CVE-2022-50619

Kernel memory consumption via leaked SG tables

Published Dec 8, 2025 · Updated May 11, 2026

Memory leak in AMD KFD in Linux 5.14 and later affected branches allows local users to consume kernel memory through user-pointer mappings. kfd_mem_dmamap_userptr allocates an SG table before comparing the user-pointer and SG buffer page counts, then returns EINVAL without freeing that table when they differ. Only AMD KFD user-pointer mappings with mismatched page counts reach the leak; no data disclosure or modification is reported.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
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 AMD KFD in Linux 5.14 and later affected branches allows local users to consume kernel memory through user-pointer mappings. kfd_mem_dmamap_userptr allocates an SG table before comparing the user-pointer and SG buffer page counts, then returns EINVAL without freeing that table when they differ. Only AMD KFD user-pointer mappings with mismatched page counts reach the leak; no data disclosure or modification is reported.

The record

CVE
CVE-2022-50619
Published
Dec 8, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 8, 2025CVE 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?

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  1. Affected versionversion=264fb4d332f5e76743818480e482464437837c52 <304a10161696d86300ceab1cbe72b2d74b8cdd94
  2. Affected versionversion=264fb4d332f5e76743818480e482464437837c52 <90bfee142af0f0e9d3bec80e7acd5f49b230acf7
  3. Affected versionversion=264fb4d332f5e76743818480e482464437837c52 <c6dc4c9ba093829ebe1450d5fb101da6fb7a2a58
  4. Affected versionversion=5.14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=264fb4d332f5e76743818480e482464437837c52 <304a10161696d86300ceab1cbe72b2d74b8cdd94; version=264fb4d332f5e76743818480e482464437837c52 <90bfee142af0f0e9d3bec80e7acd5f49b230acf7; version=264fb4d332f5e76743818480e482464437837c52 <c6dc4c9ba093829ebe1450d5fb101da6fb7a2a58; version=5.14

Published CVSS scores

No CVSS assessment is available in this record.

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

T1499.004Application or System Exploitation

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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