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CVE-2023-52598 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: s390/ptrace: handle setting of fpc register correctly If the content of the floating point control (fpc) register of a traced process is modified with the ptrace interface 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 tracing 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 fpc register value, however it will be discarded, when returning to user space. In result the tracer will incorrectly continue to run with the value that was supposed to be used for the traced process. Fix this by saving fpu register contents with save_fpu_regs() before using test_fp_ctl().


Severity



CVSS 4.0 Severity and Metrics:

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


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://git.kernel.org/stable/c/02c6bbfb08bad78dd014e24c7b893723c15ec7a1
https://git.kernel.org/stable/c/28a1f492cb527f64593457a0a0f0d809b3f36c25
https://git.kernel.org/stable/c/6ccf904aac0292e1f6b1a1be6c407c414f7cf713
https://git.kernel.org/stable/c/6d0822f2cc9b153bf2df49a84599195a2e0d21a8
https://git.kernel.org/stable/c/7a4d6481fbdd661f9e40e95febb95e3dee82bad3
https://git.kernel.org/stable/c/856caf2730ea18cb39e95833719c02a02447dc0a
https://git.kernel.org/stable/c/8b13601d19c541158a6e18b278c00ba69ae37829
https://git.kernel.org/stable/c/bdce67df7f12fb0409fbc604ce7c4254703f56d4

Weakness Enumeration

CWE-ID CWE Name Source

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-52598
NVD Published Date:
03/06/2024
NVD Last Modified:
03/06/2024
Source:
kernel.org