CVE-2026-53182

wifi: nl80211: reject oversized EMA RNR lists

State: Published
Severity: 7.8 High
Published: Jun 25, 2026
Updated: Oct 19, 2026
Reserved: Jun 9, 2026

Description

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().

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

CWE-190 Integer Overflow or Wraparound

Affected Products

Product	Versions
LinuxLinux	56189d7bc30531def6b999f27940ee43c6ff2569 to before fc0ec2fc02dfe52c5821f36fbccf6a45df43f508Affected dbbb27e183b1568d5a907ace1cd144b0709ea52a to before 688fcac7054abc680c0eef753f2bb772cfaf8cf7Affected dbbb27e183b1568d5a907ace1cd144b0709ea52a to before 30c3fa80f423613efdda3deca4af52ff7d20e4e2Affected dbbb27e183b1568d5a907ace1cd144b0709ea52a to before 265c07c09c837621730d35f02975207a1224bf05Affected dbbb27e183b1568d5a907ace1cd144b0709ea52a to before ecbf3c45add30a0857414e156bdb9c79906f0ff6Affected dbbb27e183b1568d5a907ace1cd144b0709ea52a to before 4cd92957e8f8cc4ebfe8a5d4203c14c592fde6b1Affected 6.1.160 to before 6.1.176Affected
LinuxLinux	6.4Affected before 6.4Not affected 6.1.176 through 6.1.Not affected 6.6.143 through 6.6.Not affected 6.12.94 through 6.12.Not affected 6.18.36 through 6.18.Not affected 7.0.13 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

56189d7bc30531def6b999f27940ee43c6ff2569 to before fc0ec2fc02dfe52c5821f36fbccf6a45df43f508Affected
dbbb27e183b1568d5a907ace1cd144b0709ea52a to before 688fcac7054abc680c0eef753f2bb772cfaf8cf7Affected
dbbb27e183b1568d5a907ace1cd144b0709ea52a to before 30c3fa80f423613efdda3deca4af52ff7d20e4e2Affected
dbbb27e183b1568d5a907ace1cd144b0709ea52a to before 265c07c09c837621730d35f02975207a1224bf05Affected
dbbb27e183b1568d5a907ace1cd144b0709ea52a to before ecbf3c45add30a0857414e156bdb9c79906f0ff6Affected
dbbb27e183b1568d5a907ace1cd144b0709ea52a to before 4cd92957e8f8cc4ebfe8a5d4203c14c592fde6b1Affected
6.1.160 to before 6.1.176Affected

LinuxLinux

6.4Affected
before 6.4Not affected
6.1.176 through 6.1.*Not affected
6.6.143 through 6.6.*Not affected
6.12.94 through 6.12.*Not affected
6.18.36 through 6.18.*Not affected
7.0.13 through 7.0.*Not affected
7.1 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.