CVE-2023-4623 (High) detected in linuxlinux-4.19.292 - autoclosed

[mend-bolt-for-github[bot]]

CVE-2023-4623 - High Severity Vulnerability

Vulnerable Library - linuxlinux-4.19.292

The Linux Kernel

Library home page: https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/?wsslib=linux

Found in HEAD commit: 79f1f426ddbd9f9d5b8620a590e7f2364d5e4786

Found in base branch: master

Vulnerable Source Files (2)

/net/sched/sch_hfsc.c /net/sched/sch_hfsc.c

Vulnerability Details

A use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component can be exploited to achieve local privilege escalation. If a class with a link-sharing curve (i.e. with the HFSC_FSC flag set) has a parent without a link-sharing curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling pointer that can cause a use-after-free. We recommend upgrading past commit b3d26c5702c7d6c45456326e56d2ccf3f103e60f.

Publish Date: 2023-09-06

URL: CVE-2023-4623

CVSS 3 Score Details (7.8)

Base Score Metrics: - Exploitability Metrics: - Attack Vector: Local - Attack Complexity: Low - Privileges Required: Low - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: High - Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://www.linuxkernelcves.com/cves/CVE-2023-4623

Release Date: 2023-09-06

Fix Resolution: v4.14.327,v4.19.295,v5.4.257,v5.10.195,v5.15.132,v6.1.53,v6.4.16,v6.6-rc1

---

Step up your Open Source Security Game with Mend here

[mend-bolt-for-github[bot]]

:heavy_check_mark: This issue was automatically closed by Mend because the vulnerable library in the specific branch(es) was either marked as ignored or it is no longer part of the Mend inventory.

[mend-bolt-for-github[bot]]

:information_source: This issue was automatically re-opened by Mend because the vulnerable library in the specific branch(es) has been detected in the Mend inventory.