Bug 2523251 - CVE-2026-19542 zig: Fix out-of-bounds array write in tdelete [epel-all]
Summary: CVE-2026-19542 zig: Fix out-of-bounds array write in tdelete [epel-all]
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Fedora EPEL
Classification: Fedora
Component: zig
Version: epel10
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Jan Drögehoff
QA Contact:
URL:
Whiteboard: {"flaws": ["4d7fec79-e362-437b-a5f4-e...
Depends On:
Blocks: CVE-2026-19542
TreeView+ depends on / blocked
 
Reported: 2026-08-25 06:56 UTC by Srikanth Balasubramanian
Modified: 2026-09-05 11:04 UTC (History)
8 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2026-09-05 11:04:13 UTC
Type: ---
Embargoed:


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Description Srikanth Balasubramanian 2026-08-25 06:56:33 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.

Comment 1 Renich Bon Ciric 2026-09-05 11:04:13 UTC
Zig is not affected by this vulnerability.

While `zig.spec` declares `Provides: bundled(glibc) = 2.43` to account for embedded headers and ABI symbol metadata, Zig does not bundle or compile the GNU C Library implementation of the affected routine.

Specifically:
- Zig only ships glibc ABI symbol tables (`abilists`) to generate compile-time dynamic linking stubs (`.so`), generic headers, and minimal C runtime startup objects (`crt1.o`, `elf-init`, `stat` shims).
- Zig compiler binaries and generated executables dynamically link against the host/target system's runtime `libc.so.6`.

Closing as NOTABUG.


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