Calling wordexp with WRDE_APPEND in the GNU C Library version 2.0 to version 2.43 can cause the interface to return invalid memory in the we_wordv member, which on subsequent calls to wordfree may abort the process.
Exploitability
AV:LAC:HAT:PPR:NUI:NVulnerable System
VC:LVI:LVA:LSubsequent System
SC:LSI:LSA:L2.1/CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/S:P/AU:Y/U:GreenOther