PT-2020-6738 · Linux+9 · Linux Kernel+9
Syzbot
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Published
2020-09-18
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Updated
2022-10-25
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CVE-2020-36385
CVSS v2.0
9.3
High
| Vector | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 5.10
Description
The issue is related to a use-after-free vulnerability in the Linux kernel, specifically in the drivers/infiniband/core/ucma.c component. This vulnerability allows a remote attacker to access confidential data, compromise its integrity, and cause a denial of service. The vulnerability occurs because the ctx is reached via the ctx list in some ucma migrate id situations where ucma close is called.
Recommendations
For Linux kernel versions prior to 5.10, update to version 5.10 or later to resolve the issue. As a temporary workaround, consider restricting access to the vulnerable ucma.c component to minimize the risk of exploitation. Avoid using the
ucma migrate id function in situations where ucma close is called until the issue is resolved.Fix
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Linux Kernel
Red Hat
Rocky Linux
Suse
Ubuntu