CVE-2022-50440

System crash via oversized DMA copy box

Published Oct 1, 2025 · Updated Oct 1, 2025

Memory corruption in the Linux kernel allows local users to crash systems via an oversized vmwgfx DMA surface-copy box. The cursor-snooping path in drivers/gpu/drm/vmwgfx/vmwgfx_kms.c passes unchecked copy-box dimensions to memcpy, overflowing the snooped image buffer. Exploitation requires local low-privileged access on a system using vmwgfx; the published description establishes crashes, not code execution.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the Linux kernel allows local users to crash systems via an oversized vmwgfx DMA surface-copy box. The cursor-snooping path in drivers/gpu/drm/vmwgfx/vmwgfx_kms.c passes unchecked copy-box dimensions to memcpy, overflowing the snooped image buffer. Exploitation requires local low-privileged access on a system using vmwgfx; the published description establishes crashes, not code execution.

The record

CVE
CVE-2022-50440
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2025Record 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=2ac863719e518ae1a8f328849e64ea26a222f079 <439cbbc1519547f9a7b483f0de33b556ebfec901
  2. Affected versionversion=2ac863719e518ae1a8f328849e64ea26a222f079 <4cf949c7fafe21e085a4ee386bb2dade9067316e
  3. Affected versionversion=2ac863719e518ae1a8f328849e64ea26a222f079 <4d54d11b49860686331c58a00f733b16a93edfc4
  4. Affected versionversion=2ac863719e518ae1a8f328849e64ea26a222f079 <50d177f90b63ea4138560e500d92be5e4c928186
  5. Affected versionversion=2ac863719e518ae1a8f328849e64ea26a222f079 <622d527decaac0eb65512acada935a0fdc1d0202
  6. Affected versionversion=2ac863719e518ae1a8f328849e64ea26a222f079 <6948e570f54f2044dd4da444b10471373a047eeb
  7. Affected versionversion=2ac863719e518ae1a8f328849e64ea26a222f079 <6b4e70a428b5a11f56db94047b68e144529fe512
  8. Affected versionversion=2ac863719e518ae1a8f328849e64ea26a222f079 <94b283341f9f3f0ed56a360533766377a01540e0
  9. Affected versionversion=2ac863719e518ae1a8f328849e64ea26a222f079 <ee8d31836cbe7c26e207bfa0a4a726f0a25cfcf6
  10. Affected versionversion=3.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2ac863719e518ae1a8f328849e64ea26a222f079 <439cbbc1519547f9a7b483f0de33b556ebfec901; version=2ac863719e518ae1a8f328849e64ea26a222f079 <4cf949c7fafe21e085a4ee386bb2dade9067316e; version=2ac863719e518ae1a8f328849e64ea26a222f079 <4d54d11b49860686331c58a00f733b16a93edfc4; version=2ac863719e518ae1a8f328849e64ea26a222f079 <50d177f90b63ea4138560e500d92be5e4c928186; version=2ac863719e518ae1a8f328849e64ea26a222f079 <622d527decaac0eb65512acada935a0fdc1d0202; version=2ac863719e518ae1a8f328849e64ea26a222f079 <6948e570f54f2044dd4da444b10471373a047eeb; version=2ac863719e518ae1a8f328849e64ea26a222f079 <6b4e70a428b5a11f56db94047b68e144529fe512; version=2ac863719e518ae1a8f328849e64ea26a222f079 <94b283341f9f3f0ed56a360533766377a01540e0; version=2ac863719e518ae1a8f328849e64ea26a222f079 <ee8d31836cbe7c26e207bfa0a4a726f0a25cfcf6; version=3.2

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS: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.

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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-476NULL Pointer Dereference
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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