https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 29 Sep 2026 07:52:21 +0000 https://vulnerability.circl.lu/vuln/cve-2023-23586 <p><strong>Affected:</strong> Linux Kernel</p> <p>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&#39;s io_worker threads, thus it is possible to insert a time namespace&#39;s vvar page to process&#39;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&#39; 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</p> <p><strong>Affected:</strong> Linux Kernel</p> <p>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&#39;s io_worker threads, thus it is possible to insert a time namespace&#39;s vvar page to process&#39;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&#39; 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</p> https://vulnerability.circl.lu/vuln/cve-2023-23586