lib/pk-libgcrypt.c in libgnutls in GnuTLS before 2.6.6 does not properly handle invalid DSA signatures, which allows remote attackers to cause a denial of service (application crash) and possibly have unspecified other impact via a malformed DSA key that triggers a (1) free of an uninitialized pointer or (2) double free.
AV:N/AC:M/Au:N/C:N/I:N/A:P
This vulnerability has a 7.92% probability of being exploited in the next 30 days, ranking higher than 95% of all scored CVEs.