CVE-2026-23040

UNRATEDCVSS · not yet scored
—
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

wifi: mac80211_hwsim: fix typo in frequency notification

The NAN notification is for 5745 MHz which corresponds to channel 149 and not 5475 which is not actually a valid channel. This could result in a NULL pointer dereference in cfg80211_next_nan_dw_notif.

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

February 4, 2026

Last Modified

June 17, 2026

Vendor Advisories for CVE-2026-23040(2)

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

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-0:6.12.0-211.7.1.el10_22026-05-19redhat
redhatkernel-0:5.14.0-687.5.1.el9_82026-05-19redhat
linuxKernel @ 6.18.6 (fixes >=6.18.0)—osv

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.

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.18~rc7-1~exp1 (97 versions)
  • every version up to 6.18.8-1: fixed in 6.18.8-1
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Data Freshness Timeline

(refreshed 11× in last 7d / 29× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 92 of 192 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 8 repeat rows among the latest 100 are merged into the row they repeat. The 100 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  2. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  3. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  4. 2026-10-12 16:21 UTCEG score recompute
  5. 2026-10-11 20:03 UTCEG score recompute
  6. 2026-10-11 17:16 UTCEG score recompute
  7. 2026-10-11 14:48 UTCEG score recompute
  8. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  13. 2026-10-07 10:05 UTCOSV refresh
  14. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  16. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  17. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  18. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  19. 2026-09-29 15:21 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  20. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  21. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  23. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  24. 2026-09-24 14:03 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  25. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 4th percentile
Show 67 more
  1. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  2. 2026-09-17 15:50 UTCOSV refresh
  3. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  4. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  5. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  6. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  7. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  8. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  9. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  10. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  11. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  12. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  13. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  14. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  15. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  16. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  17. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  18. 2026-08-29 16:13 UTCOSV refresh
  19. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  20. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  21. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  22. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  23. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  24. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  25. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  26. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  27. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  28. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  29. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  30. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  31. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  32. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  33. 2026-08-13 03:35 UTCVendor advisory
  34. 2026-08-13 03:35 UTCGHSA enrichmentGHSA-4mqx-ggc6-9qj3
  35. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  36. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  37. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  38. 2026-08-09 15:55 UTCVendor advisory
  39. 2026-08-09 15:55 UTCGHSA enrichmentGHSA-4mqx-ggc6-9qj3
  40. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  41. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  42. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  43. 2026-08-06 04:24 UTCVendor advisory
  44. 2026-08-06 04:24 UTCGHSA enrichmentGHSA-4mqx-ggc6-9qj3
  45. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  46. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  47. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  48. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  49. 2026-08-02 21:29 UTCEG score recompute
  50. 2026-08-02 21:29 UTCVendor advisory
  51. 2026-08-02 21:29 UTCGHSA enrichmentGHSA-4mqx-ggc6-9qj3
  52. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  53. 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  54. 2026-07-30 23:50 UTCOSV refresh
  55. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  56. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  57. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  58. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  59. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  60. 2026-07-23 03:06 UTCEG score recompute
  61. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  62. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  63. 2026-07-20 17:08 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  64. 2026-07-19 14:31 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  65. 2026-07-16 17:03 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  66. 2026-07-15 16:57 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  67. 2026-07-15 02:00 UTCEPSS rescoreEPSS 0.1% · 4th percentile

Frequently asked(4)

What is CVE-2026-23040?
CVE-2026-23040 is a vulnerability whose severity is not yet rated; its CVE record was published on February 4, 2026. In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: fix typo in frequency notification The NAN notification is for 5745 MHz which corresponds to channel 149 and not 5475 which is not actually a valid channel. This could result in a NULL pointer dereference in…
When was the CVE record for CVE-2026-23040 published?
The CVE record for CVE-2026-23040 was published on February 4, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
Is CVE-2026-23040 actively exploited?
CVE-2026-23040 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-23040?
A fix for CVE-2026-23040 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-23040 are linked in the Vendor Advisories panel on this page.

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