description: A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time. If it is built to use the synchronous resolver, it allows name resolves to time-out slow operations using `alarm()` and `siglongjmp()`. When doing this, libcurl used a global buffer that was not mutex protected and a multi-threaded application might therefore crash or otherwise misbehave.
problem types: Denial of Service (CWE-400)
affected:
{
vendor: n/a
product: https://github.com/curl/curl
versions:
version: Fixed in 8.1.0, status: affected
}