In the GNU C Library (aka glibc or libc6) through 2.29, proceed_next_node in posix/regexec.c has a heap-based buffer over-read via an attempted case-insensitive regular-expression match.
https://sourceware.org/bugzilla/show_bug.cgi?id=24114
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34142
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34140
http://www.securityfocus.com/bid/107160
https://security.netapp.com/advisory/ntap-20190315-0002/
https://kc.mcafee.com/corporate/index?page=content&id=SB10278
https://support.f5.com/csp/article/K54823184
https://security.gentoo.org/glsa/202006-04
Source: MITRE
Published: 2019-02-26
Updated: 2022-04-20
Type: CWE-125
Base Score: 7.5
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 10
Severity: HIGH
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 3.9
Severity: CRITICAL