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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2023-52597 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: fix setting of fpc register kvm_arch_vcpu_ioctl_set_fpu() allows to set the floating point control (fpc) register of a guest cpu. The new value is tested for validity by temporarily loading it into the fpc register. This may lead to corruption of the fpc register of the host process: if an interrupt happens while the value is temporarily loaded into the fpc register, and within interrupt context floating point or vector registers are used, the current fp/vx registers are saved with save_fpu_regs() assuming they belong to user space and will be loaded into fp/vx registers when returning to user space. test_fp_ctl() restores the original user space / host process fpc register value, however it will be discarded, when returning to user space. In result the host process will incorrectly continue to run with the value that was supposed to be used for a guest cpu. Fix this by simply removing the test. There is another test right before the SIE context is entered which will handles invalid values. This results in a change of behaviour: invalid values will now be accepted instead of that the ioctl fails with -EINVAL. This seems to be acceptable, given that this interface is most likely not used anymore, and this is in addition the same behaviour implemented with the memory mapped interface (replace invalid values with zero) - see sync_regs() in kvm-s390.c.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/0671f42a9c1084db10d68ac347d08dbf6689ecb3 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/150a3a3871490e8c454ffbac2e60abeafcecff99 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/2823db0010c400e4b2b12d02aa5d0d3ecb15d7c7 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/3a04410b0bc7e056e0843ac598825dd359246d18 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/5e63c9ae8055109d805aacdaf2a4fe2c3b371ba1 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/732a3bea7aba5b15026ea42d14953c3425cc7dc2 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/b988b1bb0053c0dcd26187d29ef07566a565cf55 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/c87d7d910775a025e230fd6359b60627e392460f CVE, kernel.org Patch 
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html CVE Mailing List 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

8 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-52597
NVD Published Date:
03/06/2024
NVD Last Modified:
03/14/2025
Source:
kernel.org