CVE-2024-26878

CVE Details

Release Date:

2024-04-17

Description

In the Linux kernel, the following vulnerability has been resolved:\nquota: Fix potential NULL pointer dereference\nBelow race may cause NULL pointer dereference\nP1P2\ndquot_free_inodequota_off\ndrop_dquot_ref\nremove_dquot_ref\ndquots = i_dquot(inode)\ndquots = i_dquot(inode)\nsrcu_read_lock\ndquots[cnt]) != NULL (1)\ndquots[type] = NULL (2)\nspin_lock(&dquots[cnt]->dq_dqb_lock) (3)\n....\nIf dquot_free_inode(or other routines) checks inode's quota pointers (1)\nbefore quota_off sets it to NULL(2) and use it (3) after that, NULL pointer\ndereference will be triggered.\nSo let's fix it by using a temporary pointer to avoid this issue.

See more information about CVE-2024-26878 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	5.5	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (kernel)	ELSA-2024-5101	2024-08-08
Oracle Linux version 9 (kernel)	ELSA-2024-9315	2024-11-14