CVE-2024-26786

CVE Details

Release Date:

2024-04-04

Description

In the Linux kernel, the following vulnerability has been resolved:\niommufd: Fix iopt_access_list_id overwrite bug\nSyzkaller reported the following WARN_ON:\nWARNING: CPU: 1 PID: 4738 at drivers/iommu/iommufd/io_pagetable.c:1360\nCall Trace:\niommufd_access_change_ioas+0x2fe/0x4e0\niommufd_access_destroy_object+0x50/0xb0\niommufd_object_remove+0x2a3/0x490\niommufd_object_destroy_user\niommufd_access_destroy+0x71/0xb0\niommufd_test_staccess_release+0x89/0xd0\n__fput+0x272/0xb50\n__fput_sync+0x4b/0x60\n__do_sys_close\n__se_sys_close\n__x64_sys_close+0x8b/0x110\ndo_syscall_x64\nThe mismatch between the access pointer in the list and the passed-in\npointer is resulting from an overwrite of access->iopt_access_list_id, in\niopt_add_access(). Called from iommufd_access_change_ioas() when\nxa_alloc() succeeds but iopt_calculate_iova_alignment() fails.\nAdd a new_id in iopt_add_access() and only update iopt_access_list_id when\nreturning successfully.

See more information about CVE-2024-26786 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 9 (kernel)	ELSA-2024-9315	2024-11-14