CVE-2024-35791

High

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Flush pages under kvm->lock to fix UAF in svm_register_enc_region() Do the cache flush of converted pages in svm_register_enc_region() before dropping kvm->lock to fix use-after-free issues where region and/or its array of pages could be freed by a different task, e.g. if userspace has __unregister_enc_region_locked() already queued up for the region. Note, the "obvious" alternative of using local variables doesn't fully resolve the bug, as region->pages is also dynamically allocated. I.e. the region structure itself would be fine, but region->pages could be freed. Flushing multiple pages under kvm->lock is unfortunate, but the entire flow is a rare slow path, and the manual flush is only needed on CPUs that lack coherency for encrypted memory.

Package Linux Kernel
Published 2024-05-17
Last modified 2025-12-23
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

7.8

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-416

CVE-2024-35791 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.10.15, 4.19.176, 5.4.98, 5.11 and later are affected. Fixed in 5.10.215, 5.15.154, 6.1.84, 6.6.24, 6.7.12, 6.8 and their respective stable series.

Affected from
≥ 5.10.15 ≥ 4.19.176 ≥ 5.4.98 ≥ 5.11
Fixed in
✓ 5.10.215 5.10.x ✓ 5.15.154 5.15.x ✓ 6.1.84 6.1.x ✓ 6.6.24 6.6.x ✓ 6.7.12 6.7.x ✓ 6.8

References

7 total
Showing 5 of 7 references View all on NVD

Frequently asked questions

  • What is CVE-2024-35791?

    CVE-2024-35791 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 5.10.15 onward and has been patched in 5.10.215, 5.15.154, 6.1.84 and others. CVE-2024-35791 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2024-35791?

    CVE-2024-35791 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2024-35791?

    Yes. CVE-2024-35791 has been patched. Fixed versions include 5.10.215, 5.15.154, 6.1.84 and others. If you are running Linux kernel 5.10.15 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2024-35791 actively exploited?

    No. CVE-2024-35791 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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