There's a flaw in OpenEXR's rleUncompress functionality in versions prior to 3.0.5. An attacker who is able to submit a crafted file to an application linked with OpenEXR could cause an out-of-bounds read. The greatest risk from this flaw is to application availability.
I can see the patch is in 3.1.1, what about 2.5.x?
Should be in 2.5.7 as well, if I'm not wrong, see .  mentions PR 1036.