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redhatcveRedhat.comRH:CVE-2022-48779
HistoryJul 16, 2024 - 10:57 p.m.

CVE-2022-48779

2024-07-1622:57:00
redhat.com
access.redhat.com
3
linux kernel
vulnerability
cve-2022-48779
resolved
net
mscc
ocelot
use-after-free
fix
ocelot_vlan_del
ocelot_vlan_member_del
struct
ocelot_bridge_vlan
port
pvid_vlan
memory
bug

CVSS3

7.8

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

AI Score

7

Confidence

Low

EPSS

0

Percentile

9.3%

In the Linux kernel, the following vulnerability has been resolved: net: mscc: ocelot: fix use-after-free in ocelot_vlan_del() ocelot_vlan_member_del() will free the struct ocelot_bridge_vlan, so if this is the same as the port’s pvid_vlan which we access afterwards, what we’re accessing is freed memory. Fix the bug by determining whether to clear ocelot_port->pvid_vlan prior to calling ocelot_vlan_member_del().

CVSS3

7.8

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

AI Score

7

Confidence

Low

EPSS

0

Percentile

9.3%