CVE-2026-64570

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-05. a secondary CVSS source baseline 7.8; sources differ by 0.0.

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

wifi: mac80211: fix fils_discovery double free on alloc failure

ieee80211_set_fils_discovery() calls kfree_rcu() on the old template before allocating the replacement. If the kzalloc() then fails, it returns -ENOMEM while link->u.ap.fils_discovery still points at the object already queued for freeing. A later update or AP teardown (ieee80211_stop_ap()) re-queues that same rcu_head; the second free is caught by KASAN when the RCU sheaf is processed in softirq:

BUG: KASAN: double-free in rcu_free_sheaf (mm/slub.c:5850) Free of addr ffff88800c065280 by task swapper/0/0 ... __rcu_free_sheaf_prepare (mm/slub.c:2634 mm/slub.c:2940) rcu_free_sheaf (mm/slub.c:5850) rcu_core (kernel/rcu/tree.c:2617 kernel/rcu/tree.c:2869) handle_softirqs (kernel/softirq.c:622) The buggy address belongs to the cache kmalloc-96 of size 96

Queue the old object for kfree_rcu() only after the new one is published, matching ieee80211_set_probe_resp() and ieee80211_set_s1g_short_beacon().

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
5%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 17, 2026

Advisory Details (4)

Auto-updated Aug 8, 2026
No patch confirmed yet.
generic

wifi: mac80211: fix fils_discovery double free on alloc failure - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e2c55079155a953db669ca1986a985fa286bad95
generic

wifi: mac80211: fix fils_discovery double free on alloc failure - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5baaa1042f71dd4b8e418f2cdd516808702d229b
generic

wifi: mac80211: fix fils_discovery double free on alloc failure - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/286e52a799fa158bdbd77da1426c4d93f9a6e7ad
generic

wifi: mac80211: fix fils_discovery double free on alloc failure - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1981fba71797ec95e6755fb882cad88899a2a84f

Vendor Advisories for CVE-2026-64570(1)

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 rangeFixed inDependents
linux6.12.100-1 ... 6.12.96-1 (32 versions)6.12.101-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (158 versions)7.1.6-1—

Data Freshness Timeline

(refreshed 31× in last 7d / 64× 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 06:32 UTCEG score recompute
  2. 2026-08-21 06:32 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 18:39 UTCGHSA enrichment
  5. 2026-08-20 06:47 UTCGHSA enrichment
  6. 2026-08-19 18:53 UTCEG score recompute
  7. 2026-08-19 18:53 UTCGHSA enrichment
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-19 06:24 UTCGHSA enrichment
  10. 2026-08-18 18:15 UTCEG score recompute
  11. 2026-08-18 18:15 UTCGHSA enrichment
  12. 2026-08-18 13:48 UTCEPSS rescore
  13. 2026-08-18 05:30 UTCGHSA enrichment
  14. 2026-08-17 17:37 UTCEG score recompute
  15. 2026-08-17 17:37 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 05:42 UTCEG score recompute
  18. 2026-08-17 05:42 UTCGHSA enrichment
  19. 2026-08-17 05:14 UTCEG score recompute
  20. 2026-08-17 05:14 UTCGHSA enrichment
  21. 2026-08-17 01:16 UTCEG score recompute
  22. 2026-08-17 01:16 UTCGHSA enrichment
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 13:23 UTCEG score recompute
  25. 2026-08-16 13:23 UTCGHSA enrichment
Show 39 more
  1. 2026-08-16 01:30 UTCGHSA enrichment
  2. 2026-08-15 13:37 UTCGHSA enrichment
  3. 2026-08-15 01:44 UTCEG score recompute
  4. 2026-08-15 01:44 UTCGHSA enrichment
  5. 2026-08-15 01:30 UTCEPSS rescore
  6. 2026-08-14 13:51 UTCGHSA enrichment
  7. 2026-08-14 01:58 UTCEG score recompute
  8. 2026-08-14 01:58 UTCGHSA enrichment
  9. 2026-08-13 22:00 UTCEPSS rescore
  10. 2026-08-13 14:05 UTCGHSA enrichment
  11. 2026-08-13 02:12 UTCGHSA enrichment
  12. 2026-08-12 14:20 UTCEG score recompute
  13. 2026-08-12 14:19 UTCGHSA enrichment
  14. 2026-08-12 13:51 UTCEPSS rescore
  15. 2026-08-12 02:26 UTCGHSA enrichment
  16. 2026-08-11 14:33 UTCEG score recompute
  17. 2026-08-11 14:33 UTCGHSA enrichment
  18. 2026-08-11 02:40 UTCEG score recompute
  19. 2026-08-11 02:40 UTCGHSA enrichment
  20. 2026-08-11 00:00 UTCEPSS rescore
  21. 2026-08-10 14:48 UTCGHSA enrichment
  22. 2026-08-10 02:55 UTCGHSA enrichment
  23. 2026-08-09 15:02 UTCEG score recompute
  24. 2026-08-09 15:02 UTCGHSA enrichment
  25. 2026-08-09 13:47 UTCEPSS rescore
  26. 2026-08-09 03:10 UTCEG score recompute
  27. 2026-08-09 03:10 UTCGHSA enrichment
  28. 2026-08-08 16:37 UTCEPSS rescore
  29. 2026-08-08 15:17 UTCEG score recompute▲ 7.80
  30. 2026-08-08 15:17 UTCGHSA enrichment
  31. 2026-08-08 15:16 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  32. 2026-08-08 13:11 UTCEG score recompute
  33. 2026-08-08 13:11 UTCGHSA enrichment
  34. 2026-08-06 13:47 UTCEPSS rescore
  35. 2026-08-05 19:17 UTCEPSS rescore
  36. 2026-08-05 19:17 UTCEPSS rescore
  37. 2026-08-05 08:20 UTCNVD update
  38. 2026-08-05 08:12 UTCEG score recompute
  39. 2026-08-05 08:10 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-64570?
CVE-2026-64570 is a high vulnerability published on August 5, 2026. In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix fils_discovery double free on alloc failure ieee80211setfilsdiscovery() calls kfreercu() on the old template before allocating the replacement. If the kzalloc() then fails, it returns -ENOMEM while…
When was CVE-2026-64570 disclosed?
CVE-2026-64570 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64570 actively exploited?
CVE-2026-64570 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 95.1% of all scored CVEs.
What is the CVSS score of CVE-2026-64570?
CVE-2026-64570 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-64570?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64570, 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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