CVE-2026-74554

Kernel memory corruption via MLO peer cleanup

Published Aug 15, 2026 · Updated Aug 15, 2026

Out-of-bounds write in the Linux kernel 7.0 through 7.1.7 allows attackers to corrupt kernel memory during Wi-Fi MLO peer cleanup. ath12k_mac_dp_peer_cleanup() passes a flagged peer ID of at least 0x2000 to clear_bit() for a 256-bit bitmap instead of using the stored unflagged ID. A malicious Wi-Fi MLO peer within radio range can trigger memory corruption or exhaust peer IDs; the 7.2 line is affected before 7.2-rc6.

CVSS severity8.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the Linux kernel 7.0 through 7.1.7 allows attackers to corrupt kernel memory during Wi-Fi MLO peer cleanup. ath12k_mac_dp_peer_cleanup() passes a flagged peer ID of at least 0x2000 to clear_bit() for a 256-bit bitmap instead of using the stored unflagged ID. A malicious Wi-Fi MLO peer within radio range can trigger memory corruption or exhaust peer IDs; the 7.2 line is affected before 7.2-rc6.

The record

CVE
CVE-2026-74554
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=7.0
  2. Affected versionversion=ee16dcf573d5e3283fda601dd4bca6bc52251017 <234b5cb81e6fcc1e3b31b13deff66130be55f36e
  3. Affected versionversion=ee16dcf573d5e3283fda601dd4bca6bc52251017 <47abd2ca281531deee38a3b3770d885e270e9fc9

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=7.0; version=ee16dcf573d5e3283fda601dd4bca6bc52251017 <234b5cb81e6fcc1e3b31b13deff66130be55f36e; version=ee16dcf573d5e3283fda601dd4bca6bc52251017 <47abd2ca281531deee38a3b3770d885e270e9fc9

Published CVSS scores

6.4SUSECVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
8.8Linux Kernel CNACVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.1Amazon LinuxCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

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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