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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2024-35791 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/12f8e32a5a389a5d58afc67728c76e61beee1ad4 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/2d13b79640b147bd77c34a5998533b2021a4122d CVE, kernel.org Patch 
https://git.kernel.org/stable/c/4868c0ecdb6cfde7c70cf478c46e06bb9c7e5865 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/5ef1d8c1ddbf696e47b226e11888eaf8d9e8e807 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/e126b508ed2e616d679d85fca2fbe77bb48bbdd7 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/f6d53d8a2617dd58c89171a6b9610c470ebda38a CVE, kernel.org Patch 
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html CVE Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

6 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2024-35791
NVD Published Date:
05/17/2024
NVD Last Modified:
12/23/2025
Source:
kernel.org