PatchSiren

LEONT CVE debriefs

These pages are published after PatchSiren validates generated defensive summaries against stored public CVE and source evidence.

Review LEONT CVE published 2026-08-09

CVE-2026-15534

Perl versions through 5.45.1 have a critical vulnerability, CVE-2026-15534, that allows for out-of-bounds heap reads and writes during regular expression matching. This occurs due to an undersized superlinear cache in S_regmatch, which can lead to potential crashes or memory corruption if exploited. The vulnerability arises from the regex engine's superlinear cache, which holds one bit per subject positio [truncated]