CVE-2021-39537
Medium
Elevated severity or exploit probability.
CVSS base
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
3.2%
87.7th percentile
CISA KEV
Not listed
Weakness / dates
CWE-787
Published 2021-09-20 · modified 2026-07-27
Description
An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.
Affected
References
- http://cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/devel/ncurses/patches/patch-ncurses_tinfo_captoinfo.c?rev=1.1&content-type=text/x-cvsweb-markup
- http://seclists.org/fulldisclosure/2022/Oct/28
- http://seclists.org/fulldisclosure/2022/Oct/41
- http://seclists.org/fulldisclosure/2022/Oct/43
- http://seclists.org/fulldisclosure/2022/Oct/45
- https://lists.debian.org/debian-lts-announce/2023/12/msg00004.html
- exploit https://lists.gnu.org/archive/html/bug-ncurses/2020-08/msg00006.html
- https://lists.gnu.org/archive/html/bug-ncurses/2021-10/msg00023.html
- https://security.netapp.com/advisory/ntap-20230427-0012/
- https://support.apple.com/kb/HT213443
- https://support.apple.com/kb/HT213444
- https://support.apple.com/kb/HT213488
- http://cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/devel/ncurses/patches/patch-ncurses_tinfo_captoinfo.c?rev=1.1&content-type=text/x-cvsweb-markup
- http://seclists.org/fulldisclosure/2022/Oct/28
- http://seclists.org/fulldisclosure/2022/Oct/41
- http://seclists.org/fulldisclosure/2022/Oct/43
- http://seclists.org/fulldisclosure/2022/Oct/45
- https://lists.debian.org/debian-lts-announce/2023/12/msg00004.html
- exploit https://lists.gnu.org/archive/html/bug-ncurses/2020-08/msg00006.html
- https://lists.gnu.org/archive/html/bug-ncurses/2021-10/msg00023.html
- https://security.netapp.com/advisory/ntap-20230427-0012/
- https://support.apple.com/kb/HT213443
- https://support.apple.com/kb/HT213444
- https://support.apple.com/kb/HT213488