CVE-2023-6546 — Race Condition within a Thread in Kernel

CWE-366 — Race Condition within a ThreadCWE-362 — Race ConditionCWE-416 — Use After Free9 documents8 sources
Severity
7.0HIGHNVD
EPSS
0.3%
top 44.14%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Linux KernelFedoraproject FedoraRedhat Enterprise Linux
Timeline
PublishedDec 21

Description

A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel. This issue occurs when two threads execute the GSMIOC_SETCONF ioctl on the same tty file descriptor with the gsm line discipline enabled, and can lead to a use-after-free problem on a struct gsm_dlci while restarting the gsm mux. This could allow a local unprivileged user to escalate their privileges on the system.

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.0 | Impact: 5.9

Affected Packages2 packages

▶NVDlinux/linux_kernel< 6.5+1
▶Debianlinux/linux_kernel< 5.10.197-1+3

Also affects: Enterprise Linux 8.0, 9.0, Fedora 39

Patches

Patch: bugzilla.redhat.com ↗Patch: github.com ↗Patch: bugzilla.redhat.com ↗

🔴Vulnerability Details

4
GHSA
GHSA-v727-f437-6cxx: A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel↗2023-12-21
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CVEList
Kernel: gsm multiplexing race condition leads to privilege escalation↗2023-12-21
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OSV
CVE-2023-6546: A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel↗2023-12-21
▶
OSV
libreoffice vulnerabilities↗2023-12-14
▶

📋Vendor Advisories

3
Red Hat
kernel: GSM multiplexing race condition leads to privilege escalation↗2023-12-21
▶
Microsoft
Kernel: gsm multiplexing race condition leads to privilege escalation↗2023-12-12
▶
Debian
CVE-2023-6546: linux - A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel. ...↗2023
▶

💬Community

1
Bugzilla
CVE-2023-6546 kernel: GSM multiplexing race condition leads to privilege escalation↗2023-12-21
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CVE-2023-6546 — Race Condition within a Thread | cvebase