ice: Fix PTP NULL pointer dereference during VSI rebuild

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-23210",
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "dateUpdated": "2026-02-14T16:27:31.892Z",
    "dateReserved": "2026-01-13T15:37:45.986Z",
    "datePublished": "2026-02-14T16:27:31.892Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux",
        "dateUpdated": "2026-02-14T16:27:31.892Z"
      },
      "title": "ice: Fix PTP NULL pointer dereference during VSI rebuild",
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nice: Fix PTP NULL pointer dereference during VSI rebuild\n\nFix race condition where PTP periodic work runs while VSI is being\nrebuilt, accessing NULL vsi->rx_rings.\n\nThe sequence was:\n1. ice_ptp_prepare_for_reset() cancels PTP work\n2. ice_ptp_rebuild() immediately queues PTP work\n3. VSI rebuild happens AFTER ice_ptp_rebuild()\n4. PTP work runs and accesses NULL vsi->rx_rings\n\nFix: Keep PTP work cancelled during rebuild, only queue it after\nVSI rebuild completes in ice_rebuild().\n\nAdded ice_ptp_queue_work() helper function to encapsulate the logic\nfor queuing PTP work, ensuring it's only queued when PTP is supported\nand the state is ICE_PTP_READY.\n\nError log:\n[  121.392544] ice 0000:60:00.1: PTP reset successful\n[  121.392692] BUG: kernel NULL pointer dereference, address: 0000000000000000\n[  121.392712] #PF: supervisor read access in kernel mode\n[  121.392720] #PF: error_code(0x0000) - not-present page\n[  121.392727] PGD 0\n[  121.392734] Oops: Oops: 0000 [#1] SMP NOPTI\n[  121.392746] CPU: 8 UID: 0 PID: 1005 Comm: ice-ptp-0000:60 Tainted: G S                  6.19.0-rc6+ #4 PREEMPT(voluntary)\n[  121.392761] Tainted: [S]=CPU_OUT_OF_SPEC\n[  121.392773] RIP: 0010:ice_ptp_update_cached_phctime+0xbf/0x150 [ice]\n[  121.393042] Call Trace:\n[  121.393047]  <TASK>\n[  121.393055]  ice_ptp_periodic_work+0x69/0x180 [ice]\n[  121.393202]  kthread_worker_fn+0xa2/0x260\n[  121.393216]  ? __pfx_ice_ptp_periodic_work+0x10/0x10 [ice]\n[  121.393359]  ? __pfx_kthread_worker_fn+0x10/0x10\n[  121.393371]  kthread+0x10d/0x230\n[  121.393382]  ? __pfx_kthread+0x10/0x10\n[  121.393393]  ret_from_fork+0x273/0x2b0\n[  121.393407]  ? __pfx_kthread+0x10/0x10\n[  121.393417]  ret_from_fork_asm+0x1a/0x30\n[  121.393432]  </TASK>"
        }
      ],
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/ice/ice_main.c",
            "drivers/net/ethernet/intel/ice/ice_ptp.c",
            "drivers/net/ethernet/intel/ice/ice_ptp.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "803bef817807d2d36c930dada20c96fffae0dd19",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7565d4df66b6619b50dc36618d8b8f1787d77e19"
            },
            {
              "version": "803bef817807d2d36c930dada20c96fffae0dd19",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fc6f36eaaedcf4b81af6fe1a568f018ffd530660"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/ice/ice_main.c",
            "drivers/net/ethernet/intel/ice/ice_ptp.c",
            "drivers/net/ethernet/intel/ice/ice_ptp.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.9",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.9"
            },
            {
              "version": "6.18.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7565d4df66b6619b50dc36618d8b8f1787d77e19"
        },
        {
          "url": "https://git.kernel.org/stable/c/fc6f36eaaedcf4b81af6fe1a568f018ffd530660"
        }
      ]
    }
  }
}