# CVE-2026-10664: Out-of-bounds write in nRF70 Wi-Fi driver power-save event handler (unbounded TWT flow count)

Status: published. Published: 2026-07-12. Updated: 2026-11-04.

The nRF70 Wi-Fi driver's power-save event handler nrf_wifi_event_proc_get_power_save_info() in drivers/wifi/nrf_wifi/src/wifi_mgmt.c copied TWT (Target Wake Time) flow entries from an nrf_wifi_umac_event_power_save_info event into the fixed-size twt_flows[WIFI_MAX_TWT_FLOWS] (8-element) array of a caller-supplied struct wifi_ps_config, looping over event-provided num_twt_flows without validating it against WIFI_MAX_TWT_FLOWS or checking event_len. When num_twt_flows exceeds 8, the handler writes past the destination array (which is typically on the caller's stack, e.g. the wifi ps shell command) -- an out-of-bounds write of ~40-byte TWT entries -- and reads twt_flow_info[i] past the event buffer. The event is delivered by the nRF70 co-processor firmware in response to a host-initiated power-save GET, so reaching the overflow requires the firmware to emit a malformed or out-of-range event; the trust boundary is host-to-trusted-coprocessor rather than a direct remote-AP write, with over-the-air influence on the flow count being indirect and bounded by the 3-bit TWT flow-id space. Affected: builds with CONFIG_NRF70_STA_MODE on releases through v4.4.0. The fix rejects events with num_twt_flows > WIFI_MAX_TWT_FLOWS or with event_len shorter than the claimed entries, and adds a NULL check on the caller buffer.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: zephyr) — https://github.com/zephyrproject-rtos/zephyr/commit/a2c4324acd50a5f92e492e6e460e6297af826148
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: vulnerabilities@zephyrproject.org) — https://github.com/zephyrproject-rtos/zephyr/commit/a2c4324acd50a5f92e492e6e460e6297af826148
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: vulnerabilities@zephyrproject.org) — https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3r6j-pm38-r43m
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: 134c704f-9b21-4f2e-91b3-4a467353bcc0) — https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3r6j-pm38-r43m

## Affected products and versions

- zephyrproject / zephyr (zephyr): ≥ 4.4.0; < 4.6.0 (affected, semver). Source: CNA: zephyr

## NVD configuration conditions

Affected CPE matches depend on the following AND/OR and negation conditions:

```json
[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "4.5.0",
            "versionStartIncluding": "4.0.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]
```

## Severity and prioritization

- CVSS 3.1: 5 (medium); CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L; source: CNA: zephyr

- CVSS 3.1: 5 (medium); CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L; source: NVD: vulnerabilities@zephyrproject.org

- CISA KEV: No listing in collected sources

- EPSS: 0.22% as of 2026-11-03; percentile 12.93%

- SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-787

## Exploit evidence

- exploit: https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3r6j-pm38-r43m (ADP: CISA-ADP)
- exploit: https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3r6j-pm38-r43m (vulnerabilities@zephyrproject.org)
- exploit: https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3r6j-pm38-r43m (134c704f-9b21-4f2e-91b3-4a467353bcc0)

## References

- https://github.com/zephyrproject-rtos/zephyr/commit/a2c4324acd50a5f92e492e6e460e6297af826148 (CNA: zephyr; patch)

- https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3r6j-pm38-r43m (CNA: zephyr)

- https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3r6j-pm38-r43m (ADP: CISA-ADP; exploit)

- https://github.com/zephyrproject-rtos/zephyr/commit/a2c4324acd50a5f92e492e6e460e6297af826148 (vulnerabilities@zephyrproject.org; Patch)

- https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3r6j-pm38-r43m (vulnerabilities@zephyrproject.org; Exploit, Mitigation, Patch, Vendor Advisory)

- https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3r6j-pm38-r43m (134c704f-9b21-4f2e-91b3-4a467353bcc0; Exploit, Mitigation, Patch, Vendor Advisory)

## Provenance

- CNA: zephyr: https://www.cve.org/CVERecord?id=CVE-2026-10664; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-10664; retrieved 2026-11-04; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-10664; retrieved 2026-11-04; source updated Not reported

Revision: 41c92bd085e131cde33ff6bc84779944b22d75c96414749a6d7b7ba0a260946e

Canonical: https://y2.dev/cve/CVE-2026-10664

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