CVE-2023-53778

Kernel crash via unchecked DMA transfer arithmetic

Published Dec 9, 2025 · Updated Aug 5, 2026

Integer overflow in the Linux kernel 6.4 QAIC accelerator driver allows local users to crash the host via crafted DMA transfer requests. The find_and_map_user_pages() path failed to validate subtraction and addition around transferred-byte counts and allowed allocation-size truncation on 32-bit systems. Access to a QAIC accelerator device is required; malformed multipart transfers can corrupt kernel memory, exhaust memory, or trigger a kernel oops.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in the Linux kernel 6.4 QAIC accelerator driver allows local users to crash the host via crafted DMA transfer requests. The find_and_map_user_pages() path failed to validate subtraction and addition around transferred-byte counts and allowed allocation-size truncation on 32-bit systems. Access to a QAIC accelerator device is required; malformed multipart transfers can corrupt kernel memory, exhaust memory, or trigger a kernel oops.

The record

CVE
CVE-2023-53778
Published
Dec 9, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 9, 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=129776ac2e38231fa9c02ce20e116c99de291666 <96d3c1cadedb6ae2e8965e19cd12caa244afbd9c
  2. Affected versionversion=129776ac2e38231fa9c02ce20e116c99de291666 <d410a96e5cb8c1ec7049c83f2edcd8bbfaf5d9b3
  3. Affected versionversion=6.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=129776ac2e38231fa9c02ce20e116c99de291666 <96d3c1cadedb6ae2e8965e19cd12caa244afbd9c; version=129776ac2e38231fa9c02ce20e116c99de291666 <d410a96e5cb8c1ec7049c83f2edcd8bbfaf5d9b3; version=6.4

Published CVSS scores

7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8LinuxCVSS: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.

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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

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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