CVE-2026-22981 - Vulnerability Details

Vendors	Products
Linux	Linux Kernel

Link	Providers
https://git.kernel.org/stable/c/2e281e1155fc476c571c0bd2ffbfe28ab829a5c3
https://git.kernel.org/stable/c/ac122f5fb050903b3d262001562c452be95eaf70

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: idpf: detach and close netdevs while handling a reset Protect the reset path from callbacks by setting the netdevs to detached state and close any netdevs in UP state until the reset handling has completed. During a reset, the driver will de-allocate resources for the vport, and there is no guarantee that those will recover, which is why the existing vport_ctrl_lock does not provide sufficient protection. idpf_detach_and_close() is called right before reset handling. If the reset handling succeeds, the netdevs state is recovered via call to idpf_attach_and_open(). If the reset handling fails the netdevs remain down. The detach/down calls are protected with RTNL lock to avoid racing with callbacks. On the recovery side the attach can be done without holding the RTNL lock as there are no callbacks expected at that point, due to detach/close always being done first in that flow. The previous logic restoring the netdevs state based on the IDPF_VPORT_UP_REQUESTED flag in the init task is not needed anymore, hence the removal of idpf_set_vport_state(). The IDPF_VPORT_UP_REQUESTED is still being used to restore the state of the netdevs following the reset, but has no use outside of the reset handling flow. idpf_init_hard_reset() is converted to void, since it was used as such and there is no error handling being done based on its return value. Before this change, invoking hard and soft resets simultaneously will cause the driver to lose the vport state: ip -br a <inf> UP echo 1 > /sys/class/net/ens801f0/device/reset& \ ethtool -L ens801f0 combined 8 ip -br a <inf> DOWN ip link set <inf> up ip -br a <inf> DOWN Also in case of a failure in the reset path, the netdev is left exposed to external callbacks, while vport resources are not initialized, leading to a crash on subsequent ifup/down: [408471.398966] idpf 0000:83:00.0: HW reset detected [408471.411744] idpf 0000:83:00.0: Device HW Reset initiated [408472.277901] idpf 0000:83:00.0: The driver was unable to contact the device's firmware. Check that the FW is running. Driver state= 0x2 [408508.125551] BUG: kernel NULL pointer dereference, address: 0000000000000078 [408508.126112] #PF: supervisor read access in kernel mode [408508.126687] #PF: error_code(0x0000) - not-present page [408508.127256] PGD 2aae2f067 P4D 0 [408508.127824] Oops: Oops: 0000 [#1] SMP NOPTI ... [408508.130871] RIP: 0010:idpf_stop+0x39/0x70 [idpf] ... [408508.139193] Call Trace: [408508.139637] <TASK> [408508.140077] __dev_close_many+0xbb/0x260 [408508.140533] __dev_change_flags+0x1cf/0x280 [408508.140987] netif_change_flags+0x26/0x70 [408508.141434] dev_change_flags+0x3d/0xb0 [408508.141878] devinet_ioctl+0x460/0x890 [408508.142321] inet_ioctl+0x18e/0x1d0 [408508.142762] ? _copy_to_user+0x22/0x70 [408508.143207] sock_do_ioctl+0x3d/0xe0 [408508.143652] sock_ioctl+0x10e/0x330 [408508.144091] ? find_held_lock+0x2b/0x80 [408508.144537] __x64_sys_ioctl+0x96/0xe0 [408508.144979] do_syscall_64+0x79/0x3d0 [408508.145415] entry_SYSCALL_64_after_hwframe+0x76/0x7e [408508.145860] RIP: 0033:0x7f3e0bb4caff
Title		idpf: detach and close netdevs while handling a reset
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/2e281e1155fc476c571c0bd2ffbfe28ab829a5c3 https://git.kernel.org/stable/c/ac122f5fb050903b3d262001562c452be95eaf70

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-22981", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.936Z", "datePublished": "2026-01-23T15:24:03.772Z", "dateUpdated": "2026-01-23T15:24:03.772Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-01-23T15:24:03.772Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nidpf: detach and close netdevs while handling a reset\n\nProtect the reset path from callbacks by setting the netdevs to detached\nstate and close any netdevs in UP state until the reset handling has\ncompleted. During a reset, the driver will de-allocate resources for the\nvport, and there is no guarantee that those will recover, which is why the\nexisting vport_ctrl_lock does not provide sufficient protection.\n\nidpf_detach_and_close() is called right before reset handling. If the\nreset handling succeeds, the netdevs state is recovered via call to\nidpf_attach_and_open(). If the reset handling fails the netdevs remain\ndown. The detach/down calls are protected with RTNL lock to avoid racing\nwith callbacks. On the recovery side the attach can be done without\nholding the RTNL lock as there are no callbacks expected at that point,\ndue to detach/close always being done first in that flow.\n\nThe previous logic restoring the netdevs state based on the\nIDPF_VPORT_UP_REQUESTED flag in the init task is not needed anymore, hence\nthe removal of idpf_set_vport_state(). The IDPF_VPORT_UP_REQUESTED is\nstill being used to restore the state of the netdevs following the reset,\nbut has no use outside of the reset handling flow.\n\nidpf_init_hard_reset() is converted to void, since it was used as such and\nthere is no error handling being done based on its return value.\n\nBefore this change, invoking hard and soft resets simultaneously will\ncause the driver to lose the vport state:\nip -br a\n<inf>\tUP\necho 1 > /sys/class/net/ens801f0/device/reset& \\\nethtool -L ens801f0 combined 8\nip -br a\n<inf>\tDOWN\nip link set <inf> up\nip -br a\n<inf>\tDOWN\n\nAlso in case of a failure in the reset path, the netdev is left\nexposed to external callbacks, while vport resources are not\ninitialized, leading to a crash on subsequent ifup/down:\n[408471.398966] idpf 0000:83:00.0: HW reset detected\n[408471.411744] idpf 0000:83:00.0: Device HW Reset initiated\n[408472.277901] idpf 0000:83:00.0: The driver was unable to contact the device's firmware. Check that the FW is running. Driver state= 0x2\n[408508.125551] BUG: kernel NULL pointer dereference, address: 0000000000000078\n[408508.126112] #PF: supervisor read access in kernel mode\n[408508.126687] #PF: error_code(0x0000) - not-present page\n[408508.127256] PGD 2aae2f067 P4D 0\n[408508.127824] Oops: Oops: 0000 [#1] SMP NOPTI\n...\n[408508.130871] RIP: 0010:idpf_stop+0x39/0x70 [idpf]\n...\n[408508.139193] Call Trace:\n[408508.139637] <TASK>\n[408508.140077] __dev_close_many+0xbb/0x260\n[408508.140533] __dev_change_flags+0x1cf/0x280\n[408508.140987] netif_change_flags+0x26/0x70\n[408508.141434] dev_change_flags+0x3d/0xb0\n[408508.141878] devinet_ioctl+0x460/0x890\n[408508.142321] inet_ioctl+0x18e/0x1d0\n[408508.142762] ? _copy_to_user+0x22/0x70\n[408508.143207] sock_do_ioctl+0x3d/0xe0\n[408508.143652] sock_ioctl+0x10e/0x330\n[408508.144091] ? find_held_lock+0x2b/0x80\n[408508.144537] __x64_sys_ioctl+0x96/0xe0\n[408508.144979] do_syscall_64+0x79/0x3d0\n[408508.145415] entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[408508.145860] RIP: 0033:0x7f3e0bb4caff"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/intel/idpf/idpf_lib.c"], "versions": [{"version": "0fe45467a1041ea3657a7fa3a791c84c104fbd34", "lessThan": "ac122f5fb050903b3d262001562c452be95eaf70", "status": "affected", "versionType": "git"}, {"version": "0fe45467a1041ea3657a7fa3a791c84c104fbd34", "lessThan": "2e281e1155fc476c571c0bd2ffbfe28ab829a5c3", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/intel/idpf/idpf_lib.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.6", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19-rc5", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.18.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.19-rc5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ac122f5fb050903b3d262001562c452be95eaf70"}, {"url": "https://git.kernel.org/stable/c/2e281e1155fc476c571c0bd2ffbfe28ab829a5c3"}], "title": "idpf: detach and close netdevs while handling a reset", "x_generator": {"engine": "bippy-1.2.0"}}}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nidpf: detach and close netdevs while handling a reset\n\nProtect the reset path from callbacks by setting the netdevs to detached\nstate and close any netdevs in UP state until the reset handling has\ncompleted. During a reset, the driver will de-allocate resources for the\nvport, and there is no guarantee that those will recover, which is why the\nexisting vport_ctrl_lock does not provide sufficient protection.\n\nidpf_detach_and_close() is called right before reset handling. If the\nreset handling succeeds, the netdevs state is recovered via call to\nidpf_attach_and_open(). If the reset handling fails the netdevs remain\ndown. The detach/down calls are protected with RTNL lock to avoid racing\nwith callbacks. On the recovery side the attach can be done without\nholding the RTNL lock as there are no callbacks expected at that point,\ndue to detach/close always being done first in that flow.\n\nThe previous logic restoring the netdevs state based on the\nIDPF_VPORT_UP_REQUESTED flag in the init task is not needed anymore, hence\nthe removal of idpf_set_vport_state(). The IDPF_VPORT_UP_REQUESTED is\nstill being used to restore the state of the netdevs following the reset,\nbut has no use outside of the reset handling flow.\n\nidpf_init_hard_reset() is converted to void, since it was used as such and\nthere is no error handling being done based on its return value.\n\nBefore this change, invoking hard and soft resets simultaneously will\ncause the driver to lose the vport state:\nip -br a\n<inf>\tUP\necho 1 > /sys/class/net/ens801f0/device/reset& \\\nethtool -L ens801f0 combined 8\nip -br a\n<inf>\tDOWN\nip link set <inf> up\nip -br a\n<inf>\tDOWN\n\nAlso in case of a failure in the reset path, the netdev is left\nexposed to external callbacks, while vport resources are not\ninitialized, leading to a crash on subsequent ifup/down:\n[408471.398966] idpf 0000:83:00.0: HW reset detected\n[408471.411744] idpf 0000:83:00.0: Device HW Reset initiated\n[408472.277901] idpf 0000:83:00.0: The driver was unable to contact the device's firmware. Check that the FW is running. Driver state= 0x2\n[408508.125551] BUG: kernel NULL pointer dereference, address: 0000000000000078\n[408508.126112] #PF: supervisor read access in kernel mode\n[408508.126687] #PF: error_code(0x0000) - not-present page\n[408508.127256] PGD 2aae2f067 P4D 0\n[408508.127824] Oops: Oops: 0000 [#1] SMP NOPTI\n...\n[408508.130871] RIP: 0010:idpf_stop+0x39/0x70 [idpf]\n...\n[408508.139193] Call Trace:\n[408508.139637] <TASK>\n[408508.140077] __dev_close_many+0xbb/0x260\n[408508.140533] __dev_change_flags+0x1cf/0x280\n[408508.140987] netif_change_flags+0x26/0x70\n[408508.141434] dev_change_flags+0x3d/0xb0\n[408508.141878] devinet_ioctl+0x460/0x890\n[408508.142321] inet_ioctl+0x18e/0x1d0\n[408508.142762] ? _copy_to_user+0x22/0x70\n[408508.143207] sock_do_ioctl+0x3d/0xe0\n[408508.143652] sock_ioctl+0x10e/0x330\n[408508.144091] ? find_held_lock+0x2b/0x80\n[408508.144537] __x64_sys_ioctl+0x96/0xe0\n[408508.144979] do_syscall_64+0x79/0x3d0\n[408508.145415] entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[408508.145860] RIP: 0033:0x7f3e0bb4caff"}], "id": "CVE-2026-22981", "lastModified": "2026-01-23T16:15:54.117", "metrics": {}, "published": "2026-01-23T16:15:54.117", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2e281e1155fc476c571c0bd2ffbfe28ab829a5c3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ac122f5fb050903b3d262001562c452be95eaf70"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

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