CVEvulnerability

CVE-2026-19028

6.8 MEDIUM Published 2026-08-06 Modified 2026-10-23 Official page ↗
Status
Awaiting Analysis
Published
2026-08-06
Last modified
2026-10-23
Assigner
0253b833-3e77-4dfe-9d57-17db1a2f0a74
CVSS 4.0 (0253b833-3e77-4dfe-9d57-17db1a2f0a74)
6.8 MEDIUM — CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weaknesses
CWE-125, CWE-1284, CWE-190

Description

H5Z__filter_fletcher32 in H5Zfletcher32.c in HDF5 prior to 2.3.0 computes the data length to checksum by subtracting the 4-byte trailing checksum size from the input buffer size without checking that the buffer is at least 4 bytes, allowing a size_t underflow. This allows attackers to cause a denial of service (massively out-of-bounds read and application crash in H5_checksum_fletcher32) via a crafted HDF5 file with a Fletcher32-filtered chunk smaller than 4 bytes, triggered via H5Dread, e.g. by the h5ls or h5dump tools.

Related

Weakness · CWE (3)

  • CWE-125 Out-of-bounds Read weakness
  • CWE-1284 Improper Validation of Specified Quantity in Input weakness
  • CWE-190 Integer Overflow or Wraparound weakness

References