CVE-2026-64255 (GCVE-0-2026-64255)
Vulnerability from cvelistv5
Published
2026-07-24 15:31
Modified
2026-10-19 20:28
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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().
References
Impacted products
Vendor Product Version
Linux Linux Version: 9aa3856d9b6f3f8bf085b5bbb5f3703578bf452b
Version: 9aa3856d9b6f3f8bf085b5bbb5f3703578bf452b
Version: 9aa3856d9b6f3f8bf085b5bbb5f3703578bf452b
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