CVE-2026-68407

Memory exhaustion via rejected RNR allocation leak

Published Aug 10, 2026 · Updated Aug 10, 2026

Resource leak in the Linux kernel nl80211 subsystem allows local users to exhaust memory through malformed EMA beacon configuration. nl80211_parse_beacon() rejects RNR data when fewer RNR entries than MBSSID entries are supplied, but returns without freeing the unattached allocation. The path must process EMA MBSSID and RNR data; systems not using nl80211 beacon parsing are unaffected.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in the Linux kernel nl80211 subsystem allows local users to exhaust memory through malformed EMA beacon configuration. nl80211_parse_beacon() rejects RNR data when fewer RNR entries than MBSSID entries are supplied, but returns without freeing the unattached allocation. The path must process EMA MBSSID and RNR data; systems not using nl80211 beacon parsing are unaffected.

The record

CVE
CVE-2026-68407
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772, T1499.001
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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
  2. Affected versionversion=6.1.160 <6.2
  3. Affected versionversion=6.4
  4. Affected versionversion=dbbb27e183b1568d5a907ace1cd144b0709ea52a <07a95ec2b54774201fdf4ef7ffb0ca2ab19ed29c
  5. Affected versionversion=dbbb27e183b1568d5a907ace1cd144b0709ea52a <312c8b9d7836ef58e552619a8c19be08b04032bb
  6. Affected versionversion=dbbb27e183b1568d5a907ace1cd144b0709ea52a <6f919f29e9b75793104709987131b8d910d7800a
  7. Affected versionversion=dbbb27e183b1568d5a907ace1cd144b0709ea52a <fa9592ef7de11f8c7042315d9bc20e91a97f679e
  8. Affected versionversion=dbbb27e183b1568d5a907ace1cd144b0709ea52a <fb052a6e2fa866384d8edc237746583ec94c15af

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=56189d7bc30531def6b999f27940ee43c6ff2569; version=6.1.160 <6.2; version=6.4; version=dbbb27e183b1568d5a907ace1cd144b0709ea52a <07a95ec2b54774201fdf4ef7ffb0ca2ab19ed29c; version=dbbb27e183b1568d5a907ace1cd144b0709ea52a <312c8b9d7836ef58e552619a8c19be08b04032bb; version=dbbb27e183b1568d5a907ace1cd144b0709ea52a <6f919f29e9b75793104709987131b8d910d7800a; version=dbbb27e183b1568d5a907ace1cd144b0709ea52a <fa9592ef7de11f8c7042315d9bc20e91a97f679e; version=dbbb27e183b1568d5a907ace1cd144b0709ea52a <fb052a6e2fa866384d8edc237746583ec94c15af

Published CVSS scores

2.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-772Missing Release of Resource after Effective Lifetime
T1499.001OS Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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