CVE-2025-39990

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-10-15. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 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:

bpf: Check the helper function is valid in get_helper_proto

kernel test robot reported verifier bug [1] where the helper func pointer could be NULL due to disabled config option.

As Alexei suggested we could check on that in get_helper_proto directly. Marking tail_call helper func with BPF_PTR_POISON, because it is unused by design.

[1] https://lore.kernel.org/oe-lkp/[email protected]

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
4%
KEV
Not listed

Published

October 15, 2025

Last Modified

August 5, 2026

Advisory Details (3)

Auto-updated Jul 30, 2026
No patch confirmed yet.
generic

bpf: Check the helper function is valid in get_helper_proto - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e4414b01c1cd9887bbde92f946c1ba94e40d6d64
generic

bpf: Check the helper function is valid in get_helper_proto - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6233715b4b714068d6c831d214a4e8792109875a
generic

bpf: Check the helper function is valid in get_helper_proto - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3d429cb1278e995e22995ef117fa96d223a67e93

Vendor Advisories for CVE-2025-39990(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 @ 6.12.50osv

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.

Data Freshness Timeline

(refreshed 12× in last 7d / 44× 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 137 total refreshes for this CVE.

  1. 2026-08-05 12:54 UTCEG score recompute
  2. 2026-08-05 12:54 UTCGHSA enrichment
  3. 2026-08-04 15:09 UTCEPSS rescore
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  9. 2026-07-30 06:31 UTCEG score recompute 7.80
  10. 2026-07-30 06:31 UTCGHSA enrichment
  11. 2026-07-30 06:18 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  12. 2026-07-30 01:29 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2025-39990?
CVE-2025-39990 is a high vulnerability published on October 15, 2025. In the Linux kernel, the following vulnerability has been resolved: bpf: Check the helper function is valid in gethelperproto kernel test robot reported verifier bug [1] where the helper func pointer could be NULL due to disabled config option. As Alexei suggested we could check on that in…
When was CVE-2025-39990 disclosed?
CVE-2025-39990 was first published in the National Vulnerability Database on October 15, 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-2025-39990 actively exploited?
CVE-2025-39990 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 96.1% of all scored CVEs.
What is the CVSS score of CVE-2025-39990?
CVE-2025-39990 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2025-39990?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-39990, 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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