Red Hat Enterprise Linux 8.4 Extended Update Support update for kpatch-patch

1) Double Free

EUVDB-ID: #VU66397

Risk: Low

CVSSv4.0: 8.5 [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:A/U:Clear]

CVE-ID: CVE-2022-2588

CWE-ID: CWE-415 - Double Free

Exploit availability: Yes

Description

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

The vulnerability exists due to a double free error within the network packet scheduler implementation in the route4_change() function in Linux kernel when removing all references to a route filter before freeing it. A local user can run a specially crafted program to crash the kernel or execute arbitrary code.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kpatch-patch-4_18_0-305_49_1 (Red Hat package): 1-1.el8_4

kpatch-patch-4_18_0-305_45_1 (Red Hat package): 1-1.el8_4 - 1-2.el8_4

kpatch-patch-4_18_0-305_25_1 (Red Hat package): 1-2.el8_4 - 1-8.el8_4

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 8.4

Red Hat Enterprise Linux Server - TUS: 8.4

Red Hat Enterprise Linux for Power, little endian - Extended Update Support: 8.4

Red Hat Enterprise Linux Server - AUS: 8.4

Red Hat Enterprise Linux for x86_64 - Extended Update Support: 8.4

kpatch-patch-4_18_0-305_62_1 (Red Hat package): before 1-1.el8_4

kpatch-patch-4_18_0-305_57_1 (Red Hat package): before 1-1.el8_4

CPE2.3

• cpe:2.3:o:red_hat:kpatch-patch-4_18_0-305_49_1_redhat_package:1-1.el8_4:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:kpatch-patch-4_18_0-305_45_1_redhat_package:1-1.el8_4:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:kpatch-patch-4_18_0-305_45_1_redhat_package:1-2.el8_4:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:kpatch-patch-4_18_0-305_25_1_redhat_package:1-2.el8_4:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:kpatch-patch-4_18_0-305_25_1_redhat_package:1-4.el8_4:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:kpatch-patch-4_18_0-305_25_1_redhat_package:1-5.el8_4:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_for_ibm_power_le_-_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_tus:8.4:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_power_little_endian_-_extended_update_support:8.4:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_aus:8.4:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_x86_64_-_extended_update_support:8.4:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:kpatch-patch-4_18_0-305_62_1_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:kpatch-patch-4_18_0-305_57_1_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*

External links

https://access.redhat.com/errata/RHSA-2022:6978

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?

Yes. This vulnerability is being exploited in the wild.