CVE-2026-71225

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-08-05. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — Patch released this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in libkcapi. When performing one-shot symmetric cipher operations on large inputs (over 64 KiB) in stateful modes such as Counter (CTR) or Cipher Block Chaining (CBC), the library improperly reuses the Initialization Vector (IV) for each internal data chunk. A remote attacker could potentially exploit this by making an application that uses libkcapi process specially crafted large inputs. This can lead to a significant weakening of data confidentiality, as the repeated IV use can expose relationships in encrypted plaintext, and may also affect data integrity by causing incorrect cryptographic processing.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

August 5, 2026

Last Modified

September 14, 2026

Advisory Details (2)

Auto-updated Aug 5, 2026
Patch available. Sources: redhat.
redhat

2462011 – (CVE-2026-71225) CVE-2026-71225 libkcapi: IV reuse in libkcapi one-shot symmetric cipher chunking causes cipher state reset across chunk boundaries

https://bugzilla.redhat.com/show_bug.cgi?id=2462011
redhat Patch Available

CVE-2026-71225 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-71225

Vendor Advisories for CVE-2026-71225(3)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatlibkcapi-0:1.5.1-1.el10_22026-09-14redhat
redhatlibkcapi-0:1.4.0-3.el8_102026-09-14redhat
redhatlibkcapi-0:1.4.0-3.el9_82026-09-14redhat
redhatlibkcapi-main-1.5.1-0.1.hum12026-08-19redhat

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

(8 across 8 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
libkcapi—1.5.1-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
libkcapi—1.5.1-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
libkcapi—1.5.1-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
libkcapi—1.5.1-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libkcapi1.2.1-1 ... 1.4.0-1 (6 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libkcapi1.4.0-1——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libkcapi1.4.0-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libkcapi1.4.0-1——

Weakness Classification(1)

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

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 29× in last 7d / 110× 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 163 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-71225?
CVE-2026-71225 is a medium vulnerability published on August 5, 2026. A flaw was found in libkcapi. When performing one-shot symmetric cipher operations on large inputs (over 64 KiB) in stateful modes such as Counter (CTR) or Cipher Block Chaining (CBC), the library improperly reuses the Initialization Vector (IV) for each internal data chunk. A remote attacker could…
When was CVE-2026-71225 disclosed?
CVE-2026-71225 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71225 actively exploited?
CVE-2026-71225 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 73.7% of all scored CVEs.
What is the CVSS score of CVE-2026-71225?
CVE-2026-71225 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-71225?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71225, 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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