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CVE-2026-92627

Heap Use-After-Free in H5T__conv_f_f

CVSS 4.0 4.6 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-92627

Published

A heap-use-after-free vulnerability exists in H5T__conv_f_f() in src/H5Tconv.c in HDF5 before 1.14.2. When converting a compound datatype containing floating-point members during a dataset read, a temporary buffer allocated with calloc() is freed and subsequently read from within the same conversion routine. An attacker who can supply a crafted HDF5 file containing a specially constructed compound datatype can trigger the use-after-free when the file is parsed by an application that reads the affected dataset, such as h5dump. This can result in a crash and, depending on heap layout and allocator behavior, may be exploitable for further memory corruption up to remote code execution.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-92627

Published

HDF5

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "The HDF Group",
                    "product": "HDF5",
                    "modules": [
                        "src/H5Tconv.c"
                    ],
                    "versions": [
                        {
                            "status": "affected",
                            "version": "< 1.14.2"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON