8.2

CVE-2026-19024: HDF5 H5Pget_fill_value NULL Pointer Dereference via Malformed Fill Value Message

Awaiting analysis
AliasesRHSA-2026:79131UBUNTU-CVE-2026-19024DEBIAN-CVE-2026-19024
Published 05-08-2026Last modified 06-08-2026

Vulnerability summary

CVE-2026-19024 is a high (CVSS 8.2) NULL Pointer Dereference vulnerability in the hdf group hdf5. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 8.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.2, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.2/10
010
High · v4.0 (CVE.org)
EPSS score
0.18%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 05-08-2026
    PublishedVulnerability first disclosed.
  2. 06-08-2026
    Last modifiedVulnerability information updated.

Description

NULL pointer dereference in H5Pget_fill_value in HDF5 before 2.3.0 allows attackers to cause a denial of service via a dataset whose version 1 or 2 fill value message has the "defined" flag set together with a negative size field, which is not normalized to the library's "undefined" sentinel and reaches H5T_path_find with a NULL datatype.

CVSS metrics

5 scores · 5 sources · 2 versions

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

Increase +0.02 pp

From 0.17% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat10 products
  • hdf5< 0:2.2.0-0.1.3.hum1
  • hdf5-devel< 0:2.2.0-0.1.3.hum1
  • hdf5-mpich< 0:2.2.0-0.1.3.hum1
  • hdf5-mpich-devel< 0:2.2.0-0.1.3.hum1
  • hdf5-mpich-static< 0:2.2.0-0.1.3.hum1
Debian1 product
  • hdf5All versions (No fix recorded)
The hdf group1 product
Ubuntu1 product
  • hdf5All versions (No fix recorded)

4 vendors · 13 products

References

11 links
Show all 11 references