CVE-2026-64176

Wireless firmware crash via incorrect TX rate conversion

Published Jul 19, 2026 · Updated Jul 19, 2026

Denial of service in the Linux kernel iwlwifi MVM driver allows physically proximate attackers to crash affected Intel wireless firmware. iwl_mvm_mac80211_idx_to_hwrate() returns a legacy PLCP value to ordinary TX_CMD construction instead of the rate index expected by later firmware-format conversion. Reachability requires an older iwlmvm device such as Intel 7265D and adjacent wireless access; the resulting firmware assert interrupts wireless service.

CVSS severity8.1
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel iwlwifi MVM driver allows physically proximate attackers to crash affected Intel wireless firmware. iwl_mvm_mac80211_idx_to_hwrate() returns a legacy PLCP value to ordinary TX_CMD construction instead of the rate index expected by later firmware-format conversion. Reachability requires an older iwlmvm device such as Intel 7265D and adjacent wireless access; the resulting firmware assert interrupts wireless service.

The record

CVE
CVE-2026-64176
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-617, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <6.18.34
  2. Affected versionversion=0 <7.0.11
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6b58a79f2cd98156856eb49e8b55db5facdd7e6d
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6fe92651b44fd3cfc8dcfdaad0e82885c384dada
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb84b5cbcaab3ca0f4e961d92a40ed7f3aac483b

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0 <6.18.34; version=0 <7.0.11; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6b58a79f2cd98156856eb49e8b55db5facdd7e6d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6fe92651b44fd3cfc8dcfdaad0e82885c384dada; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb84b5cbcaab3ca0f4e961d92a40ed7f3aac483b

Published CVSS scores

7.3Red HatCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
8.1kernel.orgCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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