{"id":"DEBIAN-CVE-2026-31695","details":"In the Linux kernel, the following vulnerability has been resolved:  wifi: virt_wifi: remove SET_NETDEV_DEV to avoid use-after-free  Currently we execute `SET_NETDEV_DEV(dev, &priv-\u003elowerdev-\u003edev)` for the virt_wifi net devices. However, unregistering a virt_wifi device in netdev_run_todo() can happen together with the device referenced by SET_NETDEV_DEV().  It can result in use-after-free during the ethtool operations performed on a virt_wifi device that is currently being unregistered. Such a net device can have the `dev.parent` field pointing to the freed memory, but ethnl_ops_begin() calls `pm_runtime_get_sync(dev-\u003edev.parent)`.  Let's remove SET_NETDEV_DEV for virt_wifi to avoid bugs like this:   ==================================================================  BUG: KASAN: slab-use-after-free in __pm_runtime_resume+0xe2/0xf0  Read of size 2 at addr ffff88810cfc46f8 by task pm/606   Call Trace:   \u003cTASK\u003e   dump_stack_lvl+0x4d/0x70   print_report+0x170/0x4f3   ? __pfx__raw_spin_lock_irqsave+0x10/0x10   kasan_report+0xda/0x110   ? __pm_runtime_resume+0xe2/0xf0   ? __pm_runtime_resume+0xe2/0xf0   __pm_runtime_resume+0xe2/0xf0   ethnl_ops_begin+0x49/0x270   ethnl_set_features+0x23c/0xab0   ? __pfx_ethnl_set_features+0x10/0x10   ? kvm_sched_clock_read+0x11/0x20   ? local_clock_noinstr+0xf/0xf0   ? local_clock+0x10/0x30   ? kasan_save_track+0x25/0x60   ? __kasan_kmalloc+0x7f/0x90   ? genl_family_rcv_msg_attrs_parse.isra.0+0x150/0x2c0   genl_family_rcv_msg_doit+0x1e7/0x2c0   ? __pfx_genl_family_rcv_msg_doit+0x10/0x10   ? __pfx_cred_has_capability.isra.0+0x10/0x10   ? stack_trace_save+0x8e/0xc0   genl_rcv_msg+0x411/0x660   ? __pfx_genl_rcv_msg+0x10/0x10   ? __pfx_ethnl_set_features+0x10/0x10   netlink_rcv_skb+0x121/0x380   ? __pfx_genl_rcv_msg+0x10/0x10   ? __pfx_netlink_rcv_skb+0x10/0x10   ? __pfx_down_read+0x10/0x10   genl_rcv+0x23/0x30   netlink_unicast+0x60f/0x830   ? __pfx_netlink_unicast+0x10/0x10   ? __pfx___alloc_skb+0x10/0x10   netlink_sendmsg+0x6ea/0xbc0   ? __pfx_netlink_sendmsg+0x10/0x10   ? __futex_queue+0x10b/0x1f0   ____sys_sendmsg+0x7a2/0x950   ? copy_msghdr_from_user+0x26b/0x430   ? __pfx_____sys_sendmsg+0x10/0x10   ? __pfx_copy_msghdr_from_user+0x10/0x10   ___sys_sendmsg+0xf8/0x180   ? __pfx____sys_sendmsg+0x10/0x10   ? __pfx_futex_wait+0x10/0x10   ? fdget+0x2e4/0x4a0   __sys_sendmsg+0x11f/0x1c0   ? __pfx___sys_sendmsg+0x10/0x10   do_syscall_64+0xe2/0x570   ? exc_page_fault+0x66/0xb0   entry_SYSCALL_64_after_hwframe+0x77/0x7f   \u003c/TASK\u003e  This fix may be combined with another one in the ethtool subsystem: https://lore.kernel.org/all/20260322075917.254874-1-alex.popov@linux.com/T/#u","modified":"2026-09-01T16:06:38.618330841Z","published":"2026-05-01T14:16:19.250Z","upstream":["CVE-2026-31695"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-31695"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.170-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.147-1","6.1.148-1","6.1.153-1","6.1.158-1","6.1.159-1","6.1.162-1","6.1.164-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-31695.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.85-1"}]}],"versions":["6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1~bpo12+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-31695.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.19.12-1"}]}],"versions":["6.12.100-1","6.12.101-1","6.12.105-1","6.12.107-1","6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1","6.12.85-1~bpo12+1","6.12.86-1","6.12.86-1~bpo12+1","6.12.88-1","6.12.88-1~bpo12+1","6.12.90-1","6.12.90-1~bpo12+1","6.12.90-2","6.12.90-2~bpo12+1","6.12.94-1","6.12.94-1~bpo12+1","6.12.95-1","6.12.95-1~bpo12+1","6.12.96-1","6.13.10-1~exp1","6.13.11-1~exp1","6.13.2-1~exp1","6.13.3-1~exp1","6.13.4-1~exp1","6.13.5-1~exp1","6.13.6-1~exp1","6.13.7-1~exp1","6.13.8-1~exp1","6.13.9-1~exp1","6.13~rc6-1~exp1","6.13~rc7-1~exp1","6.14.3-1~exp1","6.14.5-1~exp1","6.14.6-1~exp1","6.15-1~exp1","6.15.1-1~exp1","6.15.2-1~exp1","6.15.3-1~exp1","6.15.4-1~exp1","6.15.5-1~exp1","6.15.6-1~exp1","6.15~rc7-1~exp1","6.16-1~exp1","6.16.1-1~exp1","6.16.10-1","6.16.11-1","6.16.12-1","6.16.12-1~bpo13+1","6.16.12-2","6.16.3-1","6.16.3-1~bpo13+1","6.16.5-1","6.16.6-1","6.16.7-1","6.16.8-1","6.16.9-1","6.16~rc7-1~exp1","6.17.10-1","6.17.11-1","6.17.12-1","6.17.13-1","6.17.13-1~bpo13+1","6.17.2-1~exp1","6.17.5-1~exp1","6.17.6-1","6.17.7-1","6.17.7-2","6.17.8-1","6.17.8-1~bpo13+1","6.17.9-1","6.18.1-1~exp1","6.18.10-1","6.18.12-1","6.18.12-1~bpo13+1","6.18.13-1","6.18.14-1","6.18.15-1","6.18.15-1~bpo13+1","6.18.2-1~exp1","6.18.3-1","6.18.5-1","6.18.5-1~bpo13+1","6.18.8-1","6.18.9-1","6.18.9-1~bpo13+1","6.18~rc4-1~exp1","6.18~rc4-1~exp2","6.18~rc5-1~exp1","6.18~rc6-1~exp1","6.18~rc7-1~exp1","6.19-1~exp1","6.19.10-1","6.19.10-1~bpo13+1","6.19.11-1","6.19.11-1~bpo13+1","6.19.2-1~exp1","6.19.3-1~exp1","6.19.4-1~exp1","6.19.5-1~exp1","6.19.6-1","6.19.6-2","6.19.6-2~bpo13+1","6.19.8-1","6.19.8-1~bpo13+1","6.19~rc4-1~exp1","6.19~rc5-1~exp1","6.19~rc6-1~exp1","6.19~rc7-1~exp1","6.19~rc8-1~exp1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-31695.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}