CVE-2020-36312

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-07 · updated 2026-06-17
Weakness: CWE-401

Description

An issue was discovered in the Linux kernel before 5.8.10. virt/kvm/kvm_main.c has a kvm_io_bus_unregister_dev memory leak upon a kmalloc failure, aka CID-f65886606c2d.

Affected products

Linux kernel: before 5.8.10 — fixed in 5.8.10

How to fix

Upgrade to a fixed version: Linux kernel 5.8.10. Check the vendor advisory for mitigations.

References

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.10
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f65886606c2d3b562716de030706dfe1bea4ed5e
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.10
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f65886606c2d3b562716de030706dfe1bea4ed5e

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