CVE-2023-52806

2024-05-2100:00:00

ubuntu.com

cve-2023-52806

linux kernel

alsa

hda

null-ptr-deref

stream types

audiodsp drivers

coupled

code-loading

vulnerability

security

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

AI Score

7.4

Confidence

High

EPSS

Percentile

5.1%

JSON

In the Linux kernel, the following vulnerability has been resolved: ALSA:
hda: Fix possible null-ptr-deref when assigning a stream While AudioDSP
drivers assign streams exclusively of HOST or LINK type, nothing blocks a
user to attempt to assign a COUPLED stream. As supplied substream instance
may be a stub, what is the case when code-loading, such scenario ends with
null-ptr-deref.

Notes

Author	Note
sbeattie	for identifying the introducing the vulnerability, 14752412721c “ALSA: hda - Add the controller helper codes to hda-core module” (v4.2-rc1) is the raw result of git blaming sound/hda/hdac_stream.c, but, as its commit message states, it introduces duplicate code from the legacy driver; use the commit that introduced it in the legacy driver: d5cf99119882 “ALSA: hda - Distinguish each substream for better sticky assignment” (v3.2-rc1)

Author

Note

sbeattie

for identifying the introducing the vulnerability, 14752412721c “ALSA: hda - Add the controller helper codes to hda-core module” (v4.2-rc1) is the raw result of git blaming sound/hda/hdac_stream.c, but, as its commit message states, it introduces duplicate code from the legacy driver; use the commit that introduced it in the legacy driver: d5cf99119882 “ALSA: hda - Distinguish each substream for better sticky assignment” (v3.2-rc1)

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux< anyUNKNOWN
ubuntu22.04noarchlinux< anyUNKNOWN
ubuntu20.04noarchlinux-aws< anyUNKNOWN
ubuntu22.04noarchlinux-aws< anyUNKNOWN
ubuntu20.04noarchlinux-aws-5.15< anyUNKNOWN
ubuntu18.04noarchlinux-aws-5.4< anyUNKNOWN
ubuntu22.04noarchlinux-aws-6.5< anyUNKNOWN
ubuntu20.04noarchlinux-azure< anyUNKNOWN
ubuntu22.04noarchlinux-azure< anyUNKNOWN
ubuntu20.04noarchlinux-azure-5.15< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	linux	< any	UNKNOWN
ubuntu	22.04	noarch	linux	< any	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< any	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< any	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< any	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< any	UNKNOWN
ubuntu	22.04	noarch	linux-aws-6.5	< any	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< any	UNKNOWN
ubuntu	22.04	noarch	linux-azure	< any	UNKNOWN
ubuntu	20.04	noarch	linux-azure-5.15	< any	UNKNOWN