CVE-2026-120758

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{"bugzilla": {"description": "hdf5: hdf5: Denial of Service via NULL pointer dereference", "id": "2566027", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2566027"}, "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-476", "details": ["A flaw was found in HDF5. An attacker can cause a Denial of Service (DoS) by convincing a user or application to open a specially crafted HDF5 file. Due to improper handling of corrupted metadata in local heap structures, the library attempts to dereference a NULL pointer during cache operations, resulting in an application crash."], "mitigation": {"lang": "en:us", "value": "Restrict file permissions to ensure HDF5 files are ingested exclusively from verified, trusted sources. Run file-parsing workloads within isolated containers or constrained sandbox environments to limit the impact of process termination."}, "name": "CVE-2026-120758", "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": "Affected", "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": "2026-11-03T15:38:09Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-120758\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-120758\nhttps://github.com/HDFGroup/hdf5/pull/6377"], "statement": "A NULL pointer dereference vulnerability was found in HDF5's H5HL_unprotect() function in src/H5HL.c. When processing a crafted file containing corrupted local heap metadata, a previously destroyed cache entry leaves internal heap pointers unlinked, causing the library to pass a NULL pointer to H5AC_unpin_entry(). An attacker who convinces a user or application to open and traverse a specially crafted HDF5 file can trigger an application crash, resulting in a denial of service.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.3.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "HDF5", "source": "cna", "vendor": "The HDF Group"}, "product": "hdf5", "vendor": "hdfgroup"}], "created": "2026-11-03T16:45:13.733265+00:00", "updated": "2026-11-03T16:45:14.066916+00:00", "vendors": ["hdfgroup", "hdfgroup$PRODUCT$hdf5"]}