CVE-2022-23033 Other in xen
A flaw in Xen's Arm p2m mapping removal allows guests to retain access to freed memory pages, potentially leading to data leakage or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-23033?
CVE-2022-23033 is a high-severity vulnerability in Debian Debian Linux, published on 25 Jan 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-404
Which versions are affected by CVE-2022-23033?
It affects 3 products.
Products include Debian Debian Linux, Fedoraproject Fedora, Xen Xen.
How do I fix CVE-2022-23033?
Apply the vendor's patch.
Is CVE-2022-23033 being exploited?
There is no known exploitation of CVE-2022-23033 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALPINE-CVE-2022-23033, DEBIAN-CVE-2022-23033, GHSA-74f6-jp2h-2vw3, UBUNTU-CVE-2022-23033.