CVE-2024-35791

Kernel memory corruption via encrypted-region race

Published May 17, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel KVM SVM allows local users to trigger stale kernel-memory access during encrypted-region registration. The svm_register_enc_region() path releases kvm->lock before flushing converted pages, allowing a queued unregister task to free the region or its pages first. Exploitation requires concurrent encrypted-region unregister activity and a CPU without encrypted-memory coherency; the stale access can destabilize the host kernel.

CVSS severity7.8
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

Use-after-free in Linux kernel KVM SVM allows local users to trigger stale kernel-memory access during encrypted-region registration. The svm_register_enc_region() path releases kvm->lock before flushing converted pages, allowing a queued unregister task to free the region or its pages first. Exploitation requires concurrent encrypted-region unregister activity and a CPU without encrypted-memory coherency; the stale access can destabilize the host kernel.

The record

CVE
CVE-2024-35791
Published
May 17, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 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=19a23da53932bc8011220bd8c410cb76012de004 <12f8e32a5a389a5d58afc67728c76e61beee1ad4
  2. Affected versionversion=19a23da53932bc8011220bd8c410cb76012de004 <4868c0ecdb6cfde7c70cf478c46e06bb9c7e5865
  3. Affected versionversion=19a23da53932bc8011220bd8c410cb76012de004 <5ef1d8c1ddbf696e47b226e11888eaf8d9e8e807
  4. Affected versionversion=19a23da53932bc8011220bd8c410cb76012de004 <e126b508ed2e616d679d85fca2fbe77bb48bbdd7
  5. Affected versionversion=19a23da53932bc8011220bd8c410cb76012de004 <f6d53d8a2617dd58c89171a6b9610c470ebda38a
  6. Affected versionversion=4.19.176 <4.20
  7. Affected versionversion=4f627ecde7329e476a077bb0590db8f27bb8f912 <2d13b79640b147bd77c34a5998533b2021a4122d
  8. Affected versionversion=5.10.15 <5.10.215
  9. Affected versionversion=5.11
  10. Affected versionversion=5.4.98 <5.5
  11. Affected versionversion=848bcb0a1d96f67d075465667d3a1ad4af56311e
  12. Affected versionversion=f1ecde00ce1694597f923f0d25f7a797c5243d99

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=19a23da53932bc8011220bd8c410cb76012de004 <12f8e32a5a389a5d58afc67728c76e61beee1ad4; version=19a23da53932bc8011220bd8c410cb76012de004 <4868c0ecdb6cfde7c70cf478c46e06bb9c7e5865; version=19a23da53932bc8011220bd8c410cb76012de004 <5ef1d8c1ddbf696e47b226e11888eaf8d9e8e807; version=19a23da53932bc8011220bd8c410cb76012de004 <e126b508ed2e616d679d85fca2fbe77bb48bbdd7; version=19a23da53932bc8011220bd8c410cb76012de004 <f6d53d8a2617dd58c89171a6b9610c470ebda38a; version=4.19.176 <4.20; version=4f627ecde7329e476a077bb0590db8f27bb8f912 <2d13b79640b147bd77c34a5998533b2021a4122d; version=5.10.15 <5.10.215; version=5.11; version=5.4.98 <5.5; version=848bcb0a1d96f67d075465667d3a1ad4af56311e; version=f1ecde00ce1694597f923f0d25f7a797c5243d99

Published CVSS scores

7.8NIST NVDCVSS: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

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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

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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