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ubuntucveUbuntu.comUB:CVE-2023-0266
HistoryJan 30, 2023 - 12:00 a.m.

CVE-2023-0266

2023-01-3000:00:00
ubuntu.com
ubuntu.com
132

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

4.3 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:S/C:P/I:P/A:P

0.001 Low

EPSS

Percentile

40.1%

JSON

A use after free vulnerability exists in the ALSA PCM package in the Linux
Kernel. SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be
used in a use-after-free that can result in a priviledge escalation to gain
ring0 access from the system user. We recommend upgrading past commit
56b88b50565cd8b946a2d00b0c83927b7ebb055e

Notes

Author Note
sbeattie the fix commit claims that the issues is only present in 5.13 and newer, but it’s not clear why, from both the history of the snd_ctl_elem_read() path and the compat path.
rodrigo-zaiden USN-5975-1 first publication included esm/xenial linux-gcp version 4.15.0-1146.162~16.04.1 by mistake, it got fixed in version 4.15.0-1147.163~16.04.1 as published in USN-6009-1.
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-208.220UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-144.161UNKNOWN
ubuntu22.04noarchlinux< 5.15.0-69.76UNKNOWN
ubuntu22.10noarchlinux< 5.19.0-38.39UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1153.166UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1097.105UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1033.37UNKNOWN
ubuntu22.10noarchlinux-aws< 5.19.0-1022.23UNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1033.37~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1097.105~18.04.1UNKNOWN
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7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

4.3 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:S/C:P/I:P/A:P

0.001 Low

EPSS

Percentile

40.1%

JSON
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