Errata RHBA-2026:82861 0 None None None 2026-10-14 10:39:31 UTC
Red Hat Product Errata RHBA-2026:82891 0 None None None 2026-10-14 11:47:16 UTC
Red Hat Product Errata RHBA-2026:83558 0 None None None 2026-10-15 12:27:55 UTC
Red Hat Product Errata RHSA-2026:79281 0 None None None 2026-10-08 19:13:14 UTC
Red Hat Product Errata RHSA-2026:80798 0 None None None 2026-10-12 16:36:35 UTC

Description OSIDB Bzimport 2026-08-25 06:50:00 UTC 
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.
Comment 2 Jon Orris 2026-10-08 19:13:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:79281 https://access.redhat.com/errata/RHSA-2026:79281
Comment 3 Jon Orris 2026-10-12 16:36:33 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:80798 https://access.redhat.com/errata/RHSA-2026:80798
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