SUSE: CVE-2023-23586: SUSE Linux Security Advisory
Description
Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process. timens_install calls current_is_single_threaded to determine if the current process is single-threaded, but this call does not consider io_uring's io_worker threads, thus it is possible to insert a time namespace's vvar page to process's memory space via a page fault. When this time namespace is destroyed, the vvar page is also freed, but not removed from the process' memory, and a next page allocated by the kernel will be still available from the user-space process and can leak memory contents via this (read-only) use-after-free vulnerability. We recommend upgrading past version 5.10.161 or commit 788d0824269bef539fe31a785b1517882eafed93 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring
Solution(s)
- suse-upgrade-dtb-al
- suse-upgrade-dtb-zte
- suse-upgrade-kernel-64kb
- suse-upgrade-kernel-64kb-devel
- suse-upgrade-kernel-default
- suse-upgrade-kernel-default-base
- suse-upgrade-kernel-default-devel
- suse-upgrade-kernel-devel
- suse-upgrade-kernel-docs
- suse-upgrade-kernel-macros
- suse-upgrade-kernel-obs-build
- suse-upgrade-kernel-preempt
- suse-upgrade-kernel-preempt-devel
- suse-upgrade-kernel-source
- suse-upgrade-kernel-syms
- suse-upgrade-kernel-zfcpdump
- suse-upgrade-reiserfs-kmp-default
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- Real Risk Prioritization
- IT-Integrated Remediation Projects
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- Integrated Threat Feeds
- Easy-to-Use RESTful API
- Automation-Assisted Patching
- Automated Containment
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