CVE-2025-2912: HDF5 H5Omessage.c H5O_msg_flush heap-based overflow
CSIRTS triage
- What
- HDF5 library H5Omessage.c contains heap-based buffer overflow in H5O_msg_flush function.
- Who is affected
- Systems using HDF5 library to process untrusted HDF5 files are vulnerable.
- Urgency
- Low urgency; CVSS 3.3 indicates limited exploitability and impact scope.
- Action
- Update HDF5 library to a patched version addressing CVE-2025-2912.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch HDF5
Get an email when a new HDF5 advisory drops — max one per day, one-click unsubscribe.
Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-2912
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2025-29120.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-2912 | coverage & exploitation status | NVD · CVE.org |
More from Microsoft Security Response Center
- highCVE-2025-40776: Birthday Attack against Resolvers supporting ECS2026-08-06
- lowCVE-2026-3632: Libsoup: libsoup: http smuggling and server-side request forgery via malformed hostnames2026-08-06
- unknownCVE-2026-58039: CVE-2026-580392026-08-06
- mediumCVE-2025-21870: ASoC: SOF: ipc4-topology: Harden loops for looking up ALH copiers2026-08-06
- mediumCVE-2026-23247: tcp: secure_seq: add back ports to TS offset2026-08-06