CVE & CISA-KEV Catalog

CVE-2025-40355

MEDIUM
5.5
CVSS v3
NVD

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.

How to fix

Remediation Available
linuxDebian
Fixed in:6.17.6-1CVE-2025-40355
linuxUbuntu
Fixed in:6.17.0-14.14USN-8029-1
linux-awsUbuntu
Fixed in:6.17.0-1007.7USN-8029-2
linux-azureUbuntu
Fixed in:6.17.0-1008.8USN-8029-3
linux-gcpUbuntu
Fixed in:6.17.0-1007.7USN-8030-1
linux-image-6.17.0-1006-realtimeUbuntu
Fixed in:6.17.0-1006.7USN-8029-1
linux-image-6.17.0-1007-awsUbuntu
Fixed in:6.17.0-1007.7USN-8029-2
linux-image-6.17.0-1007-aws-64kUbuntu
Fixed in:6.17.0-1007.7USN-8029-2
linux-image-6.17.0-1007-gcpUbuntu
Fixed in:6.17.0-1007.7USN-8030-1
linux-image-6.17.0-1007-gcp-64kUbuntu
Fixed in:6.17.0-1007.7USN-8030-1
linux-image-6.17.0-1007-oracleUbuntu
Fixed in:6.17.0-1007.7USN-8029-2
linux-image-6.17.0-1007-oracle-64kUbuntu
Fixed in:6.17.0-1007.7USN-8029-2
linux-image-6.17.0-1008-azureUbuntu
Fixed in:6.17.0-1008.8USN-8029-3
linux-image-6.17.0-1008-raspiUbuntu
Fixed in:6.17.0-1008.8USN-8029-1
linux-image-6.17.0-1011-oemUbuntu
Fixed in:6.17.0-1011.11USN-8048-1
linux-image-6.17.0-14-genericUbuntu
Fixed in:6.17.0-14.14USN-8029-1
linux-image-6.17.0-14-generic-64kUbuntu
Fixed in:6.17.0-14.14USN-8029-1
linux-image-awsUbuntu
Fixed in:6.17.0-1007.7USN-8029-2
linux-image-aws-6.17Ubuntu
Fixed in:6.17.0-1007.7USN-8029-2
linux-image-aws-64kUbuntu
Fixed in:6.17.0-1007.7USN-8029-2
linux-image-aws-64k-6.17Ubuntu
Fixed in:6.17.0-1007.7USN-8029-2
linux-image-azureUbuntu
Fixed in:6.17.0-1008.8USN-8029-3
linux-image-azure-6.17Ubuntu
Fixed in:6.17.0-1008.8USN-8029-3
linux-image-gcpUbuntu
Fixed in:6.17.0-1007.7USN-8030-1
linux-image-gcp-6.17Ubuntu
Fixed in:6.17.0-1007.7USN-8030-1
linux-image-gcp-64kUbuntu
Fixed in:6.17.0-1007.7USN-8030-1
linux-image-gcp-64k-6.17Ubuntu
Fixed in:6.17.0-1007.7USN-8030-1
linux-image-genericUbuntu
Fixed in:6.17.0-14.14USN-8029-1
linux-image-generic-6.17Ubuntu
Fixed in:6.17.0-14.14USN-8029-1
linux-image-generic-64kUbuntu
Fixed in:6.17.0-14.14USN-8029-1
linux-image-generic-64k-6.17Ubuntu
Fixed in:6.17.0-14.14USN-8029-1
linux-image-oem-6.17Ubuntu
Fixed in:6.17.0-1011.11USN-8048-1
linux-image-oracleUbuntu
Fixed in:6.17.0-1007.7USN-8029-2
linux-image-oracle-6.17Ubuntu
Fixed in:6.17.0-1007.7USN-8029-2
linux-image-oracle-64kUbuntu
Fixed in:6.17.0-1007.7USN-8029-2
linux-image-oracle-64k-6.17Ubuntu
Fixed in:6.17.0-1007.7USN-8029-2
linux-image-raspiUbuntu
Fixed in:6.17.0-1008.8USN-8029-1
linux-image-raspi-6.17Ubuntu
Fixed in:6.17.0-1008.8USN-8029-1
linux-image-realtimeUbuntu
Fixed in:6.17.0-1006.7USN-8029-1
linux-image-realtime-6.17Ubuntu
Fixed in:6.17.0-1006.7USN-8029-1
linux-image-virtualUbuntu
Fixed in:6.17.0-14.14USN-8029-1
linux-image-virtual-6.17Ubuntu
Fixed in:6.17.0-14.14USN-8029-1
linux-oem-6.17Ubuntu
Fixed in:6.17.0-1011.11USN-8048-1
linux-oracleUbuntu
Fixed in:6.17.0-1007.7USN-8029-2
linux-raspiUbuntu
Fixed in:6.17.0-1008.8USN-8029-1
linux-realtimeUbuntu
Fixed in:6.17.0-1006.7USN-8029-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.15%probability of exploitation in 30 days
5thpercentile

Low risk: more likely to be exploited than 5% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-12-18.