CVE-2026-64255
wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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().
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 24, 2026 |
| Last Updated | Aug 5, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new high vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
9aa3856d9b6f3f8bf085b5bbb5f3703578bf452b < 1de92789ce31e46fa7e7d8e89c90b19cdb1c103b 9aa3856d9b6f3f8bf085b5bbb5f3703578bf452b < fe7f339f63c9dc4ca546ed7ac38ba4bb3a99dcfc 9aa3856d9b6f3f8bf085b5bbb5f3703578bf452b < f056fc2b927448d37eca6b6cacc3d1b0f67b20d2
Linux / Linux
6.4