CVE-2026-64255

CVE CVE-2026-64255EUVD EUVD-2026-48664Published 2026-07-24T15:31:22.000ZLast changed 2026-08-05T12:40:18.000ZCVSS 8.8

What the advisory describes

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().

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 0; 6.4; 9aa3856d9b6f3f8bf085b5bbb5f3703578bf452b <fe7f339f63c9dc4ca546ed7ac38ba4bb3a99dcfc; patch: 7.1.3; patch: 6.18.38; 9aa3856d9b6f3f8bf085b5bbb5f3703578bf452b <f056fc2b927448d37eca6b6cacc3d1b0f67b20d2; 9aa3856d9b6f3f8bf085b5bbb5f3703578bf452b <1de92789ce31e46fa7e7d8e89c90b19cdb1c103b; patch: 7.2-rc1

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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