CVE-2023-52434

2024-02-2109:39:37

redhat.com

access.redhat.com

linux kernel

smb client

out-of-bounds error

smb2_parse_contexts()

mitigate

cifs module

8 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

6.3 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

5.1%

JSON

A flaw was found in the smb client in the Linux kernel. A potential out-of-bounds error was seen in the smb2_parse_contexts() function. Validate offsets and lengths before dereferencing create contexts in smb2_parse_contexts().

Mitigation

To mitigate this issue, prevent module cifs from being loaded. Please see <https://access.redhat.com/solutions/41278> for how to blacklist a kernel module to prevent it from loading automatically.