Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via "sudoedit -s" and a command-line argument that ends with a single backslash character.
http://packetstormsecurity.com/files/161160/Sudo-Heap-Based-Buffer-Overflow.html
http://packetstormsecurity.com/files/161230/Sudo-Buffer-Overflow-Privilege-Escalation.html
http://packetstormsecurity.com/files/161270/Sudo-1.9.5p1-Buffer-Overflow-Privilege-Escalation.html
http://packetstormsecurity.com/files/161293/Sudo-1.8.31p2-1.9.5p1-Buffer-Overflow.html
http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html
http://seclists.org/fulldisclosure/2021/Feb/42
http://seclists.org/fulldisclosure/2021/Jan/79
http://seclists.org/fulldisclosure/2024/Feb/3
https://kc.mcafee.com/corporate/index?page=content&id=SB10348
https://lists.debian.org/debian-lts-announce/2021/01/msg00022.html
https://security.gentoo.org/glsa/202101-33
https://security.netapp.com/advisory/ntap-20210128-0001/
https://security.netapp.com/advisory/ntap-20210128-0002/
https://support.apple.com/kb/HT212177
https://www.debian.org/security/2021/dsa-4839
https://www.kb.cert.org/vuls/id/794544
https://www.openwall.com/lists/oss-security/2021/01/26/3
https://www.oracle.com/security-alerts/cpuapr2022.html
https://www.oracle.com//security-alerts/cpujul2021.html
https://www.oracle.com/security-alerts/cpuoct2021.html
http://www.openwall.com/lists/oss-security/2021/01/26/3
http://www.openwall.com/lists/oss-security/2021/01/27/1
http://www.openwall.com/lists/oss-security/2021/01/27/2
http://www.openwall.com/lists/oss-security/2021/02/15/1
http://www.openwall.com/lists/oss-security/2021/09/14/2