CVE-2023-53578

Local uninitialized memory access via undersized QRTR packet

Published Oct 4, 2025 · Updated Oct 4, 2025

Uninitialized resource access in the Linux kernel allows local users to trigger an uninitialized memory read through the QRTR tunnel interface. qrtr_endpoint_post accepts an undersized QRTR_TYPE_RESUME_TX packet and passes its buffer to qrtr_tx_resume, which reads fields beyond initialized data. The public record confirms the KMSAN uninitialized-value fault but does not establish disclosure, privilege gain, or a reliable service interruption.

CVSS severity7.8
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uninitialized resource access in the Linux kernel allows local users to trigger an uninitialized memory read through the QRTR tunnel interface. qrtr_endpoint_post accepts an undersized QRTR_TYPE_RESUME_TX packet and passes its buffer to qrtr_tx_resume, which reads fields beyond initialized data. The public record confirms the KMSAN uninitialized-value fault but does not establish disclosure, privilege gain, or a reliable service interruption.

The record

CVE
CVE-2023-53578
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.6
  2. Affected versionversion=5fdeb0d372ab33b4175043a2a4a1730239a217f1 <3814d211ff13ee35f2d9437439a6c7df58524137
  3. Affected versionversion=5fdeb0d372ab33b4175043a2a4a1730239a217f1 <6417070918de3bcdbe0646e7256dae58fd8083ba
  4. Affected versionversion=5fdeb0d372ab33b4175043a2a4a1730239a217f1 <8c9ce34a6ff2c544f96ce0b088e8fd3c1b9698c4
  5. Affected versionversion=5fdeb0d372ab33b4175043a2a4a1730239a217f1 <bef57c227b52c2bde00fad33556175d36d12cfa0
  6. Affected versionversion=5fdeb0d372ab33b4175043a2a4a1730239a217f1 <c6a796ee5a639ffb83c6e5469408cc2ec16cac6a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.6; version=5fdeb0d372ab33b4175043a2a4a1730239a217f1 <3814d211ff13ee35f2d9437439a6c7df58524137; version=5fdeb0d372ab33b4175043a2a4a1730239a217f1 <6417070918de3bcdbe0646e7256dae58fd8083ba; version=5fdeb0d372ab33b4175043a2a4a1730239a217f1 <8c9ce34a6ff2c544f96ce0b088e8fd3c1b9698c4; version=5fdeb0d372ab33b4175043a2a4a1730239a217f1 <bef57c227b52c2bde00fad33556175d36d12cfa0; version=5fdeb0d372ab33b4175043a2a4a1730239a217f1 <c6a796ee5a639ffb83c6e5469408cc2ec16cac6a

Published CVSS scores

7.8NIST NVDCVSS: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.

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

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-908Use of Uninitialized Resource

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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