SUSE update for the Linux Kernel (Live Patch 0 for SLE 15 SP3)
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2021-31440 CVE-2021-3573 CVE-2021-3640 |
| CWE-ID | CWE-682 CWE-416 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software |
SUSE Linux Enterprise Module for Live Patching Operating systems & Components / Operating system kernel-livepatch-SLE15-SP3_Update_0-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-57-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-57-default Operating systems & Components / Operating system package or component |
| Vendor | SUSE |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Incorrect calculation
EUVDB-ID: #VU64201
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-2021-31440
CWE-ID:
CWE-682 - Incorrect Calculation
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to out-of-bounds access flaw in the Linux kernel’s implementation of the eBPF code verifier, where an incorrect register bounds calculation while checking unsigned 32-bit instructions in an eBPF program occurs. A local user can use this flaw to crash the system or possibly escalate their privileges on the system.
MitigationUpdate the affected package the Linux Kernel (Live Patch 0 for SLE 15 SP3) to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Module for Live Patching: 15-SP3
kernel-livepatch-SLE15-SP3_Update_0-debugsource: before 7-3.1
kernel-livepatch-5_3_18-57-default-debuginfo: before 7-3.1
kernel-livepatch-5_3_18-57-default: before 7-3.1
CPE2.3- cpe:2.3:o:suse:suse_linux_enterprise_module_for_live_patching:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:a:suse:kernel-livepatch-sle15-sp3_update_0-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:kernel-livepatch-5_3_18-57-default-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:kernel-livepatch-5_3_18-57-default:*:*:*:*:*:suse_linux:*:*
https://www.suse.com/support/update/announcement/2021/suse-su-20213360-1/
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: #VU63662
Risk: Low
CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-3573
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows local user to escalate their privileges on the system.
The vulnerability exists due to a use-after-free in hci_sock_bound_ioctl() function of the Linux kernel HCI subsystem triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user can use this flaw to crash the system or escalate privileges on the system.
MitigationUpdate the affected package the Linux Kernel (Live Patch 0 for SLE 15 SP3) to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Module for Live Patching: 15-SP3
kernel-livepatch-SLE15-SP3_Update_0-debugsource: before 7-3.1
kernel-livepatch-5_3_18-57-default-debuginfo: before 7-3.1
kernel-livepatch-5_3_18-57-default: before 7-3.1
CPE2.3- cpe:2.3:o:suse:suse_linux_enterprise_module_for_live_patching:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:a:suse:kernel-livepatch-sle15-sp3_update_0-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:kernel-livepatch-5_3_18-57-default-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:kernel-livepatch-5_3_18-57-default:*:*:*:*:*:suse_linux:*:*
https://www.suse.com/support/update/announcement/2021/suse-su-20213360-1/
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.
3) Use-after-free
EUVDB-ID: #VU63769
Risk: Low
CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-3640
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 in sco_sock_sendmsg() function of the Linux kernel HCI subsystem. A privileged local user can call ioct UFFDIO_REGISTER or other way trigger race condition to escalate privileges on the system.
MitigationUpdate the affected package the Linux Kernel (Live Patch 0 for SLE 15 SP3) to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Module for Live Patching: 15-SP3
kernel-livepatch-SLE15-SP3_Update_0-debugsource: before 7-3.1
kernel-livepatch-5_3_18-57-default-debuginfo: before 7-3.1
kernel-livepatch-5_3_18-57-default: before 7-3.1
CPE2.3- cpe:2.3:o:suse:suse_linux_enterprise_module_for_live_patching:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:a:suse:kernel-livepatch-sle15-sp3_update_0-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:kernel-livepatch-5_3_18-57-default-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:kernel-livepatch-5_3_18-57-default:*:*:*:*:*:suse_linux:*:*
https://www.suse.com/support/update/announcement/2021/suse-su-20213360-1/
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.
