Red Hat Enterprise Linux 8.2 Telecommunications Update Service update for kernel-rt
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2022-42896 CVE-2023-4128 |
| CWE-ID | CWE-416 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software |
Red Hat Enterprise Linux for Real Time - Telecommunications Update Service Operating systems & Components / Operating system 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 2 vulnerabilities.
1) Use-after-free
EUVDB-ID: #VU69795
Risk: Low
CVSSv4.0: 4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2022-42896
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe 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.
Red Hat Enterprise Linux for Real Time - Telecommunications Update Service: 8.2
kernel-rt (Red Hat package): before 4.18.0-193.116.1.rt13.167.el8_2
CPE2.3- cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_real_time_-_telecommunications_update_service:8.2:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:kernel-rt_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
https://access.redhat.com/errata/RHSA-2023:5588
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.
2) Use-after-free
EUVDB-ID: #VU79486
Risk: Low
CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2023-4128
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in the Linux Kernel. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
Install updates from vendor's website.
Red Hat Enterprise Linux for Real Time - Telecommunications Update Service: 8.2
kernel-rt (Red Hat package): before 4.18.0-193.116.1.rt13.167.el8_2
CPE2.3- cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_real_time_-_telecommunications_update_service:8.2:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:kernel-rt_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
https://access.redhat.com/errata/RHSA-2023:5588
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.
