CVE-2025-40355— sysfs: check visibility before changing group attribute ownership
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I. Basic Information for CVE-2025-40355
Vulnerability Information
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Vulnerability Title
sysfs: check visibility before changing group attribute ownership
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: sysfs: check visibility before changing group attribute ownership Since commit 0c17270f9b92 ("net: sysfs: Implement is_visible for phys_(port_id, port_name, switch_id)"), __dev_change_net_namespace() can hit WARN_ON() when trying to change owner of a file that isn't visible. See the trace below: WARNING: CPU: 6 PID: 2938 at net/core/dev.c:12410 __dev_change_net_namespace+0xb89/0xc30 CPU: 6 UID: 0 PID: 2938 Comm: incusd Not tainted 6.17.1-1-mainline #1 PREEMPT(full) 4b783b4a638669fb644857f484487d17cb45ed1f Hardware name: Framework Laptop 13 (AMD Ryzen 7040Series)/FRANMDCP07, BIOS 03.07 02/19/2025 RIP: 0010:__dev_change_net_namespace+0xb89/0xc30 [...] Call Trace: <TASK> ? if6_seq_show+0x30/0x50 do_setlink.isra.0+0xc7/0x1270 ? __nla_validate_parse+0x5c/0xcc0 ? security_capable+0x94/0x1a0 rtnl_newlink+0x858/0xc20 ? update_curr+0x8e/0x1c0 ? update_entity_lag+0x71/0x80 ? sched_balance_newidle+0x358/0x450 ? psi_task_switch+0x113/0x2a0 ? __pfx_rtnl_newlink+0x10/0x10 rtnetlink_rcv_msg+0x346/0x3e0 ? sched_clock+0x10/0x30 ? __pfx_rtnetlink_rcv_msg+0x10/0x10 netlink_rcv_skb+0x59/0x110 netlink_unicast+0x285/0x3c0 ? __alloc_skb+0xdb/0x1a0 netlink_sendmsg+0x20d/0x430 ____sys_sendmsg+0x39f/0x3d0 ? import_iovec+0x2f/0x40 ___sys_sendmsg+0x99/0xe0 __sys_sendmsg+0x8a/0xf0 do_syscall_64+0x81/0x970 ? __sys_bind+0xe3/0x110 ? syscall_exit_work+0x143/0x1b0 ? do_syscall_64+0x244/0x970 ? sock_alloc_file+0x63/0xc0 ? syscall_exit_work+0x143/0x1b0 ? do_syscall_64+0x244/0x970 ? alloc_fd+0x12e/0x190 ? put_unused_fd+0x2a/0x70 ? do_sys_openat2+0xa2/0xe0 ? syscall_exit_work+0x143/0x1b0 ? do_syscall_64+0x244/0x970 ? exc_page_fault+0x7e/0x1a0 entry_SYSCALL_64_after_hwframe+0x76/0x7e [...] </TASK> Fix this by checking is_visible() before trying to touch the attribute.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于sysfs未检查可见性就更改组属性所有权，可能导致警告信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-40355
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Same Patch Batch · Linux · 2025-12-16 · 157 CVEs total
| CVE-2025-68263 | 9.8 CRITICAL | ksmbd: ipc: fix use-after-free in ipc_msg_send_request |
| CVE-2025-68260 | rust_binder: fix race condition on death_list | |
| CVE-2025-68251 | erofs: avoid infinite loops due to corrupted subpage compact indexes | |
| CVE-2025-68252 | misc: fastrpc: Fix dma_buf object leak in fastrpc_map_lookup | |
| CVE-2025-68253 | mm: don't spin in add_stack_record when gfp flags don't allow | |
| CVE-2025-68254 | staging: rtl8723bs: fix out-of-bounds read in OnBeacon ESR IE parsing | |
| CVE-2025-68255 | staging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing | |
| CVE-2025-68256 | staging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser | |
| CVE-2025-68257 | comedi: check device's attached status in compat ioctls | |
| CVE-2025-68258 | comedi: multiq3: sanitize config options in multiq3_attach() | |
| CVE-2025-68259 | KVM: SVM: Don't skip unrelated instruction if INT3/INTO is replaced | |
| CVE-2025-68265 | nvme: fix admin request_queue lifetime | |
| CVE-2025-68283 | libceph: replace BUG_ON with bounds check for map->max_osd | |
| CVE-2025-68282 | usb: gadget: udc: fix use-after-free in usb_gadget_state_work | |
| CVE-2025-68281 | ASoC: SDCA: bug fix while parsing mipi-sdca-control-cn-list | |
| CVE-2025-68266 | bfs: Reconstruct file type when loading from disk | |
| CVE-2025-68262 | crypto: zstd - fix double-free in per-CPU stream cleanup | |
| CVE-2025-68261 | ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock() | |
| CVE-2025-68250 | hung_task: fix warnings caused by unaligned lock pointers | |
| CVE-2025-68264 | ext4: refresh inline data size before write operations |
Showing top 20 of 157 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2025-40355
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