oniguruma is vulnerable to denial of service. An attacker can cause a NULL pointer dereference in match_at() in regexec.c
which allows an attacker to cause an application crash.
access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/
access.redhat.com/errata/RHSA-2020:4827
access.redhat.com/security/updates/classification/#moderate
github.com/kkos/oniguruma/commit/c509265c5f6ae7264f7b8a8aae1cfa5fc59d108c
lists.fedoraproject.org/archives/list/[email protected]/message/JWCPDTZOIUKGMFAD5NAKUB7FPJFAIQN5/
lists.fedoraproject.org/archives/list/[email protected]/message/SNL26OZSQRVLEO6JRNUVIMZTICXBNEQW/
security.gentoo.org/glsa/201911-03