UBUNTU-CVE-2026-120755

Dashboard / Vulnerabilities / UBUNTU-CVE-2026-120755

UBUNTU-CVE-2026-120755

Summary:

Details: HDF5 through 2.2.0 contains an out-of-bounds read vulnerability in H5Z__filter_szip() in src/H5Zszip.c. When decoding a szip-compressed chunk, the function subtracts the 4-byte uncompressed-length header from the chunk length without first verifying that the chunk is at least 4 bytes long. A truncated or corrupted chunk shorter than the header causes the length calculation to wrap around to a very large value, and the decompressor reads far past the end of the chunk buffer. An attacker who can get a user or application to read a dataset from a crafted HDF5 file can cause a denial of service. Only builds with szip support (libaec or the szip library) are affected.

References: https://ubuntu.com/security/CVE-2026-120755, https://www.cve.org/CVERecord?id=CVE-2026-120755, https://github.com/HDFGroup/hdf5/pull/6585, https://github.com/HDFGroup/hdf5/commit/cdb13c4de9c7edbbae180f384e2e610a3b3cf185