CVE-2026-17573

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-07-27. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this weekElevated
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: Elevated riskExposed: 0

A fix is available — apply it.

A double free vulnerability was discovered in the HDF5 library. Processing a crafted HDF5 file containing an oversized chunk size field via h5repack may cause the application to abort due to a double free.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

July 27, 2026

Last Modified

August 18, 2026

Advisory Details (1)

Auto-updated Jul 27, 2026
No patch confirmed yet.
generic

h5repack aborts due to double free when using -c with --enable-error-stack · Issue #6124 · HDFGroup/hdf5 · GitHub

https://github.com/HDFGroup/hdf5/issues/6124

Vendor Advisories for CVE-2026-17573(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhathdf5-main-2.2.0-0.1.1.hum12026-08-31redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
hdf51.10.10+repack-1 ... 2.1.0+repack-1~exp9 (83 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
hdf51.10.10+repack-1 ... 2.2.0+repack-4 (76 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
hdf51.14.5+repack-3 ... 2.2.0+repack-4 (45 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
hdf51.14.5+repack-3 ... 2.1.0+repack-1~exp9 (40 versions)2.1.0+repack-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 25× in last 7d / 81× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 136 total refreshes for this CVE.

  1. 2026-09-15 09:10 UTCEG score recompute
  2. 2026-09-15 09:10 UTCVendor advisory
  3. 2026-09-15 09:10 UTCGHSA enrichment
  4. 2026-09-14 06:27 UTCEG score recompute
  5. 2026-09-14 06:27 UTCVendor advisory
  6. 2026-09-14 06:27 UTCGHSA enrichment
  7. 2026-09-13 16:46 UTCEPSS rescore
  8. 2026-09-13 06:59 UTCEG score recompute
  9. 2026-09-13 06:59 UTCVendor advisory
  10. 2026-09-13 06:59 UTCGHSA enrichment
  11. 2026-09-12 15:00 UTCEPSS rescore
  12. 2026-09-12 07:13 UTCEG score recompute
  13. 2026-09-12 07:13 UTCVendor advisory
  14. 2026-09-12 07:13 UTCGHSA enrichment
  15. 2026-09-11 14:52 UTCEPSS rescore
  16. 2026-09-11 09:36 UTCEPSS rescore
  17. 2026-09-11 07:45 UTCEG score recompute
  18. 2026-09-11 07:45 UTCVendor advisory
  19. 2026-09-11 07:45 UTCGHSA enrichment
  20. 2026-09-10 09:34 UTCEPSS rescore
  21. 2026-09-10 08:16 UTCVendor advisory
  22. 2026-09-10 08:16 UTCGHSA enrichment
  23. 2026-09-09 08:20 UTCEG score recompute
  24. 2026-09-09 08:20 UTCVendor advisory
  25. 2026-09-09 08:20 UTCGHSA enrichment
Show 75 more
  1. 2026-09-08 22:00 UTCEPSS rescore
  2. 2026-09-07 21:03 UTCEG score recompute
  3. 2026-09-07 21:03 UTCGHSA enrichment
  4. 2026-09-07 16:01 UTCEPSS rescore
  5. 2026-09-06 18:43 UTCEG score recompute
  6. 2026-09-06 18:43 UTCGHSA enrichment
  7. 2026-09-06 13:47 UTCEPSS rescore
  8. 2026-09-05 19:15 UTCEG score recompute
  9. 2026-09-05 19:15 UTCGHSA enrichment
  10. 2026-09-04 12:32 UTCEG score recompute
  11. 2026-09-04 12:32 UTCGHSA enrichment
  12. 2026-09-04 05:06 UTCEPSS rescore
  13. 2026-09-01 22:59 UTCEG score recompute
  14. 2026-09-01 22:59 UTCGHSA enrichment
  15. 2026-09-01 13:53 UTCEPSS rescore
  16. 2026-09-01 04:39 UTCEPSS rescore
  17. 2026-08-30 23:21 UTCEG score recompute
  18. 2026-08-30 23:21 UTCGHSA enrichment
  19. 2026-08-30 19:17 UTCEPSS rescore
  20. 2026-08-30 01:22 UTCEPSS rescore
  21. 2026-08-29 23:52 UTCEG score recompute
  22. 2026-08-29 23:52 UTCGHSA enrichment
  23. 2026-08-28 21:41 UTCEPSS rescore
  24. 2026-08-27 21:00 UTCEG score recompute
  25. 2026-08-27 21:00 UTCGHSA enrichment
  26. 2026-08-27 14:25 UTCEPSS rescore
  27. 2026-08-26 19:44 UTCEG score recompute
  28. 2026-08-26 19:44 UTCGHSA enrichment
  29. 2026-08-26 14:46 UTCEPSS rescore
  30. 2026-08-25 17:41 UTCEG score recompute
  31. 2026-08-25 17:41 UTCGHSA enrichment
  32. 2026-08-25 13:48 UTCEPSS rescore
  33. 2026-08-24 17:59 UTCEG score recompute
  34. 2026-08-24 17:59 UTCGHSA enrichment
  35. 2026-08-23 17:49 UTCEG score recompute
  36. 2026-08-23 17:49 UTCGHSA enrichment
  37. 2026-08-23 00:19 UTCEPSS rescore
  38. 2026-08-22 18:21 UTCEG score recompute
  39. 2026-08-22 18:21 UTCGHSA enrichment
  40. 2026-08-21 23:49 UTCEPSS rescore
  41. 2026-08-21 18:53 UTCEG score recompute
  42. 2026-08-21 18:53 UTCGHSA enrichment
  43. 2026-08-20 22:55 UTCEPSS rescore
  44. 2026-08-20 19:25 UTCGHSA enrichment
  45. 2026-08-19 19:57 UTCEG score recompute
  46. 2026-08-19 19:57 UTCGHSA enrichment
  47. 2026-08-19 17:03 UTCEPSS rescore
  48. 2026-08-18 19:04 UTCEG score recompute▲ 1.50
  49. 2026-08-18 19:04 UTCGHSA enrichment
  50. 2026-08-18 19:03 UTCNVD updateCVSS v3 → 5.5
  51. 2026-08-18 13:48 UTCEPSS rescore
  52. 2026-08-18 10:17 UTCEG score recompute
  53. 2026-08-18 10:17 UTCGHSA enrichment
  54. 2026-08-17 13:47 UTCEPSS rescore
  55. 2026-08-17 10:48 UTCEG score recompute
  56. 2026-08-17 10:48 UTCGHSA enrichment
  57. 2026-08-16 14:56 UTCEPSS rescore
  58. 2026-08-16 11:20 UTCEG score recompute
  59. 2026-08-16 11:20 UTCGHSA enrichment
  60. 2026-08-16 02:14 UTCEPSS rescore
  61. 2026-08-15 11:53 UTCEG score recompute
  62. 2026-08-15 11:53 UTCGHSA enrichment
  63. 2026-08-15 01:30 UTCEPSS rescore
  64. 2026-08-14 12:24 UTCEG score recompute
  65. 2026-08-14 12:24 UTCGHSA enrichment
  66. 2026-08-13 22:00 UTCEPSS rescore
  67. 2026-08-13 12:56 UTCEG score recompute
  68. 2026-08-13 12:56 UTCGHSA enrichment
  69. 2026-08-12 13:50 UTCEPSS rescore
  70. 2026-08-12 13:28 UTCGHSA enrichment
  71. 2026-08-11 14:00 UTCEG score recompute
  72. 2026-08-11 14:00 UTCGHSA enrichment
  73. 2026-08-11 00:00 UTCEPSS rescore
  74. 2026-08-10 14:32 UTCGHSA enrichment
  75. 2026-08-09 15:03 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-17573?
CVE-2026-17573 is a medium vulnerability published on July 27, 2026. A double free vulnerability was discovered in the HDF5 library. Processing a crafted HDF5 file containing an oversized chunk size field via h5repack may cause the application to abort due to a double free.
When was CVE-2026-17573 disclosed?
CVE-2026-17573 was first published in the National Vulnerability Database on July 27, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-17573 actively exploited?
CVE-2026-17573 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.6% of all scored CVEs.
What is the CVSS score of CVE-2026-17573?
CVE-2026-17573 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-17573?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-17573, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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