Executive Summary

Informations
Name CVE-2024-46796 First vendor Publication 2024-09-18
Vendor Cve Last vendor Modification 2024-09-20

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 7.8
Base Score 7.8 Environmental Score 7.8
impact SubScore 5.9 Temporal Score 7.8
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix double put of @cfile in smb2_set_path_size()

If smb2_compound_op() is called with a valid @cfile and returned -EINVAL, we need to call cifs_get_writable_path() before retrying it as the reference of @cfile was already dropped by previous call.

This fixes the following KASAN splat when running fstests generic/013 against Windows Server 2022:

CIFS: Attempting to mount //w22-fs0/scratch
run fstests generic/013 at 2024-09-02 19:48:59
==================================================================
BUG: KASAN: slab-use-after-free in detach_if_pending+0xab/0x200
Write of size 8 at addr ffff88811f1a3730 by task kworker/3:2/176

CPU: 3 UID: 0 PID: 176 Comm: kworker/3:2 Not tainted 6.11.0-rc6 #2
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40
04/01/2014
Workqueue: cifsoplockd cifs_oplock_break [cifs]
Call Trace:

dump_stack_lvl+0x5d/0x80
? detach_if_pending+0xab/0x200
print_report+0x156/0x4d9
? detach_if_pending+0xab/0x200
? __virt_addr_valid+0x145/0x300
? __phys_addr+0x46/0x90
? detach_if_pending+0xab/0x200
kasan_report+0xda/0x110
? detach_if_pending+0xab/0x200
detach_if_pending+0xab/0x200
timer_delete+0x96/0xe0
? __pfx_timer_delete+0x10/0x10
? rcu_is_watching+0x20/0x50
try_to_grab_pending+0x46/0x3b0
__cancel_work+0x89/0x1b0
? __pfx___cancel_work+0x10/0x10
? kasan_save_track+0x14/0x30
cifs_close_deferred_file+0x110/0x2c0 [cifs]
? __pfx_cifs_close_deferred_file+0x10/0x10 [cifs]
? __pfx_down_read+0x10/0x10
cifs_oplock_break+0x4c1/0xa50 [cifs]
? __pfx_cifs_oplock_break+0x10/0x10 [cifs]
? lock_is_held_type+0x85/0xf0
? mark_held_locks+0x1a/0x90
process_one_work+0x4c6/0x9f0
? find_held_lock+0x8a/0xa0
? __pfx_process_one_work+0x10/0x10
? lock_acquired+0x220/0x550
? __list_add_valid_or_report+0x37/0x100
worker_thread+0x2e4/0x570
? __kthread_parkme+0xd1/0xf0
? __pfx_worker_thread+0x10/0x10
kthread+0x17f/0x1c0
? kthread+0xda/0x1c0
? __pfx_kthread+0x10/0x10
ret_from_fork+0x31/0x60
? __pfx_kthread+0x10/0x10
ret_from_fork_asm+0x1a/0x30

Allocated by task 1118:
kasan_save_stack+0x30/0x50
kasan_save_track+0x14/0x30
__kasan_kmalloc+0xaa/0xb0
cifs_new_fileinfo+0xc8/0x9d0 [cifs]
cifs_atomic_open+0x467/0x770 [cifs]
lookup_open.isra.0+0x665/0x8b0
path_openat+0x4c3/0x1380
do_filp_open+0x167/0x270
do_sys_openat2+0x129/0x160
__x64_sys_creat+0xad/0xe0
do_syscall_64+0xbb/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 83:
kasan_save_stack+0x30/0x50
kasan_save_track+0x14/0x30
kasan_save_free_info+0x3b/0x70
poison_slab_object+0xe9/0x160
__kasan_slab_free+0x32/0x50
kfree+0xf2/0x300
process_one_work+0x4c6/0x9f0
worker_thread+0x2e4/0x570
kthread+0x17f/0x1c0
ret_from_fork+0x31/0x60
ret_from_fork_asm+0x1a/0x30

Last potentially related work creation:
kasan_save_stack+0x30/0x50
__kasan_record_aux_stack+0xad/0xc0
insert_work+0x29/0xe0
__queue_work+0x5ea/0x760
queue_work_on+0x6d/0x90
_cifsFileInfo_put+0x3f6/0x770 [cifs]
smb2_compound_op+0x911/0x3940 [cifs]
smb2_set_path_size+0x228/0x270 [cifs]
cifs_set_file_size+0x197/0x460 [cifs]
cifs_setattr+0xd9c/0x14b0 [cifs]
notify_change+0x4e3/0x740
do_truncate+0xfa/0x180
vfs_truncate+0x195/0x200
__x64_sys_truncate+0x109/0x150
do_syscall_64+0xbb/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-46796

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-416 Use After Free

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 8
Os 3676

Sources (Detail)

https://git.kernel.org/stable/c/5a72d1edb0843e4c927a4096f81e631031c25c28
https://git.kernel.org/stable/c/762099898309218b4a7954f3d49e985dc4dfd638
https://git.kernel.org/stable/c/f9c169b51b6ce20394594ef674d6b10efba31220
Source Url

Alert History

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  • First insertion