CVE-2025-38728

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

smb3: fix for slab out of bounds on mount to ksmbd

With KASAN enabled, it is possible to get a slab out of bounds

during mount to ksmbd due to missing check in parse_server_interfaces()

(see below):

BUG: KASAN: slab-out-of-bounds in

parse_server_interfaces+0x14ee/0x1880 [cifs]

Read of size 4 at addr ffff8881433dba98 by task mount/9827

CPU: 5 UID: 0 PID: 9827 Comm: mount Tainted: G

OE 6.16.0-rc2-kasan #2 PREEMPT(voluntary)

Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE

Hardware name: Dell Inc. Precision Tower 3620/0MWYPT,

BIOS 2.13.1 06/14/2019

Call Trace:

<TASK>

dump_stack_lvl+0x9f/0xf0

print_report+0xd1/0x670

__virt_addr_valid+0x22c/0x430

? parse_server_interfaces+0x14ee/0x1880 [cifs]

? kasan_complete_mode_report_info+0x2a/0x1f0

? parse_server_interfaces+0x14ee/0x1880 [cifs]

kasan_report+0xd6/0x110

parse_server_interfaces+0x14ee/0x1880 [cifs]

__asan_report_load_n_noabort+0x13/0x20

parse_server_interfaces+0x14ee/0x1880 [cifs]

? __pfx_parse_server_interfaces+0x10/0x10 [cifs]

? trace_hardirqs_on+0x51/0x60

SMB3_request_interfaces+0x1ad/0x3f0 [cifs]

? __pfx_SMB3_request_interfaces+0x10/0x10 [cifs]

? SMB2_tcon+0x23c/0x15d0 [cifs]

smb3_qfs_tcon+0x173/0x2b0 [cifs]

? __pfx_smb3_qfs_tcon+0x10/0x10 [cifs]

? cifs_get_tcon+0x105d/0x2120 [cifs]

? do_raw_spin_unlock+0x5d/0x200

? cifs_get_tcon+0x105d/0x2120 [cifs]

? __pfx_smb3_qfs_tcon+0x10/0x10 [cifs]

cifs_mount_get_tcon+0x369/0xb90 [cifs]

? dfs_cache_find+0xe7/0x150 [cifs]

dfs_mount_share+0x985/0x2970 [cifs]

? check_path.constprop.0+0x28/0x50

? save_trace+0x54/0x370

? __pfx_dfs_mount_share+0x10/0x10 [cifs]

? __lock_acquire+0xb82/0x2ba0

? __kasan_check_write+0x18/0x20

cifs_mount+0xbc/0x9e0 [cifs]

? __pfx_cifs_mount+0x10/0x10 [cifs]

? do_raw_spin_unlock+0x5d/0x200

? cifs_setup_cifs_sb+0x29d/0x810 [cifs]

cifs_smb3_do_mount+0x263/0x1990 [cifs]