CVE-2026-22985 (GCVE-0-2026-22985)

Vulnerability from cvelistv5 – Published: 2026-01-23 15:24 – Updated: 2026-02-09 08:36
VLAI?
Title
idpf: Fix RSS LUT NULL pointer crash on early ethtool operations
Summary
In the Linux kernel, the following vulnerability has been resolved: idpf: Fix RSS LUT NULL pointer crash on early ethtool operations The RSS LUT is not initialized until the interface comes up, causing the following NULL pointer crash when ethtool operations like rxhash on/off are performed before the interface is brought up for the first time. Move RSS LUT initialization from ndo_open to vport creation to ensure LUT is always available. This enables RSS configuration via ethtool before bringing the interface up. Simplify LUT management by maintaining all changes in the driver's soft copy and programming zeros to the indirection table when rxhash is disabled. Defer HW programming until the interface comes up if it is down during rxhash and LUT configuration changes. Steps to reproduce: ** Load idpf driver; interfaces will be created modprobe idpf ** Before bringing the interfaces up, turn rxhash off ethtool -K eth2 rxhash off [89408.371875] BUG: kernel NULL pointer dereference, address: 0000000000000000 [89408.371908] #PF: supervisor read access in kernel mode [89408.371924] #PF: error_code(0x0000) - not-present page [89408.371940] PGD 0 P4D 0 [89408.371953] Oops: Oops: 0000 [#1] SMP NOPTI <snip> [89408.372052] RIP: 0010:memcpy_orig+0x16/0x130 [89408.372310] Call Trace: [89408.372317] <TASK> [89408.372326] ? idpf_set_features+0xfc/0x180 [idpf] [89408.372363] __netdev_update_features+0x295/0xde0 [89408.372384] ethnl_set_features+0x15e/0x460 [89408.372406] genl_family_rcv_msg_doit+0x11f/0x180 [89408.372429] genl_rcv_msg+0x1ad/0x2b0 [89408.372446] ? __pfx_ethnl_set_features+0x10/0x10 [89408.372465] ? __pfx_genl_rcv_msg+0x10/0x10 [89408.372482] netlink_rcv_skb+0x58/0x100 [89408.372502] genl_rcv+0x2c/0x50 [89408.372516] netlink_unicast+0x289/0x3e0 [89408.372533] netlink_sendmsg+0x215/0x440 [89408.372551] __sys_sendto+0x234/0x240 [89408.372571] __x64_sys_sendto+0x28/0x30 [89408.372585] x64_sys_call+0x1909/0x1da0 [89408.372604] do_syscall_64+0x7a/0xfa0 [89408.373140] ? clear_bhb_loop+0x60/0xb0 [89408.373647] entry_SYSCALL_64_after_hwframe+0x76/0x7e [89408.378887] </TASK> <snip>
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a251eee62133774cf35ff829041377e721ef9c8c , < b29a5a7dd1f4293ee49c469938c25bf85a5aa802 (git)
Affected: a251eee62133774cf35ff829041377e721ef9c8c , < 83f38f210b85676f40ba8586b5a8edae19b56995 (git)
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    Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/idpf/idpf.h",
            "drivers/net/ethernet/intel/idpf/idpf_lib.c",
            "drivers/net/ethernet/intel/idpf/idpf_txrx.c",
            "drivers/net/ethernet/intel/idpf/idpf_txrx.h",
            "drivers/net/ethernet/intel/idpf/idpf_virtchnl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b29a5a7dd1f4293ee49c469938c25bf85a5aa802",
              "status": "affected",
              "version": "a251eee62133774cf35ff829041377e721ef9c8c",
              "versionType": "git"
            },
            {
              "lessThan": "83f38f210b85676f40ba8586b5a8edae19b56995",
              "status": "affected",
              "version": "a251eee62133774cf35ff829041377e721ef9c8c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/idpf/idpf.h",
            "drivers/net/ethernet/intel/idpf/idpf_lib.c",
            "drivers/net/ethernet/intel/idpf/idpf_txrx.c",
            "drivers/net/ethernet/intel/idpf/idpf_txrx.h",
            "drivers/net/ethernet/intel/idpf/idpf_virtchnl.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": "6.18.*",
              "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": "6.18.6",
                  "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: Fix RSS LUT NULL pointer crash on early ethtool operations\n\nThe RSS LUT is not initialized until the interface comes up, causing\nthe following NULL pointer crash when ethtool operations like rxhash on/off\nare performed before the interface is brought up for the first time.\n\nMove RSS LUT initialization from ndo_open to vport creation to ensure LUT\nis always available. This enables RSS configuration via ethtool before\nbringing the interface up. Simplify LUT management by maintaining all\nchanges in the driver\u0027s soft copy and programming zeros to the indirection\ntable when rxhash is disabled. Defer HW programming until the interface\ncomes up if it is down during rxhash and LUT configuration changes.\n\nSteps to reproduce:\n** Load idpf driver; interfaces will be created\n\tmodprobe idpf\n** Before bringing the interfaces up, turn rxhash off\n\tethtool -K eth2 rxhash off\n\n[89408.371875] BUG: kernel NULL pointer dereference, address: 0000000000000000\n[89408.371908] #PF: supervisor read access in kernel mode\n[89408.371924] #PF: error_code(0x0000) - not-present page\n[89408.371940] PGD 0 P4D 0\n[89408.371953] Oops: Oops: 0000 [#1] SMP NOPTI\n\u003csnip\u003e\n[89408.372052] RIP: 0010:memcpy_orig+0x16/0x130\n[89408.372310] Call Trace:\n[89408.372317]  \u003cTASK\u003e\n[89408.372326]  ? idpf_set_features+0xfc/0x180 [idpf]\n[89408.372363]  __netdev_update_features+0x295/0xde0\n[89408.372384]  ethnl_set_features+0x15e/0x460\n[89408.372406]  genl_family_rcv_msg_doit+0x11f/0x180\n[89408.372429]  genl_rcv_msg+0x1ad/0x2b0\n[89408.372446]  ? __pfx_ethnl_set_features+0x10/0x10\n[89408.372465]  ? __pfx_genl_rcv_msg+0x10/0x10\n[89408.372482]  netlink_rcv_skb+0x58/0x100\n[89408.372502]  genl_rcv+0x2c/0x50\n[89408.372516]  netlink_unicast+0x289/0x3e0\n[89408.372533]  netlink_sendmsg+0x215/0x440\n[89408.372551]  __sys_sendto+0x234/0x240\n[89408.372571]  __x64_sys_sendto+0x28/0x30\n[89408.372585]  x64_sys_call+0x1909/0x1da0\n[89408.372604]  do_syscall_64+0x7a/0xfa0\n[89408.373140]  ? clear_bhb_loop+0x60/0xb0\n[89408.373647]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[89408.378887]  \u003c/TASK\u003e\n\u003csnip\u003e"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:36:35.697Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b29a5a7dd1f4293ee49c469938c25bf85a5aa802"
        },
        {
          "url": "https://git.kernel.org/stable/c/83f38f210b85676f40ba8586b5a8edae19b56995"
        }
      ],
      "title": "idpf: Fix RSS LUT NULL pointer crash on early ethtool operations",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-22985",
    "datePublished": "2026-01-23T15:24:07.133Z",
    "dateReserved": "2026-01-13T15:37:45.936Z",
    "dateUpdated": "2026-02-09T08:36:35.697Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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