CVE-2023-52598

HIGH
Published Mar 6, 2024 Modified Feb 14, 2025 CWE-125

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().

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CVSS v3.1 Score

7.1
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

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 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 https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html

Frequently Asked Questions

What is CVE-2023-52598? +
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(). It has a CVSS v3.1 base score of 7.1 (HIGH).
How severe is CVE-2023-52598? +
CVE-2023-52598 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2023-52598? +
CVE-2023-52598 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2023-52598? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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