The DNP dissector could crash. It may be possible to make Wireshark crash by injecting a malformed packet onto the wire or by convincing someone to read a malformed packet trace file.
Created wireshark tracking bugs for this issue: Affects: fedora-all [bug 2001873]
Bug was introduced in the following commit that intended to fix a memory leak: https://gitlab.com/wireshark/wireshark/-/commit/618661b22e34a59b21117db723d8ff91e064d4ba However, due to the version used in RHEL-8 and below, this commit was never introduced to our stream. As such we are not vulnerable or affected by this CVE. RHEL-9 uses an already patched version that has this CVE Fixed. As such no RHEL Versions are affected.
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2021-22235