CVE-2023-23586

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Source
https://cve.org/CVERecord?id=CVE-2023-23586
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-23586.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2023-23586
Downstream
Related
Published
2023-02-17T13:15:10.737Z
Modified
2026-03-14T11:58:33.609673Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
[none]
Details

Due to a vulnerability in the iouring subsystem, it is possible to leak kernel memory information to the user process. timensinstall calls currentissinglethreaded to determine if the current process is single-threaded, but this call does not consider iouring's ioworker 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/iouring

References

Affected packages

Git /

Affected ranges

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-23586.json"
unresolved_ranges 
[
    {
        "events": [
            {
                "introduced": "5.6"
            },
            {
                "fixed": "5.10.161"
            }
        ]
    }
]