CVE-2023-52684

Local service interruption via leaked SCM buffers

Published May 17, 2024 · Updated May 11, 2026

Memory leak in the Linux kernel 6.7 qseecom UEFI secure-app driver allows local users to interrupt service through failing SCM calls. Error paths in drivers/firmware/qcom/qcom_qseecom_uefisecapp.c return directly after allocation instead of reaching cleanup labels that free SCM-call buffers. Repeated access requires local low-privileged execution on a Qualcomm platform using the UEFI secure application and can exhaust kernel memory until service fails.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the Linux kernel 6.7 qseecom UEFI secure-app driver allows local users to interrupt service through failing SCM calls. Error paths in drivers/firmware/qcom/qcom_qseecom_uefisecapp.c return directly after allocation instead of reaching cleanup labels that free SCM-call buffers. Repeated access requires local low-privileged execution on a Qualcomm platform using the UEFI secure application and can exhaust kernel memory until service fails.

The record

CVE
CVE-2023-52684
Published
May 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.7
  2. Affected versionversion=759e7a2b62eb3ef3c93ffeb5cca788a09627d7d9 <6c57d7b593c4a4e60db65d5ce0fe1d9f79ccbe9b
  3. Affected versionversion=759e7a2b62eb3ef3c93ffeb5cca788a09627d7d9 <85fdbf6840455be64eac16bdfe0df3368ee3d0f0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=759e7a2b62eb3ef3c93ffeb5cca788a09627d7d9 <6c57d7b593c4a4e60db65d5ce0fe1d9f79ccbe9b; version=759e7a2b62eb3ef3c93ffeb5cca788a09627d7d9 <85fdbf6840455be64eac16bdfe0df3368ee3d0f0

Published CVSS scores

5.5CISA-ADPCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

CWE-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

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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