CVE-2024-35855

CVE Details

Release Date:

2024-05-17

Description

In the Linux kernel, the following vulnerability has been resolved:\nmlxsw: spectrum_acl_tcam: Fix possible use-after-free during activity update\nThe rule activity update delayed work periodically traverses the list of\nconfigured rules and queries their activity from the device.\nAs part of this task it accesses the entry pointed by 'ventry->entry',\nbut this entry can be changed concurrently by the rehash delayed work,\nleading to a use-after-free [1].\nFix by closing the race and perform the activity query under the\n'vregion->lock' mutex.\n[1]\nBUG: KASAN: slab-use-after-free in mlxsw_sp_acl_tcam_flower_rule_activity_get+0x121/0x140\nRead of size 8 at addr ffff8881054ed808 by task kworker/0:18/181\nCPU: 0 PID: 181 Comm: kworker/0:18 Not tainted 6.9.0-rc2-custom-00781-gd5ab772d32f7 #2\nHardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019\nWorkqueue: mlxsw_core mlxsw_sp_acl_rule_activity_update_work\nCall Trace:\n\ndump_stack_lvl+0xc6/0x120\nprint_report+0xce/0x670\nkasan_report+0xd7/0x110\nmlxsw_sp_acl_tcam_flower_rule_activity_get+0x121/0x140\nmlxsw_sp_acl_rule_activity_update_work+0x219/0x400\nprocess_one_work+0x8eb/0x19b0\nworker_thread+0x6c9/0xf70\nkthread+0x2c9/0x3b0\nret_from_fork+0x4d/0x80\nret_from_fork_asm+0x1a/0x30\n\nAllocated by task 1039:\nkasan_save_stack+0x33/0x60\nkasan_save_track+0x14/0x30\n__kasan_kmalloc+0x8f/0xa0\n__kmalloc+0x19c/0x360\nmlxsw_sp_acl_tcam_entry_create+0x7b/0x1f0\nmlxsw_sp_acl_tcam_vchunk_migrate_all+0x30d/0xb50\nmlxsw_sp_acl_tcam_vregion_rehash_work+0x157/0x1300\nprocess_one_work+0x8eb/0x19b0\nworker_thread+0x6c9/0xf70\nkthread+0x2c9/0x3b0\nret_from_fork+0x4d/0x80\nret_from_fork_asm+0x1a/0x30\nFreed by task 1039:\nkasan_save_stack+0x33/0x60\nkasan_save_track+0x14/0x30\nkasan_save_free_info+0x3b/0x60\npoison_slab_object+0x102/0x170\n__kasan_slab_free+0x14/0x30\nkfree+0xc1/0x290\nmlxsw_sp_acl_tcam_vchunk_migrate_all+0x3d7/0xb50\nmlxsw_sp_acl_tcam_vregion_rehash_work+0x157/0x1300\nprocess_one_work+0x8eb/0x19b0\nworker_thread+0x6c9/0xf70\nkthread+0x2c9/0x3b0\nret_from_fork+0x4d/0x80\nret_from_fork_asm+0x1a/0x30

See more information about CVE-2024-35855 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-2024-4211	2024-07-02
Oracle Linux version 9 (kernel)	ELSA-2024-9315	2024-11-14