CVE-2023-52987

Local kernel memory corruption via negative array index

Published Mar 27, 2025 · Updated Aug 5, 2026

Array-index underflow in Linux 6.1 through 6.1.10 allows local users to corrupt kernel memory via an SOF mtrace debugfs write. The sof_ipc4_priority_mask_dfs_write() parser accepts a negative signed id, checks only the upper bound, then indexes before logs_priorities_mask. Reachability requires write access to the SOF mtrace logs_priorities_mask debugfs node; exploitation permits kernel compromise or a host panic.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Array-index underflow in Linux 6.1 through 6.1.10 allows local users to corrupt kernel memory via an SOF mtrace debugfs write. The sof_ipc4_priority_mask_dfs_write() parser accepts a negative signed id, checks only the upper bound, then indexes before logs_priorities_mask. Reachability requires write access to the SOF mtrace logs_priorities_mask debugfs node; exploitation permits kernel compromise or a host panic.

The record

CVE
CVE-2023-52987
Published
Mar 27, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-129, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=6.1
  2. Affected versionversion=f4ea22f7aa7536560097d765be56445933d07e0d <d52f34784e4e2f6e77671a9f104d8a69a3b5d24c
  3. Affected versionversion=f4ea22f7aa7536560097d765be56445933d07e0d <ea57680af47587397f5005d7758022441ed66d54

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.1; version=f4ea22f7aa7536560097d765be56445933d07e0d <d52f34784e4e2f6e77671a9f104d8a69a3b5d24c; version=f4ea22f7aa7536560097d765be56445933d07e0d <ea57680af47587397f5005d7758022441ed66d54

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.4Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index
T1068Exploitation for Privilege Escalation

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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