CVE-2026-53182 PUBLISHED

wifi: nl80211: reject oversized EMA RNR lists

Assigner: Linux
Reserved: 09.06.2026 Published: 25.06.2026 Updated: 25.06.2026

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().

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 56189d7bc30531def6b999f27940ee43c6ff2569 to fc0ec2fc02dfe52c5821f36fbccf6a45df43f508 (excl.)
  • affected from dbbb27e183b1568d5a907ace1cd144b0709ea52a to 688fcac7054abc680c0eef753f2bb772cfaf8cf7 (excl.)
  • affected from dbbb27e183b1568d5a907ace1cd144b0709ea52a to 30c3fa80f423613efdda3deca4af52ff7d20e4e2 (excl.)
  • affected from dbbb27e183b1568d5a907ace1cd144b0709ea52a to 265c07c09c837621730d35f02975207a1224bf05 (excl.)
  • affected from dbbb27e183b1568d5a907ace1cd144b0709ea52a to ecbf3c45add30a0857414e156bdb9c79906f0ff6 (excl.)
  • affected from dbbb27e183b1568d5a907ace1cd144b0709ea52a to 4cd92957e8f8cc4ebfe8a5d4203c14c592fde6b1 (excl.)
  • affected from 6.1.160 to 6.1.176 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.4 is affected
  • unaffected from 0 to 6.4 (excl.)
  • unaffected from 6.1.176 to 6.1.* (incl.)
  • unaffected from 6.6.143 to 6.6.* (incl.)
  • unaffected from 6.12.94 to 6.12.* (incl.)
  • unaffected from 6.18.36 to 6.18.* (incl.)
  • unaffected from 7.0.13 to 7.0.* (incl.)
  • unaffected from 7.1 to * (incl.)

References