Risk | Low |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-22543 |
CWE-ID | CWE-119 |
Exploitation vector | Local |
Public exploit | Public exploit code for vulnerability #1 is available. |
Vulnerable software Subscribe |
kernel (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) Operating systems & Components / Operating system Red Hat Enterprise Linux Server - Extended Life Cycle Support Operating systems & Components / Operating system |
Vendor | Red Hat Inc. |
This security bulletin contains one low risk vulnerability.
EUVDB-ID: #VU56018
Risk: Low
CVSSv3.1:
CVE-ID: CVE-2021-22543
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in Linux kernel when handling VM_IO|VM_PFNMAP vmas in KVM. A local user can can bypass RO checks and cause the pages to get freed while still accessible by the VMM and guest. As a result, an attacker with the ability to start and control a VM to read/write random pages of memory, can trigger memory corruption and execute arbitrary code with elevated privileges.
Install updates from vendor's website.
kernel (Red Hat package): 2.6.32-71.7.1.el6 - 2.6.32-754.47.1.el6
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems): 6.0
Red Hat Enterprise Linux Server - Extended Life Cycle Support: 6.0
http://access.redhat.com/errata/RHSA-2022:5640
Can this vulnerability be exploited remotely?
Is there known malware, which exploits this vulnerability?