CVE-2022-3586

2022-10-1810:10:06

redhat.com

access.redhat.com

5.5 Medium

CVSS3

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

1.7 Low

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.0005 Low

EPSS

Percentile

14.6%

JSON

A flaw was found in the Linux kernel’s networking code. A use-after-free was found in the way the sch_sfb enqueue function used the socket buffer (SKB) cb field after the same SKB had been enqueued (and freed) into a child qdisc. This flaw allows a local, unprivileged user to to disclose sensitive information or crash the system, causing a denial of service.

Mitigation

To mitigate this issue, prevent module sch_sfb from being loaded. Please see <https://access.redhat.com/solutions/41278> for how to blacklist a kernel module to prevent it from loading automatically. If the sch_sfb module is enabled, then don't install sch_cake as a child qdisc of sch_sfb.