Name | CVE-2023-23586 |
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 |
Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
References | DLA-3349-1 |
The table below lists information on source packages.
Source Package | Release | Version | Status |
---|---|---|---|
linux (PTS) | bullseye | 5.10.223-1 | fixed |
bullseye (security) | 5.10.226-1 | fixed | |
bookworm | 6.1.115-1 | fixed | |
bookworm (security) | 6.1.112-1 | fixed | |
trixie | 6.11.5-1 | fixed | |
sid | 6.11.7-1 | fixed |
The information below is based on the following data on fixed versions.
Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
---|---|---|---|---|---|---|
linux | source | buster | (not affected) | |||
linux | source | bullseye | 5.10.162-1 | |||
linux | source | (unstable) | 5.14.6-1 | |||
linux-5.10 | source | buster | 5.10.162-1~deb10u1 | DLA-3349-1 |
[buster] - linux <not-affected> (Vulnerable code not present)
https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93
Unclear if this is just a duplicate of CVE-2023-0240. Track it
as different for now. The only CVE record references available
are identical, but with different description of the issue.