PT-2024-11175 · Linux · Linux Kernel

CVE-2021-47123 · Published 2021-05-14 · Updated 2025-01-14

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 (affected versions not specified)

Description The issue is related to a double free on completion race in the io uring component of the Linux kernel. Specifically, it involves the io link timeout fn() function and the removal of linked timeouts from the master request link list to prevent use-after-free conditions.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Use After Free

Double Free

Weakness Enumeration

CWE-416

CWE-415

Related Identifiers

BDU:2025-07278

CVE-2021-47123

OESA-2024-1567

Affected Products

Linux Kernel

References · 34

• https://nvd.nist.gov/vuln/detail/CVE-2023-52609 · Security Note
• https://cve.org/CVERecord?id=CVE-2021-47123 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-26641 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-52612 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47217 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-26635 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47201 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-52477 · Security Note
• https://bdu.fstec.ru/vul/2025-07278 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-26636 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-26752 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-46929 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-26640 · Security Note
• https://git.kernel.org/stable/c/1f64f5e903b9d1d157875721e02adadc9d6f0a5d · Patch
• https://osv.dev/vulnerability/OESA-2024-1567 · Vendor Advisory