CVE-2026-120758 (GCVE-0-2026-120758)
Vulnerability from cvelistv5
Published
2026-11-03 15:38
Modified
2026-11-03 17:52
CWE
  • CWE-476 - NULL pointer dereference
Summary
HDF5 through 2.2.0 contains a NULL pointer dereference vulnerability in H5HL_unprotect() in src/H5HL.c. H5HL_protect() pins a single metadata cache entry for a local heap, either the heap prefix or the separate data block, and H5HL_unprotect() unpins it on the final unprotect. When the metadata cache destroys a corrupted local heap entry, H5HL__prfx_dest() unlinks it from the heap by setting heap->prfx or heap->dblk to NULL. A crafted HDF5 file can therefore reach H5HL_unprotect() with no cached object to unpin, and the function passes the NULL pointer to H5AC_unpin_entry(). This causes an assertion failure in debug builds and a NULL pointer dereference and crash in release builds. An attacker who can get a user or application to open and traverse a malicious file can cause a denial of service.
Impacted products
Vendor Product Version
The HDF Group HDF5 Version: < 2.3.0
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