CVE-2023-31084

2023-04-2400:00:00

ubuntu.com

linux kernel

dvb_frontend.c

blocking operation

vulnerability

bugzilla

unix

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

Percentile

14.6%

JSON

An issue was discovered in drivers/media/dvb-core/dvb_frontend.c in the
Linux kernel 6.2. There is a blocking operation when a task is in
!TASK_RUNNING. In dvb_frontend_get_event, wait_event_interruptible is
called; the condition is dvb_frontend_test_event(fepriv,events). In
dvb_frontend_test_event, down(&fepriv->sem) is called. However,
wait_event_interruptible would put the process to sleep, and
down(&fepriv->sem) may block the process.

Bugs

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-216.227UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-162.179UNKNOWN
ubuntu22.04noarchlinux< 5.15.0-83.92UNKNOWN
ubuntu23.04noarchlinux< 6.2.0-32.32UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-244.278UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1160.173UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1109.118UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1044.49UNKNOWN
ubuntu23.04noarchlinux-aws< 6.2.0-1011.11UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1122.128UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-216.227	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-162.179	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-83.92	UNKNOWN
ubuntu	23.04	noarch	linux	< 6.2.0-32.32	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-244.278	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1160.173	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1109.118	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1044.49	UNKNOWN
ubuntu	23.04	noarch	linux-aws	< 6.2.0-1011.11	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< 4.4.0-1122.128	UNKNOWN