CVE-2023-23586
Summary
| CVE | CVE-2023-23586 |
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| State | PUBLIC |
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| Assigner | [email protected] |
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| Source Priority | CVE Program / NVD first with legacy fallback |
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| Published | 2023-02-17 13:15:00 UTC |
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| Updated | 2023-11-07 04:07:00 UTC |
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| 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 |
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NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
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| Operating System |
Linux |
Linux Kernel |
All |
All |
All |
All |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 181575 Debian Security Update for linux (CVE-2023-23586)
- 181618 Debian Security Update for linux-5.10 (DLA 3349-1)
- 673121 EulerOS Security Update for kernel (EulerOS-SA-2023-2296)
- 673157 EulerOS Security Update for kernel (EulerOS-SA-2023-2272)
- 754120 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:2611-1)
- 754145 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:2651-1)
