Vulnerabilities > CVE-2020-25220 - Use After Free vulnerability in Linux Kernel
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
The Linux kernel 4.9.x before 4.9.233, 4.14.x before 4.14.194, and 4.19.x before 4.19.140 has a use-after-free because skcd->no_refcnt was not considered during a backport of a CVE-2020-14356 patch. This is related to the cgroups feature.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.194
- https://bugzilla.redhat.com/show_bug.cgi?id=1868453
- https://www.spinics.net/lists/stable/msg405099.html
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.233
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.140
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-4.14.y&id=82fd2138a5ffd7e0d4320cdb669e115ee976a26e
- https://security.netapp.com/advisory/ntap-20201001-0004/
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html