CVE-2026-64255

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-24. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released 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

A fix is available — apply it.

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

wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers

Three BA session handlers use ffs(ba_data->sta_mask) - 1 to derive a station ID without checking that sta_mask is non-zero. When sta_mask is zero, ffs() returns 0 and the subtraction wraps to 0xFFFFFFFF, causing an out-of-bounds access on fw_id_to_link_sta[].

Add WARN_ON_ONCE(!ba_data->sta_mask) guards before each ffs() call, consistent with the existing check in iwl_mld_ampdu_rx_start().

CVSS v3
8.8
EG Score
8.8(medium)
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
13%
KEV
Not listed

Published

July 24, 2026

Last Modified

August 17, 2026

Advisory Details (3)

Auto-updated Jul 27, 2026
No patch confirmed yet.
generic

wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f056fc2b927448d37eca6b6cacc3d1b0f67b20d2
generic

wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fe7f339f63c9dc4ca546ed7ac38ba4bb3a99dcfc
generic

wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1de92789ce31e46fa7e7d8e89c90b19cdb1c103b

Vendor Advisories for CVE-2026-64255(4)

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

Patch Availability(7)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1018.18~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1019.19) @ resolute2026-09-18ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1013.13) @ resolute2026-09-18ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-31.31) @ resolute2026-09-18ubuntu
redhatkernel-0:5.14.0-687.47.1.el9_82026-09-14redhat
redhatkernel-0:6.12.0-211.53.1.el10_22026-09-08redhat

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

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (174 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (156 versions)7.1.3-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(5)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 30× in last 7d / 106× 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.

Showing the most recent 100 of 219 total refreshes for this CVE.

  1. 2026-09-18 22:28 UTCEG score recompute
  2. 2026-09-18 22:28 UTCVendor advisory
  3. 2026-09-18 22:28 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 02:59 UTCEG score recompute
  6. 2026-09-18 02:59 UTCVendor advisory
  7. 2026-09-18 02:59 UTCGHSA enrichment
  8. 2026-09-17 01:58 UTCEG score recompute
  9. 2026-09-17 01:58 UTCVendor advisory
  10. 2026-09-17 01:58 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 06:39 UTCEG score recompute
  13. 2026-09-16 06:39 UTCVendor advisory
  14. 2026-09-16 06:39 UTCGHSA enrichment
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-15 09:36 UTCEG score recompute
  17. 2026-09-15 09:36 UTCVendor advisory
  18. 2026-09-15 09:36 UTCGHSA enrichment
  19. 2026-09-14 11:18 UTCVendor advisory
  20. 2026-09-14 11:18 UTCGHSA enrichment
  21. 2026-09-14 00:13 UTCEG score recompute
  22. 2026-09-14 00:13 UTCVendor advisory
  23. 2026-09-14 00:13 UTCGHSA enrichment
  24. 2026-09-13 13:06 UTCVendor advisory
  25. 2026-09-13 13:06 UTCGHSA enrichment
Show 75 more
  1. 2026-09-13 01:59 UTCEG score recompute
  2. 2026-09-13 01:59 UTCVendor advisory
  3. 2026-09-13 01:59 UTCGHSA enrichment
  4. 2026-09-12 14:46 UTCVendor advisory
  5. 2026-09-12 14:46 UTCGHSA enrichment
  6. 2026-09-12 03:41 UTCVendor advisory
  7. 2026-09-12 03:41 UTCGHSA enrichment
  8. 2026-09-11 16:36 UTCEG score recompute
  9. 2026-09-11 16:36 UTCVendor advisory
  10. 2026-09-11 16:36 UTCGHSA enrichment
  11. 2026-09-11 14:53 UTCEPSS rescore
  12. 2026-09-11 09:37 UTCEPSS rescore
  13. 2026-09-11 02:40 UTCVendor advisory
  14. 2026-09-11 02:40 UTCGHSA enrichment
  15. 2026-09-10 13:36 UTCEG score recompute
  16. 2026-09-10 13:36 UTCVendor advisory
  17. 2026-09-10 13:36 UTCGHSA enrichment
  18. 2026-09-09 08:47 UTCEG score recompute
  19. 2026-09-09 08:47 UTCVendor advisory
  20. 2026-09-09 08:46 UTCGHSA enrichment
  21. 2026-09-08 22:01 UTCEPSS rescore
  22. 2026-09-07 21:24 UTCEG score recompute
  23. 2026-09-07 21:24 UTCVendor advisory
  24. 2026-09-07 21:24 UTCGHSA enrichment
  25. 2026-09-07 16:01 UTCEPSS rescore
  26. 2026-09-06 19:15 UTCEG score recompute
  27. 2026-09-06 19:15 UTCGHSA enrichment
  28. 2026-09-06 13:47 UTCEPSS rescore
  29. 2026-09-06 08:10 UTCGHSA enrichment
  30. 2026-09-05 19:23 UTCEG score recompute
  31. 2026-09-05 19:23 UTCGHSA enrichment
  32. 2026-09-05 15:31 UTCEPSS rescore
  33. 2026-09-05 06:53 UTCEG score recompute
  34. 2026-09-05 06:53 UTCGHSA enrichment
  35. 2026-09-04 12:51 UTCEG score recompute
  36. 2026-09-04 12:51 UTCGHSA enrichment
  37. 2026-09-04 05:07 UTCEPSS rescore
  38. 2026-09-02 14:12 UTCEPSS rescore
  39. 2026-09-01 23:16 UTCEG score recompute
  40. 2026-09-01 23:16 UTCGHSA enrichment
  41. 2026-09-01 13:54 UTCEPSS rescore
  42. 2026-09-01 04:40 UTCEPSS rescore
  43. 2026-08-30 22:26 UTCEG score recompute
  44. 2026-08-30 22:26 UTCGHSA enrichment
  45. 2026-08-30 19:17 UTCEPSS rescore
  46. 2026-08-30 11:22 UTCEG score recompute
  47. 2026-08-30 11:22 UTCGHSA enrichment
  48. 2026-08-30 01:22 UTCEPSS rescore
  49. 2026-08-30 00:17 UTCEG score recompute
  50. 2026-08-30 00:17 UTCGHSA enrichment
  51. 2026-08-28 21:42 UTCEPSS rescore
  52. 2026-08-27 21:06 UTCEG score recompute
  53. 2026-08-27 21:06 UTCGHSA enrichment
  54. 2026-08-27 10:00 UTCGHSA enrichment
  55. 2026-08-26 19:52 UTCEG score recompute
  56. 2026-08-26 19:52 UTCGHSA enrichment
  57. 2026-08-26 14:47 UTCEPSS rescore
  58. 2026-08-26 07:52 UTCGHSA enrichment
  59. 2026-08-25 20:47 UTCEG score recompute
  60. 2026-08-25 20:47 UTCGHSA enrichment
  61. 2026-08-25 13:49 UTCEPSS rescore
  62. 2026-08-25 09:33 UTCGHSA enrichment
  63. 2026-08-24 22:29 UTCEG score recompute
  64. 2026-08-24 22:29 UTCGHSA enrichment
  65. 2026-08-24 11:24 UTCEG score recompute
  66. 2026-08-24 11:24 UTCGHSA enrichment
  67. 2026-08-24 00:19 UTCEG score recompute
  68. 2026-08-24 00:19 UTCGHSA enrichment
  69. 2026-08-23 13:14 UTCGHSA enrichment
  70. 2026-08-23 01:51 UTCEG score recompute
  71. 2026-08-23 01:51 UTCGHSA enrichment
  72. 2026-08-23 00:19 UTCEPSS rescore
  73. 2026-08-22 14:47 UTCGHSA enrichment
  74. 2026-08-22 03:42 UTCEG score recompute
  75. 2026-08-22 03:42 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-64255?
CVE-2026-64255 is a high vulnerability published on July 24, 2026. In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers Three BA session handlers use ffs(badata->stamask) - 1 to derive a station ID without checking that stamask is non-zero. When stamask is zero, ffs() returns…
When was CVE-2026-64255 disclosed?
CVE-2026-64255 was first published in the National Vulnerability Database on July 24, 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-2026-64255 actively exploited?
CVE-2026-64255 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 86.8% of all scored CVEs.
What is the CVSS score of CVE-2026-64255?
CVE-2026-64255 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-64255?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64255, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-64255

Explore →

Is Your Infrastructure Affected by CVE-2026-64255?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs