CVE-2023-46842 — Type Confusion in Fedora
Severity
6.5MEDIUMNVD
EPSS
2.1%
top 15.94%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMay 16
Description
Unlike 32-bit PV guests, HVM guests may switch freely between 64-bit and
other modes. This in particular means that they may set registers used
to pass 32-bit-mode hypercall arguments to values outside of the range
32-bit code would be able to set them to.
When processing of hypercalls takes a considerable amount of time,
the hypervisor may choose to invoke a hypercall continuation. Doing so
involves putting (perhaps updated) hypercall arguments in respective
registers. For guests not running i…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:HExploitability: 2.0 | Impact: 4.0
Patches
🔴Vulnerability Details
4GHSA▶
GHSA-hcr5-hp8w-36q9: Unlike 32-bit PV guests, HVM guests may switch freely between 64-bit and
other modes↗2024-05-16
OSV▶
CVE-2023-46842: Unlike 32-bit PV guests, HVM guests may switch freely between 64-bit and
other modes↗2024-05-16
OSV▶
CVE-2023-46842: Unlike 32-bit PV guests, HVM guests may switch freely between 64-bit and other modes↗2024-05-16
📋Vendor Advisories
1Debian▶
CVE-2023-46842: xen - Unlike 32-bit PV guests, HVM guests may switch freely between 64-bit and other m...↗2023