CVE-2025-39680

HIGHNVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2025-09-05. NVD baseline CVSS 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In the Linux kernel, the following vulnerability has been resolved:

i2c: rtl9300: Fix out-of-bounds bug in rtl9300_i2c_smbus_xfer

The data->block[0] variable comes from user. Without proper check, the variable may be very large to cause an out-of-bounds bug.

Fix this bug by checking the value of data->block[0] first.

  • commit 39244cc75482 ("i2c: ismt: Fix an out-of-bounds bug in
ismt_access()")
  • commit 92fbb6d1296f ("i2c: xgene-slimpro: Fix out-of-bounds bug in
xgene_slimpro_i2c_xfer()")

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

September 5, 2025

Last Modified

August 5, 2026

Advisory Details (2)

Auto-updated Aug 2, 2026
No patch confirmed yet.
generic

i2c: rtl9300: Fix out-of-bounds bug in rtl9300_i2c_smbus_xfer - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/57f312b955938fc4663f430cb57a71f2414f601b
generic

i2c: rtl9300: Fix out-of-bounds bug in rtl9300_i2c_smbus_xfer - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/071e43fcba5ddd9a7813e6cc0aa10299eae41b21

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 6.16.4—osv

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 40× 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 104 total refreshes for this CVE.

  1. 2026-08-07 16:26 UTCEPSS rescore
  2. 2026-08-06 13:46 UTCEPSS rescore
  3. 2026-08-05 12:59 UTCEG score recompute
  4. 2026-08-05 12:58 UTCGHSA enrichment
  5. 2026-08-04 15:09 UTCEPSS rescore
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  9. 2026-07-30 16:27 UTCEPSS rescore
  10. 2026-07-30 06:55 UTCEG score recompute
  11. 2026-07-30 06:55 UTCGHSA enrichment
  12. 2026-07-30 01:29 UTCEPSS rescore
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  18. 2026-07-23 21:11 UTCOSV refresh
  19. 2026-07-23 02:55 UTCEG score recompute
  20. 2026-07-22 14:07 UTCEPSS rescore
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  22. 2026-07-21 15:24 UTCEPSS rescore
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  24. 2026-07-19 14:30 UTCEPSS rescore
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  1. 2026-07-18 10:04 UTCEPSS rescore
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  17. 2026-07-06 16:27 UTCEPSS rescore
  18. 2026-07-06 16:27 UTCEPSS rescore
  19. 2026-07-06 15:11 UTCOSV refresh
  20. 2026-07-05 02:30 UTCEPSS rescore
  21. 2026-07-04 06:30 UTCEPSS rescore
  22. 2026-07-01 15:06 UTCEPSS rescore
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  24. 2026-06-30 23:22 UTCEPSS rescore
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  26. 2026-06-29 14:06 UTCEPSS rescore
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  28. 2026-06-28 14:07 UTCEPSS rescore
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  30. 2026-06-28 04:55 UTCEPSS rescore
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  40. 2026-06-22 14:25 UTCEPSS rescore
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  42. 2026-06-21 14:56 UTCEPSS rescore
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  44. 2026-06-21 01:59 UTCEPSS rescore
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  46. 2026-06-19 19:25 UTCEPSS rescore
  47. 2026-06-19 19:25 UTCEPSS rescore
  48. 2026-06-18 17:52 UTCEPSS rescore
  49. 2026-06-18 17:52 UTCEPSS rescore
  50. 2026-06-18 03:35 UTCOSV refresh
  51. 2026-06-17 17:52 UTCEPSS rescore
  52. 2026-06-16 17:52 UTCEPSS rescore
  53. 2026-06-16 17:52 UTCEPSS rescore
  54. 2026-06-14 23:17 UTCEPSS rescore
  55. 2026-06-13 23:00 UTCEPSS rescore
  56. 2026-06-12 23:11 UTCEPSS rescore
  57. 2026-06-11 14:00 UTCEPSS rescore
  58. 2026-06-10 22:18 UTCEPSS rescore
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  62. 2026-06-07 15:24 UTCEPSS rescore
  63. 2026-06-06 13:47 UTCEPSS rescore
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  65. 2026-06-05 22:46 UTCEPSS rescore
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  69. 2026-06-04 13:12 UTCEPSS rescore
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  72. 2026-06-01 13:51 UTCEPSS rescore
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  74. 2026-05-31 22:30 UTCEPSS rescore
  75. 2026-05-31 22:30 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2025-39680?
CVE-2025-39680 is a high vulnerability published on September 5, 2025. In the Linux kernel, the following vulnerability has been resolved: i2c: rtl9300: Fix out-of-bounds bug in rtl9300i2csmbus_xfer The data->block[0] variable comes from user. Without proper check, the variable may be very large to cause an out-of-bounds bug. Fix this bug by checking the value of…
When was CVE-2025-39680 disclosed?
CVE-2025-39680 was first published in the National Vulnerability Database on September 5, 2025, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-39680 actively exploited?
CVE-2025-39680 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 95.0% of all scored CVEs.
What is the CVSS score of CVE-2025-39680?
CVE-2025-39680 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2025-39680?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-39680, 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.

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