Vulnerability-Lookup

CVE-2026-64255 (GCVE-0-2026-64255)

Vulnerability from cvelistv5 – Published: 2026-07-24 15:31 – Updated: 2026-08-17 04:52

Title

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

Summary

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().

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/1de92789ce31e46fa…
https://git.kernel.org/stable/c/fe7f339f63c9dc4ca…
https://git.kernel.org/stable/c/f056fc2b927448d37…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 9aa3856d9b6f3f8bf085b5bbb5f3703578bf452b , < 1de92789ce31e46fa7e7d8e89c90b19cdb1c103b (git) Affected: 9aa3856d9b6f3f8bf085b5bbb5f3703578bf452b , < fe7f339f63c9dc4ca546ed7ac38ba4bb3a99dcfc (git) Affected: 9aa3856d9b6f3f8bf085b5bbb5f3703578bf452b , < f056fc2b927448d37eca6b6cacc3d1b0f67b20d2 (git)	guessed
Linux	Linux	Affected: 6.4 Unaffected: 0 , < 6.4 (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

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{
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          "programFiles": [
            "drivers/net/wireless/intel/iwlwifi/mld/agg.c"
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          "url": "https://git.kernel.org/stable/c/f056fc2b927448d37eca6b6cacc3d1b0f67b20d2"
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      "title": "wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers",
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    "datePublished": "2026-07-24T15:31:22.870Z",
    "dateReserved": "2026-07-19T15:36:31.773Z",
    "dateUpdated": "2026-08-17T04:52:07.539Z",
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      "title": "kernel: wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers",
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      "product_status:recommended": "46",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64255",
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      "version": "7"
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}

WID-SEC-W-2026-2527

Vulnerability from csaf_certbund - Published: 2026-07-26 22:00 - Updated: 2026-09-10 22:00

Summary

Linux Kernel: Mehrere Schwachstellen

Severity

Mittel

Scope

330 vulnerabilities in this advisory, including CVE-2026-64255.

CVE-2026-64255

Known affected: 9 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-64255 (GCVE-0-2026-64255)

WID-SEC-W-2026-2527

Tags

Sightings

Nomenclature