CVE-2023-23586
published 2023-02-17CVE-2023-23586: Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process. timens_install calls…
PriorityP424medium5.5CVSS 3.1
AVLACLPRLUINSUCHINAN
EPSS
0.27%
19.0th percentile
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
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.14.6-1 (bookworm) | linux 5.14.6-1 (bookworm) |
| linux | linux_kernel | >= 0 < 5.10.162-1 | 5.10.162-1 |
| linux | linux_kernel | >= 0 < 5.14.6-1 | 5.14.6-1 |
| linux | linux_kernel | >= 0 < 5.14.6-1 | 5.14.6-1 |
| linux | linux_kernel | >= 0 < 5.14.6-1 | 5.14.6-1 |
| linux | linux_kernel | >= 5.6 < 5.10.161 | 5.10.161 |
| linux | linux_kernel | 5.6 – 5.10.161 | — |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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Red Hat
kernel: io_uring: read use-after-free can lead to kernel memory leak
vendor_redhat·2023-02-17·CVSS 5.5
CVE-2023-23586 [MEDIUM] CWE-416 kernel: io_uring: read use-after-free can lead to kernel memory leak
kernel: io_uring: read use-after-free can lead to kernel memory leak
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 788d
Debian
CVE-2023-23586: linux - Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel ...
vendor_debian·2023·CVSS 5.5
CVE-2023-23586 [MEDIUM] CVE-2023-23586: linux - Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel ...
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/li
OSV
CVE-2023-23586: Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process
osv·2023-02-17·CVSS 5.5
CVE-2023-23586 [MEDIUM] CVE-2023-23586: Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process
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/li
GHSA
GHSA-h86q-32m7-8f9v: Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process
ghsa_unreviewed·2023-02-17
CVE-2023-23586 [MEDIUM] CWE-416 GHSA-h86q-32m7-8f9v: Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process
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/li
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y&id=788d0824269bef539fe31a785b1517882eafed93https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y&id=788d0824269bef539fe31a785b1517882eafed93https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93
2023-02-17
Published