CVE-2020-36385: Use After Free
An issue was discovered in the Linux kernel before 5.10. drivers/infiniband/core/ucma.c has a use-after-free because the ctx is reached via the ctxlist in some ucmamigrateid situations where ucmaclose is called, aka CID-f5449e74802c.
Other sources
An issue was discovered in the Linux kernels Userspace Connection Manager Access for RDMA. The UCMA has a use-after-free condition, when the end of ctx is reached via the ctxlist in some situations in ucmamigrateid where ucmaclose is called. This could allow a local attacker to crash the system when using a crafted attack.
External Reference:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f5449e74802c1112dea984aec8af7a33c4516af1
— Red Hat
An issue was discovered in the Linux kernels Userspace Connection Manager Access for RDMA. This could allow a local attacker to crash the system, corrupt memory or escalate privileges.
Affected Software
Remediation
Information
Event History
Parent advisories
This vulnerability appears in the following advisories.
Frequently Asked Questions
What is the severity of CVE-2020-36385?
CVE-2020-36385 has been identified with a severity level of high due to the potential for a use-after-free vulnerability in the Linux kernel.
How do I fix CVE-2020-36385?
To fix CVE-2020-36385, upgrade your Linux kernel to version 5.10 or later, or apply specific patched versions provided by your distribution.
Which Linux kernel versions are affected by CVE-2020-36385?
CVE-2020-36385 affects Linux kernel versions prior to 5.10, including various versions in the Red Hat kernel series.
What is the potential impact of exploiting CVE-2020-36385?
Exploiting CVE-2020-36385 may allow an attacker to execute arbitrary code in the context of the kernel, leading to system compromise.
Is there a workaround for CVE-2020-36385 if I cannot immediately upgrade?
Currently, there are no known workarounds for CVE-2020-36385, so it is recommended to upgrade to a fixed version as soon as possible.