ALPINE-CVE-2023-46842

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2023-46842
Published: 16 May 2024, 14:15
Last modified:03 Dec 2025, 22:53

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.5 MEDIUM
3.1 (osv_alpine)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

16 May 2024, 14:15
Published
Vulnerability first disclosed
03 Dec 2025, 22:53
Last Modified
Vulnerability information updated

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 in 64-bit mode this further involves a certain amount of translation of the values. Unfortunately internal sanity checking of these translated values assumes high halves of registers to always be clear when invoking a hypercall. When this is found not to be the case, it triggers a consistency check in the hypervisor and causes a crash.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Affected Systems

  • alpine•xen

    < 4.16.6-r0 | < 4.16.6-r0 | < 4.17.4-r0 | < 4.18.2-r0 | < 4.18.2-r0 | < 4.18.2-r0 | < 4.18.2-r0 | < 4.18.2-r0

References (1)