In libyal libfwsi before 20191006, libfwsi_extension_block_copy_from_byte_stream in libfwsi_extension_block.c has a heap-based buffer over-read because rejection of an unsupported size only considers values less than 6, even though values of 6 and 7 are also unsupported. NOTE: the vendor has disputed this as described in the GitHub issue

XnView Classic 2.49.1 allows a User Mode Write AV starting at Xwsq+0x0000000000001fc0.

XnView Classic 2.49.1 allows a User Mode Write AV starting at Xwsq+0x0000000000001e51.

MPC-HC through 1.7.13 allows a Read Access Violation on a Block Data Move starting at mpc_hc!memcpy+0x000000000000004e.

KMPlayer 4.2.2.31 allows a User Mode Write AV starting at utils!src_new+0x000000000014d6ee.

IrfanView 4.53 allows Data from a Faulting Address to control a subsequent Write Address starting at JPEG_LS+0x000000000000839c.

IrfanView 4.53 allows a Exception Handler Chain to be Corrupted starting at EXR!ReadEXR+0x000000000002af80.

IrfanView 4.53 allows a User Mode Write AV starting at DPX!ReadDPX_W+0x0000000000001203.

IrfanView 4.53 allows a User Mode Write AV starting at EXR!ReadEXR+0x0000000000010836.

IrfanView 4.53 allows Data from a Faulting Address to control a subsequent Write Address starting at FORMATS!Read_BadPNG+0x0000000000000101.

IrfanView 4.53 allows a User Mode Write AV starting at JPEG_LS+0x000000000000a6b8.

IrfanView 4.53 allows a User Mode Write AV starting at FORMATS!Read_BadPNG+0x0000000000000115.

IrfanView 4.53 allows a User Mode Write AV starting at FORMATS!GetPlugInInfo+0x0000000000007d43.

IrfanView 4.53 allows a User Mode Write AV starting at WSQ!ReadWSQ+0x00000000000042f5.

IrfanView 4.53 allows a User Mode Write AV starting at WSQ!ReadWSQ+0x000000000000d57b.

IrfanView 4.53 allows a User Mode Write AV starting at WSQ!ReadWSQ+0x00000000000025b6.

IrfanView 4.53 allows Data from a Faulting Address to control a subsequent Write Address starting at JPEG_LS+0x0000000000007da8.

IrfanView 4.53 allows a User Mode Write AV starting at WSQ!ReadWSQ+0x000000000000258c.

IrfanView 4.53 allows a User Mode Write AV starting at WSQ!ReadWSQ+0x0000000000004359.

IrfanView 4.53 allows Data from a Faulting Address to control Code Flow starting at JPEG_LS+0x0000000000001d8a.