CVE-2026-111151

Description

OpenJPH through 0.32.0 contains a heap out-of-bounds write vulnerability in the HTJ2K cleanup-pass decoder that allows attackers to corrupt memory via one-row codeblocks. Attackers can supply a crafted .j2c or .jph codestream with small precinct sizes, causing the decoder to write a second row past the codeblock buffer, resulting in memory corruption and crashes.

References

• https://github.com/aous72/OpenJPH
• https://github.com/aous72/OpenJPH/blob/23c422895ce6c3a156935222e4715ee0b7be952c/src/core/codestream/ojph_codeblock.cpp#L79-L84
• https://github.com/aous72/OpenJPH/blob/23c422895ce6c3a156935222e4715ee0b7be952c/src/core/codestream/ojph_subband.cpp#L136-L142
• https://github.com/aous72/OpenJPH/blob/23c422895ce6c3a156935222e4715ee0b7be952c/src/core/coding/ojph_block_decoder32.cpp#L1135-L1155
• https://hackmd.io/@haind-pwn/openjph-htj2k-degenerate-codeblock-cleanup-oob-write