CVE-2026-22981 (GCVE-0-2026-22981)
Vulnerability from cvelistv5
Published
2026-01-23 15:24
Modified
2026-04-02 11:30
Severity ?
Summary
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
References
Impacted products
Vendor Product Version
Linux Linux Version: 0fe45467a1041ea3657a7fa3a791c84c104fbd34
Version: 0fe45467a1041ea3657a7fa3a791c84c104fbd34
Version: 0fe45467a1041ea3657a7fa3a791c84c104fbd34
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/idpf/idpf_lib.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9ad3d0836d8bc1a0f0b4bf56efc56312a9e64b97",
              "status": "affected",
              "version": "0fe45467a1041ea3657a7fa3a791c84c104fbd34",
              "versionType": "git"
            },
            {
              "lessThan": "ac122f5fb050903b3d262001562c452be95eaf70",
              "status": "affected",
              "version": "0fe45467a1041ea3657a7fa3a791c84c104fbd34",
              "versionType": "git"
            },
            {
              "lessThan": "2e281e1155fc476c571c0bd2ffbfe28ab829a5c3",
              "status": "affected",
              "version": "0fe45467a1041ea3657a7fa3a791c84c104fbd34",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/idpf/idpf_lib.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.80",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.6",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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\u003cinf\u003e\tUP\necho 1 \u003e /sys/class/net/ens801f0/device/reset\u0026 \\\nethtool -L ens801f0 combined 8\nip -br a\n\u003cinf\u003e\tDOWN\nip link set \u003cinf\u003e up\nip -br a\n\u003cinf\u003e\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\u0027s 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]  \u003cTASK\u003e\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"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-02T11:30:47.183Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9ad3d0836d8bc1a0f0b4bf56efc56312a9e64b97"
        },
        {
          "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-22981",
    "datePublished": "2026-01-23T15:24:03.772Z",
    "dateReserved": "2026-01-13T15:37:45.936Z",
    "dateUpdated": "2026-04-02T11:30:47.183Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.