CVE-2025-2913: HDF5 H5FL.c H5FL__blk_gc_list use after free
CSIRTS triage
- What
- Use-after-free in H5FL block garbage collection list.
- Who is affected
- Applications using HDF5 library for data processing.
- Urgency
- Low priority; CVSS 3.3; limited exploitability unless triggered via untrusted HDF5 files.
- Action
- Update HDF5 library to patched version with safe block list garbage collection.
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-2025-2913
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-2025-29130.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-2913 | 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