CVE-2023-3776

CVE Details

Release Date:	2023-07-06
Impact:	Important	What is this?

Description

A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability. We recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f.

See more information about CVE-2023-3776 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	7.0
Vector String:	CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Version:	3.0
Attack Vector:	Local
Attack Complexity:	High
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	High
Integrity Impact:	High
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (kernel)	ELSA-2024-1831	2024-04-22
Oracle Linux version 6 (kernel-uek)	ELSA-2023-12842	2023-10-03
Oracle Linux version 7 (kernel)	ELSA-2023-7423	2023-11-22
Oracle Linux version 7 (kernel-uek)	ELSA-2023-12842	2023-10-03
Oracle Linux version 8 (kernel)	ELSA-2023-5244	2023-09-21
Oracle Linux version 9 (kernel)	ELSA-2023-5069	2023-09-15
Oracle VM version 3 (kernel-uek)	OVMSA-2023-0023	2023-11-02