CVE-2025-40355
Gravedad:
Pendiente de análisis
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
16/12/2025
Última modificación:
18/12/2025
Descripción
*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
sysfs: check visibility before changing group attribute ownership<br />
<br />
Since commit 0c17270f9b92 ("net: sysfs: Implement is_visible for<br />
phys_(port_id, port_name, switch_id)"), __dev_change_net_namespace() can<br />
hit WARN_ON() when trying to change owner of a file that isn&#39;t visible.<br />
See the trace below:<br />
<br />
WARNING: CPU: 6 PID: 2938 at net/core/dev.c:12410 __dev_change_net_namespace+0xb89/0xc30<br />
CPU: 6 UID: 0 PID: 2938 Comm: incusd Not tainted 6.17.1-1-mainline #1 PREEMPT(full) 4b783b4a638669fb644857f484487d17cb45ed1f<br />
Hardware name: Framework Laptop 13 (AMD Ryzen 7040Series)/FRANMDCP07, BIOS 03.07 02/19/2025<br />
RIP: 0010:__dev_change_net_namespace+0xb89/0xc30<br />
[...]<br />
Call Trace:<br />
<br />
? if6_seq_show+0x30/0x50<br />
do_setlink.isra.0+0xc7/0x1270<br />
? __nla_validate_parse+0x5c/0xcc0<br />
? security_capable+0x94/0x1a0<br />
rtnl_newlink+0x858/0xc20<br />
? update_curr+0x8e/0x1c0<br />
? update_entity_lag+0x71/0x80<br />
? sched_balance_newidle+0x358/0x450<br />
? psi_task_switch+0x113/0x2a0<br />
? __pfx_rtnl_newlink+0x10/0x10<br />
rtnetlink_rcv_msg+0x346/0x3e0<br />
? sched_clock+0x10/0x30<br />
? __pfx_rtnetlink_rcv_msg+0x10/0x10<br />
netlink_rcv_skb+0x59/0x110<br />
netlink_unicast+0x285/0x3c0<br />
? __alloc_skb+0xdb/0x1a0<br />
netlink_sendmsg+0x20d/0x430<br />
____sys_sendmsg+0x39f/0x3d0<br />
? import_iovec+0x2f/0x40<br />
___sys_sendmsg+0x99/0xe0<br />
__sys_sendmsg+0x8a/0xf0<br />
do_syscall_64+0x81/0x970<br />
? __sys_bind+0xe3/0x110<br />
? syscall_exit_work+0x143/0x1b0<br />
? do_syscall_64+0x244/0x970<br />
? sock_alloc_file+0x63/0xc0<br />
? syscall_exit_work+0x143/0x1b0<br />
? do_syscall_64+0x244/0x970<br />
? alloc_fd+0x12e/0x190<br />
? put_unused_fd+0x2a/0x70<br />
? do_sys_openat2+0xa2/0xe0<br />
? syscall_exit_work+0x143/0x1b0<br />
? do_syscall_64+0x244/0x970<br />
? exc_page_fault+0x7e/0x1a0<br />
entry_SYSCALL_64_after_hwframe+0x76/0x7e<br />
[...]<br />
<br />
<br />
Fix this by checking is_visible() before trying to touch the attribute.