CVE-2026-74661

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-22. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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:

mac802154: fix netdev use-after-free in beacon worker

mac802154_beacon_worker() reads local->beacon_req under RCU and derives the sub-interface from the request, but then drops the RCU read lock and continues to use both sdata and the embedded wpan_dev.

mac802154_stop_beacons_locked() cancels only pending beacon work, clears local->beacon_req and frees the request. A beacon worker that is already running can therefore continue after interface teardown and dereference the freed netdev private area.

The scan worker already pins the netdev before leaving RCU. Apply the same lifetime rule to the beacon worker: take a netdev reference while the request is still protected by RCU, and release it on all paths that continue after the reference is acquired.

CVSS v3
7.8
EG Score
7.8(high)
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
2%
KEV
Not listed

Published

August 22, 2026

Last Modified

August 25, 2026

Advisory Details (5)

Auto-updated Aug 25, 2026
No patch confirmed yet.
generic

mac802154: fix netdev use-after-free in beacon worker - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5f26a690e8efa54315e4922368daf54e0b8f5515
generic

mac802154: fix netdev use-after-free in beacon worker - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9d067e581597c462c51fee8a30b51bc48a68c4e1
generic

mac802154: fix netdev use-after-free in beacon worker - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e6cd416a899edc912b428c4ba399bd73f516cb31
generic

mac802154: fix netdev use-after-free in beacon worker - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e5fb0e03bc7f45508c182a427357bf6b389a9033
generic

mac802154: fix netdev use-after-free in beacon worker - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fe820dcc1d8ff77783a9d2bcc93b98c99ac6d517

Vendor Advisories for CVE-2026-74661(1)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 27× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 19:34 UTCGHSA enrichment
  3. 2026-08-29 07:30 UTCEG score recompute
  4. 2026-08-29 07:29 UTCGHSA enrichment
  5. 2026-08-28 21:42 UTCEPSS rescore
  6. 2026-08-28 19:26 UTCGHSA enrichment
  7. 2026-08-28 06:58 UTCGHSA enrichment
  8. 2026-08-27 18:51 UTCEG score recompute
  9. 2026-08-27 18:51 UTCGHSA enrichment
  10. 2026-08-27 14:25 UTCEPSS rescore
  11. 2026-08-27 06:44 UTCGHSA enrichment
  12. 2026-08-26 18:40 UTCEG score recompute
  13. 2026-08-26 18:40 UTCGHSA enrichment
  14. 2026-08-26 14:47 UTCEPSS rescore
  15. 2026-08-26 06:36 UTCGHSA enrichment
  16. 2026-08-25 18:32 UTCEG score recompute
  17. 2026-08-25 18:32 UTCGHSA enrichment
  18. 2026-08-25 13:49 UTCEPSS rescore
  19. 2026-08-25 06:29 UTCEG score recompute
  20. 2026-08-25 06:29 UTCGHSA enrichment
  21. 2026-08-25 05:56 UTCEG score recompute▲ 7.80
  22. 2026-08-25 05:56 UTCGHSA enrichment
  23. 2026-08-25 05:55 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  24. 2026-08-24 14:18 UTCEPSS rescore
  25. 2026-08-22 16:24 UTCNVD update
Show 2 more
  1. 2026-08-22 15:41 UTCEG score recompute
  2. 2026-08-22 15:35 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74661?
CVE-2026-74661 is a high vulnerability published on August 22, 2026. In the Linux kernel, the following vulnerability has been resolved: mac802154: fix netdev use-after-free in beacon worker mac802154beaconworker() reads local->beacon_req under RCU and derives the sub-interface from the request, but then drops the RCU read lock and continues to use both sdata and…
When was CVE-2026-74661 disclosed?
CVE-2026-74661 was first published in the National Vulnerability Database on August 22, 2026, with the most recent update on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74661 actively exploited?
CVE-2026-74661 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 97.5% of all scored CVEs.
What is the CVSS score of CVE-2026-74661?
CVE-2026-74661 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-74661?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74661, 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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