CVE-2026-64255
Description
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().
Metadata
Severity & Metrics
No CVSS data available.
Affected products (2)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| Linux | Linux | — | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1de92789ce31e46fa7e7d8e89c90b19cdb1c103b, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fe7f339f63c9dc4ca546ed7ac38ba4bb3a99dcfc, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f056fc2b927448d37eca6b6cacc3d1b0f67b20d2, 0 < 6.18.38 … |
| Linux | Linux | — | 6.18.38 ≤ 6.18.*, 7.1.3 ≤ 7.1.*, 7.2-rc1 ≤ * |
References (3)