CVE-2022-50781

Kernel memory disclosure via negative sysfs index

Published Dec 24, 2025 · Updated Dec 24, 2025

Out-of-bounds read in the Linux kernel's AMDGPU Vega 20 power-management code allows local users to read kernel memory via sysfs. The vega20_odn_edit_dpm_table() PP_OD_EDIT_VDDC_CURVE branch caps input_index at 2 but fails to reject negative values before indexing the voltage curve. The path is local and requires a Vega 20 AMDGPU device plus permission to write the affected sysfs control; the read can expose kernel data.

CVSS severity5.9
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the Linux kernel's AMDGPU Vega 20 power-management code allows local users to read kernel memory via sysfs. The vega20_odn_edit_dpm_table() PP_OD_EDIT_VDDC_CURVE branch caps input_index at 2 but fails to reject negative values before indexing the voltage curve. The path is local and requires a Vega 20 AMDGPU device plus permission to write the affected sysfs control; the read can expose kernel data.

The record

CVE
CVE-2022-50781
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 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=4.20
  2. Affected versionversion=d5bf26539494d16dfabbbea0854a47d202ea15c0 <4d3dc0de9c46d9f73be6bac026e40b893e37ea21
  3. Affected versionversion=d5bf26539494d16dfabbbea0854a47d202ea15c0 <8084bd0a64e278314b733993f388d83a86aa1183
  4. Affected versionversion=d5bf26539494d16dfabbbea0854a47d202ea15c0 <85273b4a7076ed5328c8ace02234e4e7e10972d5
  5. Affected versionversion=d5bf26539494d16dfabbbea0854a47d202ea15c0 <a03625ad11b50429930f4c491d6c97e70f2ba89a
  6. Affected versionversion=d5bf26539494d16dfabbbea0854a47d202ea15c0 <d27252b5706e51188aed7647126e44dcf9e940c1
  7. Affected versionversion=d5bf26539494d16dfabbbea0854a47d202ea15c0 <f289a38df0da4cfe4b50d04b1b9c3bc646fecd57

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.20; version=d5bf26539494d16dfabbbea0854a47d202ea15c0 <4d3dc0de9c46d9f73be6bac026e40b893e37ea21; version=d5bf26539494d16dfabbbea0854a47d202ea15c0 <8084bd0a64e278314b733993f388d83a86aa1183; version=d5bf26539494d16dfabbbea0854a47d202ea15c0 <85273b4a7076ed5328c8ace02234e4e7e10972d5; version=d5bf26539494d16dfabbbea0854a47d202ea15c0 <a03625ad11b50429930f4c491d6c97e70f2ba89a; version=d5bf26539494d16dfabbbea0854a47d202ea15c0 <d27252b5706e51188aed7647126e44dcf9e940c1; version=d5bf26539494d16dfabbbea0854a47d202ea15c0 <f289a38df0da4cfe4b50d04b1b9c3bc646fecd57

Published CVSS scores

5.9SUSECVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N
6.5SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/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

No sourced classifications are available.

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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