CVE-2026-31401

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-04-03. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: 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:

HID: bpf: prevent buffer overflow in hid_hw_request

right now the returned value is considered to be always valid. However, when playing with HID-BPF, the return value can be arbitrary big, because it's the return value of dispatch_hid_bpf_raw_requests(), which calls the struct_ops and we have no guarantees that the value makes sense.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

April 3, 2026

Last Modified

July 24, 2026

Advisory Details (4)

Auto-updated May 20, 2026
No patch confirmed yet.
generic

HID: bpf: prevent buffer overflow in hid_hw_request - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/eb57dae20fdf6f3069cdc07821fa3bb46de381d7
generic

HID: bpf: prevent buffer overflow in hid_hw_request - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d6efaa50af62fb0790dd1fd4e7e5506b46312510
generic

HID: bpf: prevent buffer overflow in hid_hw_request - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1
generic

HID: bpf: prevent buffer overflow in hid_hw_request - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2b658c1c442ec1cd9eec5ead98d68662c40fe645

Vendor Advisories for CVE-2026-31401(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
linuxKernel @ 6.12.78osv

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 12× in last 7d / 41× 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 119 total refreshes for this CVE.

  1. 2026-07-26 14:54 UTCEPSS rescore
  2. 2026-07-26 14:54 UTCEPSS rescore
  3. 2026-07-26 09:17 UTCEG score recompute
  4. 2026-07-26 09:17 UTCGHSA enrichment
  5. 2026-07-24 14:17 UTCEPSS rescore
  6. 2026-07-23 14:18 UTCEPSS rescore
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  8. 2026-07-23 03:08 UTCEG score recompute
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  19. 2026-07-17 03:24 UTCOSV refresh
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  1. 2026-07-13 22:30 UTCEPSS rescore
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  27. 2026-06-22 14:25 UTCEPSS rescore
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  29. 2026-06-21 14:56 UTCEPSS rescore
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  31. 2026-06-21 01:59 UTCEPSS rescore
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  40. 2026-06-12 23:12 UTCEPSS rescore
  41. 2026-06-11 21:59 UTCGHSA enrichment
  42. 2026-06-11 14:00 UTCEPSS rescore
  43. 2026-06-10 22:18 UTCEPSS rescore
  44. 2026-06-10 15:27 UTCGHSA enrichment
  45. 2026-06-10 13:22 UTCEPSS rescore
  46. 2026-06-10 02:56 UTCGHSA enrichment
  47. 2026-06-09 14:28 UTCGHSA enrichment
  48. 2026-06-08 14:17 UTCEPSS rescore
  49. 2026-06-08 14:17 UTCEPSS rescore
  50. 2026-06-08 12:31 UTCGHSA enrichment
  51. 2026-06-07 23:19 UTCGHSA enrichment
  52. 2026-06-07 15:25 UTCEPSS rescore
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  54. 2026-06-07 15:25 UTCEPSS rescore
  55. 2026-06-07 10:51 UTCGHSA enrichment
  56. 2026-06-06 13:47 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2026-31401?
CVE-2026-31401 is a high vulnerability published on April 3, 2026. In the Linux kernel, the following vulnerability has been resolved: HID: bpf: prevent buffer overflow in hidhwrequest right now the returned value is considered to be always valid. However, when playing with HID-BPF, the return value can be arbitrary big, because it's the return value of…
When was CVE-2026-31401 disclosed?
CVE-2026-31401 was first published in the National Vulnerability Database on April 3, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31401 actively exploited?
CVE-2026-31401 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 96.6% of all scored CVEs.
What is the CVSS score of CVE-2026-31401?
CVE-2026-31401 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-31401?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31401, 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

Explore the affected products and dependency analysis for CVE-2026-31401

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