8.1

CVE-2026-64176: wifi: iwlwifi: mvm: fix driver-set TX rates on old devices

Modified
AliasesUBUNTU-CVE-2026-64176DEBIAN-CVE-2026-64176
Published 19-07-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-64176 is a high (CVSS 8.1) Incorrect Calculation vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.1, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 10 · Related 8
RHSA-2026:68507RHSA-2026:68570USN-8593-1USN-8603-1USN-8618-1USN-8663-1

Timeline

  1. 19-07-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: mvm: fix driver-set TX rates on old devices On old devices such as 7265D, rates are still encoded in version 1 format, which doesn't use the CCK/OFDM rate index (0-3/0-7) but rather their PLCP value (e.g. 10 for 1 Mbps CCK rate.) While introducing v3 rates, I changed the driver from internally handling v1 rates and converting to v2, to internally handling v3 and converting to v1 or v2 according to the firmware. I accordingly changed the code in iwl_mvm_mac80211_idx_to_hwrate() to no longer have different values for different APIs. This was correct. However, I later reverted this part of the change, because it was reported that I had broken beacon rates, causing a FW assert/crash. This caused TX_CMD rates to be set incorrectly, potentially causing a warning when reported back from the device as having been used. Fix this (hopefully correctly now) by handling beacon rates in the TX_CMD that's embedded in the beacon template command separately. Restore iwl_mvm_mac80211_idx_to_hwrate() to return only the rate index, not PLCP value, fixing the real TX_CMD.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

Increase +0.06 pp

From 0.21% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu119 products
  • linux< 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 3592c0083fb29cca13cd9978b8844d58b4eff548, < 6fe92651b44fd3cfc8dcfdaad0e82885c384dada | ≥ 3592c0083fb29cca13cd9978b8844d58b4eff548, < 6b58a79f2cd98156856eb49e8b55db5facdd7e6d | ≥ 3592c0083fb29cca13cd9978b8844d58b4eff548, < fb84b5cbcaab3ca0f4e961d92a40ed7f3aac483b | c6c14c2b08e9c4c82e1ec39ef3e8b9ec845ac7fd | ≥ 6.17.9, < 6.18 | 6.18
  • linux_kernel≥ 6.17.9, < 6.18 | ≥ 6.18.1, < 6.18.34 | ≥ 6.19, < 7.0.11 | 6.18 | 6.18:rc6 | 6.18:rc7 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4
Debian1 product
  • linux< 7.0.12-1

3 vendors · 122 products

References

15 links
Show all 15 references