Description: concurrency use-after-free in vt
References:
 https://www.openwall.com/lists/oss-security/2020/10/30/1
Notes:
 carnil> Fixed in 5.9.5.
Bugs:
upstream: released (5.10-rc3) [90bfdeef83f1d6c696039b6a917190dcbbad3220]
4.19-upstream-stable: released (4.19.155) [619e366268e0430687d07b24b48f7382fc088c9f]
4.9-upstream-stable: released (4.9.242) [ea5dd52c3568e0f7232c20fd4adf551fcad07c60]
sid: released (5.9.6-1)
4.19-buster-security: released (4.19.160-1)
4.9-stretch-security: released (4.9.246-1)