[LTP] [PATCH] Add test for CVE 2026-53362

[Petr Vorel]

Hi Andrea, Martin,

> Merged, Thanks!

> With suggested changes

FYI Andrea by accident added unrelated testcases/cve/cve-2026-43499.md and
testcases/cve/refluxfs (binary file!) which obviously weren't part of Martin's
patch [1]. I removed that in 2a002a2c7b [2].

Kind regards,
Petr

[1] https://lore.kernel.org/ltp/20260721153917.64722-1-mdoucha@suse.cz/
[2] https://github.com/linux-test-project/ltp/commit/2a002a2c7b0a5433f22d2684c50a60ed12ccff70