The decompression implementation in the Imf::hufUncompress function in OpenEXR 1.2.2 and 1.6.1 allows context-dependent attackers to cause a denial of service (application crash) or possibly execute arbitrary code via vectors that trigger a free of an uninitialized pointer.
https://www.redhat.com/archives/fedora-package-announce/2009-July/msg01290.html
https://www.redhat.com/archives/fedora-package-announce/2009-July/msg01286.html
http://www.us-cert.gov/cas/techalerts/TA09-218A.html
http://www.ubuntu.com/usn/USN-831-1
http://www.debian.org/security/2009/dsa-1842
http://support.apple.com/kb/HT3757
http://lists.opensuse.org/opensuse-security-announce/2009-09/msg00000.html
http://lists.apple.com/archives/security-announce/2009/Aug/msg00001.html