CVE-2026-100074

MEDIUMNVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-09-25. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 5 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.5Exploit: None knownExposed services: Not assessed

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

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

bpf: Mark bpf_refcount field as unique

BPF_REFCOUNT is not marked as a unique field, while it should be. Fix this oversight.

CVSS v3
5.5
EG Score
5.5MEDIUMhigh confidence
EG Risk
29
EG Risk 29/100CISA SSVC

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%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 25, 2026

Last Modified

October 2, 2026

Advisory Details (3)

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

bpf: Mark bpf_refcount field as unique - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e42cede6f90177f4f92f80d3de18f628e61d2087
generic

bpf: Mark bpf_refcount field as unique - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/641f814965d733936ca3618d4d5a12a8fa9be00e
generic

bpf: Mark bpf_refcount field as unique - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/61e655391cb19c31f94ecd4354f624c81ce4cf75

Vendor Advisories for CVE-2026-100074(2)

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

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (181 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (178 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
—

Data Freshness Timeline

(refreshed 21× in last 7d / 25× 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.

  1. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-04 14:45 UTCVendor advisory
  3. 2026-10-04 14:45 UTCGHSA enrichment
  4. 2026-10-03 15:08 UTCEG score recompute
  5. 2026-10-03 15:08 UTCVendor advisory
  6. 2026-10-03 15:08 UTCGHSA enrichment
  7. 2026-10-03 14:25 UTCEPSS rescore
  8. 2026-10-02 15:23 UTCEG score recompute▲ 5.50
  9. 2026-10-02 15:23 UTCVendor advisory
  10. 2026-10-02 15:23 UTCGHSA enrichment
  11. 2026-10-02 15:22 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  12. 2026-10-01 19:49 UTCEPSS rescore
  13. 2026-09-30 15:02 UTCEPSS rescore
  14. 2026-09-30 14:32 UTCEG score recompute
  15. 2026-09-30 14:32 UTCVendor advisory
  16. 2026-09-30 14:32 UTCGHSA enrichment
  17. 2026-09-29 15:20 UTCEPSS rescore
  18. 2026-09-28 13:50 UTCEPSS rescore
  19. 2026-09-28 10:51 UTCEG score recompute
  20. 2026-09-28 10:51 UTCVendor advisory
  21. 2026-09-28 10:51 UTCGHSA enrichment
  22. 2026-09-26 15:58 UTCEPSS rescore
  23. 2026-09-25 14:20 UTCNVD update
  24. 2026-09-25 13:19 UTCEG score recompute
  25. 2026-09-25 13:19 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-100074?
CVE-2026-100074 is a medium vulnerability published on September 25, 2026. In the Linux kernel, the following vulnerability has been resolved: bpf: Mark bpf_refcount field as unique BPF_REFCOUNT is not marked as a unique field, while it should be. Fix this oversight.
When was CVE-2026-100074 disclosed?
CVE-2026-100074 was first published on September 25, 2026, with the most recent update on October 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-100074 actively exploited?
CVE-2026-100074 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100074?
CVE-2026-100074 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-100074?
No fix for CVE-2026-100074 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-100074 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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