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ubuntucveUbuntu.comUB:CVE-2023-6546
HistoryDec 21, 2023 - 12:00 a.m.

CVE-2023-6546

2023-12-2100:00:00
ubuntu.com
ubuntu.com
35
race condition
linux kernel
gsm 0710
tty multiplexor
local privilege escalation

CVSS3

7

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

6.8

Confidence

High

EPSS

0

Percentile

10.1%

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.

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CVSS3

7

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

6.8

Confidence

High

EPSS

0

Percentile

10.1%