CVE-2026-120755

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{"bugzilla": {"description": "hdf5: hdf5: Denial of Service via out-of-bounds read in szip decompression", "id": "2565912", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2565912"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in hdf5. An attacker could cause a Denial of Service (DoS) by convincing a user or application to process a specially crafted HDF5 file. When decoding szip-compressed data, the library does not verify that a data chunk is large enough before subtracting the header size, leading to an integer underflow and an out-of-bounds read that crashes the application."], "mitigation": {"lang": "en:us", "value": "Disable szip filter support in HDF5 installations and builds where szip compression is not strictly required. Avoid opening or reading datasets from HDF5 files received from untrusted sources."}, "name": "CVE-2026-120755", "package_state": [{"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Fix deferred", "package_name": "hdf5", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Fix deferred", "package_name": "hdf5", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Fix deferred", "package_name": "hdf5", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}], "public_date": "2026-11-03T15:27:42Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-120755\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-120755\nhttps://github.com/HDFGroup/hdf5/pull/6585"], "statement": "An integer underflow and out-of-bounds read vulnerability exists in HDF5's H5Z__filter_szip() function within src/H5Zszip.c when decoding szip-compressed data. By convincing a user or application to read a dataset from a crafted HDF5 file containing a chunk smaller than the four-byte uncompressed-length header, an attacker triggers an integer wraparound during length calculation, leading to an out-of-bounds read and an application crash that results in a Denial of Service.", "threat_severity": "Moderate"}

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