CVE-2023-38427

2023-07-1800:00:00

ubuntu.com

linux kernel

integer underflow

out-of-bounds read

ksmbd

bugzilla

redhat

suse

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.002

Percentile

52.3%

JSON

An issue was discovered in the Linux kernel before 6.3.8.
fs/smb/server/smb2pdu.c in ksmbd has an integer underflow and out-of-bounds
read in deassemble_neg_contexts.

Bugs

Notes

Author	Note
rodrigo-zaiden	needs ksmbd-tools installed to enable the service, which is not installed by default.

OSVersionArchitecturePackageVersionFilename
ubuntu22.04noarchlinux< 5.15.0-102.112UNKNOWN
ubuntu23.04noarchlinux< 6.2.0-34.34UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1057.63UNKNOWN
ubuntu23.04noarchlinux-aws< 6.2.0-1013.13UNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1057.63~20.04.1UNKNOWN
ubuntu22.04noarchlinux-aws-6.2< 6.2.0-1013.13~22.04.1UNKNOWN
ubuntu22.04noarchlinux-azure< 5.15.0-1060.69UNKNOWN
ubuntu23.04noarchlinux-azure< 6.2.0-1014.14UNKNOWN
ubuntu20.04noarchlinux-azure-5.15< 5.15.0-1060.69~20.04.1UNKNOWN
ubuntu22.04noarchlinux-azure-6.2< 6.2.0-1014.14~22.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	22.04	noarch	linux	< 5.15.0-102.112	UNKNOWN
ubuntu	23.04	noarch	linux	< 6.2.0-34.34	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1057.63	UNKNOWN
ubuntu	23.04	noarch	linux-aws	< 6.2.0-1013.13	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1057.63~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-aws-6.2	< 6.2.0-1013.13~22.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-azure	< 5.15.0-1060.69	UNKNOWN
ubuntu	23.04	noarch	linux-azure	< 6.2.0-1014.14	UNKNOWN
ubuntu	20.04	noarch	linux-azure-5.15	< 5.15.0-1060.69~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-azure-6.2	< 6.2.0-1014.14~22.04.1	UNKNOWN