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CVE-2020-29534

Status Candidate

Overview

An issue was discovered in the Linux kernel before 5.9.3. io_uring takes a non-refcounted reference to the files_struct of the process that submitted a request, causing execve() to incorrectly optimize unshare_fd(), aka CID-0f2122045b94.

Related Files

Ubuntu Security Notice USN-4678-1
Posted Jan 6, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4678-1 - It was discovered that the AMD Running Average Power Limit driver in the Linux kernel did not properly restrict access to power data. A local attacker could possibly use this to expose sensitive information. Jann Horn discovered that the io_uring subsystem in the Linux kernel did not properly perform reference counting in some situations. A local attacker could use this to expose sensitive information or possibly escalate privileges. Various other issues were also addressed.

tags | advisory, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-12912, CVE-2020-29534
MD5 | b3036de92a3edb42e7057a8095180d7c
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