This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

No data.

No data.

No data.

References
Link Providers
https://lore.kernel.org/linux-cve-announce/2025022710-CVE-2025-21818-27ee@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-21818 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-21818 cve-icon
History

Wed, 18 Jun 2025 16:00:00 +0000

Type Values Removed Values Added
Metrics threat_severity

Moderate

 threat_severity

None

Wed, 05 Mar 2025 04:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

 cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}

Sun, 02 Mar 2025 15:45:00 +0000

Type Values Removed Values Added
References

Sun, 02 Mar 2025 14:45:00 +0000

Type Values Removed Values Added
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. This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
Title x86/xen: fix xen_hypercall_hvm() to not clobber %rbx kernel: x86/xen: fix xen_hypercall_hvm() to not clobber %rbx

Fri, 28 Feb 2025 14:45:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Thu, 27 Feb 2025 20:15:00 +0000

Type Values Removed Values Added
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.
Title x86/xen: fix xen_hypercall_hvm() to not clobber %rbx
References
cve-icon MITRE

Status: REJECTED

Assigner: Linux

Published: 2025-02-27T20:04:16.619Z

Updated: 2025-03-02T14:26:37.856Z

Reserved: 2024-12-29T08:45:45.774Z

Link: CVE-2025-21818

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Rejected

Published: 2025-02-27T20:16:04.330

Modified: 2025-03-02T15:15:12.043

Link: CVE-2025-21818

cve-icon Redhat

Severity :

Publid Date: 2025-02-27T00:00:00Z

Links: CVE-2025-21818 - Bugzilla