CVE-2026-68192

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-10. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: 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:

wifi: brcmfmac: make release_scratchbuffers idempotent

brcmf_pcie_release_scratchbuffers() frees the shared.scratch and shared.ringupd DMA buffers with dma_free_coherent() but does not clear the pointers afterwards, unlike the sibling release_ringbuffers() which NULLs commonrings/flowrings/idxbuf on release.

Both the bus_reset .reset callback (brcmf_pcie_reset) and brcmf_pcie_remove() call release_scratchbuffers. When reset teardown has run before removal, remove's own teardown would call dma_free_coherent() a second time on the already-freed DMA allocation.

NULL the pointers after free, matching release_ringbuffers(), so a later release observes that the allocation has already been released. This patch makes repeated sequential release safe; the reset-work lifetime is handled separately by the following patch.

This issue was found by an in-house static analysis tool.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 19, 2026

Advisory Details (5)

Auto-updated Aug 14, 2026
No patch confirmed yet.
generic

wifi: brcmfmac: make release_scratchbuffers idempotent - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b7d1d8cb1bdca56aecebacd2896615da0acc126a
generic

wifi: brcmfmac: make release_scratchbuffers idempotent - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5a045c2f0fbf029873d2295178fa0785ade35af0
generic

wifi: brcmfmac: make release_scratchbuffers idempotent - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/538c51e9d124cf656f2dd0c0394a8545efc7102d
generic

wifi: brcmfmac: make release_scratchbuffers idempotent - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0ca80328df23f851c86866720d4977783c919ee6
generic

wifi: brcmfmac: make release_scratchbuffers idempotent - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/044fca8f45ba9ab6ca526163155234cf88287ff5

Vendor Advisories for CVE-2026-68192(2)

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 36× in last 7d / 48× 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. 2026-08-21 05:07 UTCEG score recompute
  2. 2026-08-21 05:07 UTCVendor advisory
  3. 2026-08-21 05:07 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-20 17:14 UTCGHSA enrichment
  6. 2026-08-20 05:18 UTCGHSA enrichment
  7. 2026-08-19 17:25 UTCEG score recompute
  8. 2026-08-19 17:25 UTCGHSA enrichment
  9. 2026-08-19 17:04 UTCEPSS rescore
  10. 2026-08-19 16:55 UTCEG score recompute
  11. 2026-08-19 16:55 UTCGHSA enrichment
  12. 2026-08-19 05:19 UTCGHSA enrichment
  13. 2026-08-18 17:25 UTCEG score recompute
  14. 2026-08-18 17:25 UTCGHSA enrichment
  15. 2026-08-18 13:49 UTCEPSS rescore
  16. 2026-08-18 13:49 UTCEPSS rescore
  17. 2026-08-18 05:27 UTCGHSA enrichment
  18. 2026-08-17 17:31 UTCEG score recompute
  19. 2026-08-17 17:31 UTCGHSA enrichment
  20. 2026-08-17 13:47 UTCEPSS rescore
  21. 2026-08-17 05:38 UTCEG score recompute
  22. 2026-08-17 05:38 UTCGHSA enrichment
  23. 2026-08-17 05:09 UTCEG score recompute
  24. 2026-08-17 05:09 UTCGHSA enrichment
  25. 2026-08-16 22:43 UTCEG score recompute
Show 23 more
  1. 2026-08-16 22:43 UTCGHSA enrichment
  2. 2026-08-16 14:56 UTCEPSS rescore
  3. 2026-08-16 10:51 UTCEG score recompute
  4. 2026-08-16 10:51 UTCGHSA enrichment
  5. 2026-08-15 22:59 UTCGHSA enrichment
  6. 2026-08-15 11:07 UTCEG score recompute
  7. 2026-08-15 11:07 UTCGHSA enrichment
  8. 2026-08-15 01:30 UTCEPSS rescore
  9. 2026-08-14 23:14 UTCGHSA enrichment
  10. 2026-08-14 11:22 UTCEG score recompute
  11. 2026-08-14 11:22 UTCGHSA enrichment
  12. 2026-08-13 23:30 UTCEG score recompute
  13. 2026-08-13 23:30 UTCGHSA enrichment
  14. 2026-08-13 22:45 UTCEG score recompute▲ 8.80
  15. 2026-08-13 22:45 UTCGHSA enrichment
  16. 2026-08-13 22:44 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  17. 2026-08-13 22:00 UTCEPSS rescore
  18. 2026-08-13 08:54 UTCEG score recompute
  19. 2026-08-13 08:54 UTCGHSA enrichment
  20. 2026-08-12 13:51 UTCEPSS rescore
  21. 2026-08-10 13:24 UTCNVD update
  22. 2026-08-10 12:20 UTCEG score recompute
  23. 2026-08-10 12:17 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-68192?
CVE-2026-68192 is a high vulnerability published on August 10, 2026. In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: make release_scratchbuffers idempotent brcmfpcierelease_scratchbuffers() frees the shared.scratch and shared.ringupd DMA buffers with dmafreecoherent() but does not clear the pointers afterwards, unlike the sibling…
When was CVE-2026-68192 disclosed?
CVE-2026-68192 was first published in the National Vulnerability Database on August 10, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-68192 actively exploited?
CVE-2026-68192 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 65.4% of all scored CVEs.
What is the CVSS score of CVE-2026-68192?
CVE-2026-68192 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-68192?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68192, 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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