CVE Vulnerability
CVE-2022-23033
arm: guest_physmap_remove_page not removing the p2m mappings The functions to remove one or more entries from a guest p2m pagetable on Arm (p2m_remove_mapping, guest_physmap_remove_page, and p2m_set_entry with mfn set to INVALID_MFN) do not actually clear the pagetable entry if the entry doesn't have the valid bit set. It is possible to have a valid pagetable entry without the valid bit set when a guest operating system uses set/way cache maintenance instructions. For instance, a guest issuing a set/way cache maintenance instruction, then calling the XENMEM_decrease_reservation hypercall to give back memory pages to Xen, might be able to retain access to those pages even after Xen started reusing them for other purposes.
References
| Link | Resource |
|---|---|
| https://xenbits.xenproject.org/xsa/advisory-393.txt | Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2022/01/25/2 | Mailing List Patch |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3/ | Mailing List Third Party Advisory |
| https://www.debian.org/security/2022/dsa-5117 | Third Party Advisory |
| https://security.gentoo.org/glsa/202208-23 | Third Party Advisory |
Configurations
Configuration 1
|
Information
Published : 2022-01-25 02:15
Updated : 2022-08-19 10:54
NVD link : CVE-2022-23033
Mitre link : CVE-2022-23033
Products Affected
No products.
CWE