CVE-2022-48797

Memory corruption via miscounted COW page references

Published Jul 16, 2024 · Updated Aug 5, 2026

Memory corruption in Linux 5.9 through 5.16.10 allows local users to desynchronize CPU and DMA views of pinned pages. In change_pte_range(), page_mapcount() ignores nonmapping GUP references, so NUMA protection can migrate a COW page that remains pinned for device DMA. The path requires a local low-privilege process, NUMA balancing or lazy mbind, and a pinned writable page; CPU and device divergence can corrupt data or hang workloads.

CVSS severity7.1
High
EPSS probability0.24%
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 Linux 5.9 through 5.16.10 allows local users to desynchronize CPU and DMA views of pinned pages. In change_pte_range(), page_mapcount() ignores nonmapping GUP references, so NUMA protection can migrate a COW page that remains pinned for device DMA. The path requires a local low-privilege process, NUMA balancing or lazy mbind, and a pinned writable page; CPU and device divergence can corrupt data or hang workloads.

The record

CVE
CVE-2022-48797
Published
Jul 16, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 16, 2024CVE 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=09854ba94c6aad7886996bfbee2530b3d8a7f4f4 <254090925e16abd914c87b4ad1b489440d89c4c3
  2. Affected versionversion=09854ba94c6aad7886996bfbee2530b3d8a7f4f4 <80d47f5de5e311cbc0d01ebb6ee684e8f4c196c6
  3. Affected versionversion=09854ba94c6aad7886996bfbee2530b3d8a7f4f4 <b3dc4b9d3ca68b370c4aeab5355007eedf948849
  4. Affected versionversion=09854ba94c6aad7886996bfbee2530b3d8a7f4f4 <d187eeb02d18446e5e54ed6bcbf8b47e6551daea
  5. Affected versionversion=5.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=09854ba94c6aad7886996bfbee2530b3d8a7f4f4 <254090925e16abd914c87b4ad1b489440d89c4c3; version=09854ba94c6aad7886996bfbee2530b3d8a7f4f4 <80d47f5de5e311cbc0d01ebb6ee684e8f4c196c6; version=09854ba94c6aad7886996bfbee2530b3d8a7f4f4 <b3dc4b9d3ca68b370c4aeab5355007eedf948849; version=09854ba94c6aad7886996bfbee2530b3d8a7f4f4 <d187eeb02d18446e5e54ed6bcbf8b47e6551daea; version=5.9

Published CVSS scores

5.5Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.1Linux CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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 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

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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