CVE-2020-36387

high

Description

An issue was discovered in the Linux kernel before 5.8.2. fs/io_uring.c has a use-after-free related to io_async_task_func and ctx reference holding, aka CID-6d816e088c35.

References

Advisories
More

https://syzkaller.appspot.com/bug?id=ce5f07d6ec3b5050b8f0728a3b389aa510f2591b

https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-io_async_task_func

https://security.netapp.com/advisory/ntap-20210727-0006/

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6d816e088c359866f9867057e04f244c608c42fe

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.2

Details

Source: Mitre, NVD

Published: 2021-06-07

Updated: 2023-02-24

Risk Information

CVSS v2

Base Score: 7.2

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

Severity: High

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H