PT-2021-12035 · Linux+1 · Linux Kernel+1

Syzbot · Published 2020-08-19 · Updated 2023-02-24 · CVE-2020-36387

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 5.8.2

Description: An issue was discovered related to a use-after-free in the Linux kernel, specifically in fs/io uring.c, involving io async task func and ctx reference holding.

Recommendations: For Linux kernel versions prior to 5.8.2, update to version 5.8.2 or later to resolve the issue.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALT-PU-2020-2615

ALT-PU-2020-2695

ALT-PU-2020-2710

ALT-PU-2020-2716

ALT-PU-2021-1105

CVE-2020-36387

OESA-2021-1279

Affected Products

Alt Linux

Linux Kernel

References · 28

• https://nvd.nist.gov/vuln/detail/CVE-2021-34693 · Security Note
• https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-io_async_task_func · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-35039 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-3573 · Security Note
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6d816e088c359866f9867057e04f244c608c42fe · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-36387 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-22555 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-0129 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-36387 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-36387 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-36387 · Security Note
• https://osv.dev/vulnerability/CVE-2020-36387 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2021-1279 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-36385 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-28097 · Security Note