CVE-2026-53182

Summary

In the Linux kernel, the following vulnerability has been resolved:

wifi: nl80211: reject oversized EMA RNR lists

nl80211_parse_rnr_elems() stores the parsed element count in a u8-backed cfg80211_rnr_elems::cnt field and uses that count to size the flexible array allocation.

Reject nested NL80211_ATTR_EMA_RNR_ELEMS input once the count reaches 255, before incrementing it again. This keeps the parser aligned with the data structure it fills and matches the existing bound check used by nl80211_parse_mbssid_elems().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux56189d7bc30531def6b999f27940ee43c6ff2569 < fc0ec2fc02dfe52c5821f36fbccf6a45df43f508affected
LinuxLinuxdbbb27e183b1568d5a907ace1cd144b0709ea52a < 688fcac7054abc680c0eef753f2bb772cfaf8cf7affected
LinuxLinuxdbbb27e183b1568d5a907ace1cd144b0709ea52a < 30c3fa80f423613efdda3deca4af52ff7d20e4e2affected
LinuxLinuxdbbb27e183b1568d5a907ace1cd144b0709ea52a < 265c07c09c837621730d35f02975207a1224bf05affected
LinuxLinuxdbbb27e183b1568d5a907ace1cd144b0709ea52a < ecbf3c45add30a0857414e156bdb9c79906f0ff6affected
LinuxLinuxdbbb27e183b1568d5a907ace1cd144b0709ea52a < 4cd92957e8f8cc4ebfe8a5d4203c14c592fde6b1affected
LinuxLinux6.1.160 < 6.1.176affected
LinuxLinux6.4affected
LinuxLinux0 < 6.4unaffected
LinuxLinux6.1.176 <= 6.1.*unaffected
LinuxLinux6.6.143 <= 6.6.*unaffected
LinuxLinux6.12.94 <= 6.12.*unaffected
LinuxLinux6.18.36 <= 6.18.*unaffected
LinuxLinux7.0.13 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References