CVE-2024-35791
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-35791
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-35791.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2024-35791
- Downstream
- Related
- Published
- 2024-05-17T12:24:49.520Z
- Modified
- 2025-11-28T02:34:55.782051Z
- Summary
- KVM: SVM: Flush pages under kvm->lock to fix UAF in svm_register_enc_region()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
KVM: SVM: Flush pages under kvm->lock to fix UAF in svmregisterenc_region()
Do the cache flush of converted pages in svmregisterencregion() 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 _unregisterencregion_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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/35xxx/CVE-2024-35791.json" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/12f8e32a5a389a5d58afc67728c76e61beee1ad4
- https://git.kernel.org/stable/c/2d13b79640b147bd77c34a5998533b2021a4122d
- https://git.kernel.org/stable/c/4868c0ecdb6cfde7c70cf478c46e06bb9c7e5865
- https://git.kernel.org/stable/c/5ef1d8c1ddbf696e47b226e11888eaf8d9e8e807
- https://git.kernel.org/stable/c/e126b508ed2e616d679d85fca2fbe77bb48bbdd7
- https://git.kernel.org/stable/c/f6d53d8a2617dd58c89171a6b9610c470ebda38a
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/35xxx/CVE-2024-35791.json
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://nvd.nist.gov/vuln/detail/CVE-2024-35791
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced4f627ecde7329e476a077bb0590db8f27bb8f912Fixed2d13b79640b147bd77c34a5998533b2021a4122d
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced19a23da53932bc8011220bd8c410cb76012de004Fixede126b508ed2e616d679d85fca2fbe77bb48bbdd7Fixed4868c0ecdb6cfde7c70cf478c46e06bb9c7e5865Fixed12f8e32a5a389a5d58afc67728c76e61beee1ad4Fixedf6d53d8a2617dd58c89171a6b9610c470ebda38aFixed5ef1d8c1ddbf696e47b226e11888eaf8d9e8e807
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedLast affectedf1ecde00ce1694597f923f0d25f7a797c5243d99Last affected848bcb0a1d96f67d075465667d3a1ad4af56311e
Linux / Kernel
Package
- Name
- Kernel