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CVE-2022-26356

Description

Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak.

Risk Information

Base Score
5.6
MODERATE
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS Score
Exploitation Probability
0.049

Associated Vulnerability

VulnerabilityOS Platform
SUSE-SU-2022:1505-1(SUSE Linux Enterprise Server 12-SP5 ) xen-4.12.4_22-3.66.1.x86_64.rpmLinux
SUSE-SU-2022:1505-1(SUSE Linux Enterprise Server 12-SP5 ) xen-debugsource-4.12.4_22-3.66.1.x86_64.rpmLinux
SUSE-SU-2022:1505-1(SUSE Linux Enterprise Server 12-SP5 ) xen-doc-html-4.12.4_22-3.66.1.x86_64.rpmLinux
SUSE-SU-2022:1505-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-4.12.4_22-3.66.1.x86_64.rpmLinux
SUSE-SU-2022:1505-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-32bit-4.12.4_22-3.66.1.x86_64.rpmLinux
SUSE-SU-2022:1505-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-debuginfo-4.12.4_22-3.66.1.x86_64.rpmLinux
SUSE-SU-2022:1505-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-debuginfo-32bit-4.12.4_22-3.66.1.x86_64.rpmLinux
SUSE-SU-2022:1505-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-4.12.4_22-3.66.1.x86_64.rpmLinux
SUSE-SU-2022:1505-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-debuginfo-4.12.4_22-3.66.1.x86_64.rpmLinux
SUSE-SU-2022:1505-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-domU-4.12.4_22-3.66.1.x86_64.rpmLinux
SUSE-SU-2022:1505-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-domU-debuginfo-4.12.4_22-3.66.1.x86_64.rpmLinux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234