description: A use-after-free vulnerability was found in systemd. This issue occurs due to the on_stream_io() function and dns_stream_complete() function in 'resolved-dns-stream.c' not incrementing the reference counting for the DnsStream object. Therefore, other functions and callbacks called can dereference the DNSStream object, causing the use-after-free when the reference is still used later.
problem types: CWE-416
affected:
{
vendor: n/a
product: systemd-resolved
versions:
version: systemd 240, status: affected
}