PT-2026-64370 · Linux · Linux
CVE-2026-64255
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Published
2026-07-24
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Updated
2026-07-24
None
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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().
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Related Identifiers
Affected Products
Linux