CVE-2026-53182

Kernel memory corruption via wrapped RNR count

Published Jun 25, 2026 · Updated Jun 25, 2026

Heap out-of-bounds write in the Linux Kernel allows local users to corrupt kernel memory through an oversized EMA RNR list. nl80211_parse_rnr_elems() increments an element count beyond the u8 range, wraps cfg80211_rnr_elems::cnt, and allocates a flexible array too small for the parsed entries. A local user able to submit the relevant nl80211 configuration can overwrite adjacent kernel heap memory, enabling a kernel crash or modification of privileged kernel state.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap out-of-bounds write in the Linux Kernel allows local users to corrupt kernel memory through an oversized EMA RNR list. nl80211_parse_rnr_elems() increments an element count beyond the u8 range, wraps cfg80211_rnr_elems::cnt, and allocates a flexible array too small for the parsed entries. A local user able to submit the relevant nl80211 configuration can overwrite adjacent kernel heap memory, enabling a kernel crash or modification of privileged kernel state.

The record

CVE
CVE-2026-53182
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=56189d7bc30531def6b999f27940ee43c6ff2569 <fc0ec2fc02dfe52c5821f36fbccf6a45df43f508
  2. Affected versionversion=6.1.160 <6.1.176
  3. Affected versionversion=6.4
  4. Affected versionversion=dbbb27e183b1568d5a907ace1cd144b0709ea52a <265c07c09c837621730d35f02975207a1224bf05
  5. Affected versionversion=dbbb27e183b1568d5a907ace1cd144b0709ea52a <30c3fa80f423613efdda3deca4af52ff7d20e4e2
  6. Affected versionversion=dbbb27e183b1568d5a907ace1cd144b0709ea52a <4cd92957e8f8cc4ebfe8a5d4203c14c592fde6b1
  7. Affected versionversion=dbbb27e183b1568d5a907ace1cd144b0709ea52a <688fcac7054abc680c0eef753f2bb772cfaf8cf7
  8. Affected versionversion=dbbb27e183b1568d5a907ace1cd144b0709ea52a <ecbf3c45add30a0857414e156bdb9c79906f0ff6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=56189d7bc30531def6b999f27940ee43c6ff2569 <fc0ec2fc02dfe52c5821f36fbccf6a45df43f508; version=6.1.160 <6.1.176; version=6.4; version=dbbb27e183b1568d5a907ace1cd144b0709ea52a <265c07c09c837621730d35f02975207a1224bf05; version=dbbb27e183b1568d5a907ace1cd144b0709ea52a <30c3fa80f423613efdda3deca4af52ff7d20e4e2; version=dbbb27e183b1568d5a907ace1cd144b0709ea52a <4cd92957e8f8cc4ebfe8a5d4203c14c592fde6b1; version=dbbb27e183b1568d5a907ace1cd144b0709ea52a <688fcac7054abc680c0eef753f2bb772cfaf8cf7; version=dbbb27e183b1568d5a907ace1cd144b0709ea52a <ecbf3c45add30a0857414e156bdb9c79906f0ff6

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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