Detections
Analytics

CVE-2020-12657

high

Description

An issue was discovered in the Linux kernel before 5.6.5. There is a use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body.

References

https://usn.ubuntu.com/4369-1/

https://usn.ubuntu.com/4368-1/

https://usn.ubuntu.com/4367-1/

https://usn.ubuntu.com/4363-1/

https://github.com/torvalds/linux/commit/2f95fa5c955d0a9987ffdc3a095e2f4e62c5f2a9

http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html

https://security.netapp.com/advisory/ntap-20200608-0001/

https://patchwork.kernel.org/patch/11447049/

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2f95fa5c955d0a9987ffdc3a095e2f4e62c5f2a9

https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-4956

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5

Details

Source: Mitre, NVD

Published: 2020-05-05

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00118