CVE-2026-19028Disclosure

LOWCVSS 6.8 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-125CWE-190CWE-1284

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

2 mentions across 1 observed day

What's happening

Technical details provided in 2 signals
Disclosure: 2 classified signals
2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets3 URLs

By indicator

Full discourse2 posts

Vulmon Vulnerability Feed@VulmonFeeds91d
Disclosure
CVE-2026-19028 Integer Underflow Denial of Service in HDF5 Fletcher32 Filter Thr... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-19028 Vulnerability Alert Subscriptions: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=1
Post summary
The entry announces CVE‑2026‑19028, an integer underflow denial‑of‑service flaw in HDF5’s Fletcher32 filter, and links to a generic details page without providing PoC, exploit, or patch information.
00000116
4.1K followersView on X
CVE@CVEnew91d
Disclosure
CVE-2026-19028 H5Z__filter_fletcher32 in H5Zfletcher32.c in HDF5 through 2.3.0 computes the data length to checksum by subtracting the 4-byte trailing checksum size from the input b… https://www.cve.org/CVERecord?id=CVE-2026-19028
Post summary
The snippet reports on CVE-2026-19028, highlighting a technical flaw in HDF5’s checksum calculation, but provides no PoC, exploit, active exploitation evidence, or patch information.
000001.5K
57.9K followersView on X

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