View at Official ubuntu advisory, NVD, CVE.org · CVE detail
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
CVE-2017-8911 medium priority: Ubuntu including 1 source packages (tnef), 5 status rows across 5 suites (trusty, upstream, xenial, yakkety, zesty): released 4, needs-triage 1.
An integer underflow has been identified in the unicode_to_utf8() function in tnef 1.4.14. This might lead to invalid write operations, controlled by an attacker.