Red Hat Enterprise Linux 9.0 Extended Update Support update for kernel-rt

Published: 2023-07-20 | Updated: 2024-06-07

Risk	Low
Patch available	YES
Number of vulnerabilities	6
CVE-ID	CVE-2022-1016 CVE-2022-42703 CVE-2022-42896 CVE-2023-2002 CVE-2023-2124 CVE-2023-2235
CWE-ID	CWE-416 CWE-264 CWE-125
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #2 is available. Public exploit code for vulnerability #4 is available.
Vulnerable software	kernel-rt (Red Hat package) Operating systems & Components / Operating system package or component
Vendor	Red Hat Inc.

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU62028

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-1016

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a use-after-free error in net/netfilter/nf_tables_core.c:nft_do_chain in Linux kernel.. A local user can trigger a use-after-free error and gain access to sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel-rt (Red Hat package): before 5.14.0-70.64.1.rt21.135.el9_0

CPE2.3

cpe:2.3:o:red_hat:kernel-rt_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:

External links

http://access.redhat.com/errata/RHSA-2023:4138

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Use-after-free

EUVDB-ID: #VU69297

Risk: Low

CVSSv3.1: 5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2022-42703

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error within the mm/rmap.c in the Linux kernel, related to leaf anon_vma double reuse. A local user can trigger a use-after-free error and crash the kernel.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel-rt (Red Hat package): before 5.14.0-70.64.1.rt21.135.el9_0

CPE2.3

cpe:2.3:o:red_hat:kernel-rt_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:

External links

http://access.redhat.com/errata/RHSA-2023:4138

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

3) Use-after-free

EUVDB-ID: #VU69795

Risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-42896

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows an attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the l2cap_connect() and l2cap_le_connect_req() function in net/bluetooth/l2cap_core.c. An attacker with physical proximity to the affected device can trigger a use-after-free error and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel-rt (Red Hat package): before 5.14.0-70.64.1.rt21.135.el9_0

CPE2.3

cpe:2.3:o:red_hat:kernel-rt_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:

External links

http://access.redhat.com/errata/RHSA-2023:4138

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU75163

Risk: Low

CVSSv3.1: 4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2023-2002

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: Yes

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper permissions check in the Bluetooth subsystem when handling ioctl system calls of HCI sockets. A local user can acquire a trusted socket, leading to unauthorized execution of management commands.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel-rt (Red Hat package): before 5.14.0-70.64.1.rt21.135.el9_0

CPE2.3

cpe:2.3:o:red_hat:kernel-rt_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:

External links

http://access.redhat.com/errata/RHSA-2023:4138

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

5) Out-of-bounds read

EUVDB-ID: #VU75323

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-2124

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack..

The vulnerability exists due to a boundary condition within the XFS subsystem in Linux kernel. A local user can trigger an out-of-bounds read error and crash the kernel.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel-rt (Red Hat package): before 5.14.0-70.64.1.rt21.135.el9_0

CPE2.3

cpe:2.3:o:red_hat:kernel-rt_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:

External links

http://access.redhat.com/errata/RHSA-2023:4138

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Use-after-free

EUVDB-ID: #VU75997

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-2235

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in the Linux Kernel Performance Events system. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel-rt (Red Hat package): before 5.14.0-70.64.1.rt21.135.el9_0

CPE2.3

cpe:2.3:o:red_hat:kernel-rt_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:

External links

http://access.redhat.com/errata/RHSA-2023:4138

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.