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-2015-5523 low priority: Ubuntu including 1 source packages (tidy), 5 status rows across 5 suites (precise, trusty, upstream, utopic, vivid): released 4, ignored 1.
The ParseValue function in lexer.c in tidy before 4.9.31 allows remote attackers to cause a denial of service (crash) via vectors involving multiple whitespace characters before an empty href, which triggers a large memory allocation.