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CVE-2023-52598

Status Candidate

Overview

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().

Related Files

Ubuntu Security Notice USN-6767-2
Posted May 14, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6767-2 - Chenyuan Yang discovered that the RDS Protocol implementation in the Linux kernel contained an out-of-bounds read vulnerability. An attacker could use this to possibly cause a denial of service. Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.

tags | advisory, denial of service, kernel, protocol
systems | linux, ubuntu
advisories | CVE-2023-52435, CVE-2023-52587, CVE-2023-52594, CVE-2023-52595, CVE-2023-52597, CVE-2023-52598, CVE-2023-52599, CVE-2023-52601, CVE-2023-52606, CVE-2023-52607, CVE-2023-52617, CVE-2023-52619, CVE-2024-23849, CVE-2024-26593
SHA-256 | 885350375e9760db30c910ea3c9badf280ffc608433042df8187d13fec7c9681
Ubuntu Security Notice USN-6767-1
Posted May 9, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6767-1 - Chenyuan Yang discovered that the RDS Protocol implementation in the Linux kernel contained an out-of-bounds read vulnerability. An attacker could use this to possibly cause a denial of service. Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.

tags | advisory, denial of service, kernel, protocol
systems | linux, ubuntu
advisories | CVE-2023-52435, CVE-2023-52587, CVE-2023-52594, CVE-2023-52595, CVE-2023-52597, CVE-2023-52598, CVE-2023-52599, CVE-2023-52601, CVE-2023-52606, CVE-2023-52607, CVE-2023-52617, CVE-2023-52619, CVE-2024-23849, CVE-2024-26593
SHA-256 | 339076a1f5711d55cd375ea187457dc3949b36b7d8631b134fc24a9b65866d7e
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