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Vulnerability record · CVE-2026-53182 · published 25 June 2026

CVE-2026-53182: Linux kernel vulnerability

Linux · Linux Kernel

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().

7.8 CVSS 3.1 High EPSS 0.13% · top 97.9%
7.8CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
6 Jul 2026Last modified by NVD

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().

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/265c07c09c837621730d35f02975207a1224bf05 Patch
https://git.kernel.org/stable/c/30c3fa80f423613efdda3deca4af52ff7d20e4e2 Patch
https://git.kernel.org/stable/c/4cd92957e8f8cc4ebfe8a5d4203c14c592fde6b1 Patch
https://git.kernel.org/stable/c/688fcac7054abc680c0eef753f2bb772cfaf8cf7 Patch
https://git.kernel.org/stable/c/ecbf3c45add30a0857414e156bdb9c79906f0ff6 Patch
https://git.kernel.org/stable/c/fc0ec2fc02dfe52c5821f36fbccf6a45df43f508 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-53182), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.