CVE-2025-21818 - Xen Linux XenPVH Guest Register Clobber Vulnerability
CVE ID : CVE-2025-21818 Published : Feb. 27, 2025, 8:16 p.m. | 1 hour, 44 minutes ago Description : In the Linux kernel, the following vulnerability has been resolved: x86/xen: fix xen_hypercall_hvm() to not clobber %rbx xen_hypercall_hvm(), which is used when running as a Xen PVH guest at most only once during early boot, is clobbering %rbx. Depending on whether the caller relies on %rbx to be preserved across the call or not, this clobbering might result in an early crash of the system. This can be avoided by using an already saved register instead of %rbx. Severity: 0.0 | NA Visit the link for more details, such as CVSS details, affected products, timeline, and more...
CVE ID : CVE-2025-21818
Published : Feb. 27, 2025, 8:16 p.m. | 1 hour, 44 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: x86/xen: fix xen_hypercall_hvm() to not clobber %rbx xen_hypercall_hvm(), which is used when running as a Xen PVH guest at most only once during early boot, is clobbering %rbx. Depending on whether the caller relies on %rbx to be preserved across the call or not, this clobbering might result in an early crash of the system. This can be avoided by using an already saved register instead of %rbx.
Severity: 0.0 | NA
Visit the link for more details, such as CVSS details, affected products, timeline, and more...
Published : Feb. 27, 2025, 8:16 p.m. | 1 hour, 44 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: x86/xen: fix xen_hypercall_hvm() to not clobber %rbx xen_hypercall_hvm(), which is used when running as a Xen PVH guest at most only once during early boot, is clobbering %rbx. Depending on whether the caller relies on %rbx to be preserved across the call or not, this clobbering might result in an early crash of the system. This can be avoided by using an already saved register instead of %rbx.
Severity: 0.0 | NA
Visit the link for more details, such as CVSS details, affected products, timeline, and more...
