{"id":"CVE-2026-23210","title":"ice: Fix PTP NULL pointer dereference during VSI rebuild","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 803bef817807d2d36c930dada20c96fffae0dd19 < ba0c7fff6616025a7d3a9e887e7ce16b06dc34b9","Linux >= 803bef817807d2d36c930dada20c96fffae0dd19 < 7565d4df66b6619b50dc36618d8b8f1787d77e19","Linux >= 803bef817807d2d36c930dada20c96fffae0dd19 < fc6f36eaaedcf4b81af6fe1a568f018ffd530660","Linux 6.9"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-06-10T20:41:52.270125Z"},"published":"2026-02-14","updated":"2026-10-19","sourceUpdated":"2026-10-19T18:35:38.869Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23210","references":[{"url":"https://git.kernel.org/stable/c/ba0c7fff6616025a7d3a9e887e7ce16b06dc34b9"},{"url":"https://git.kernel.org/stable/c/7565d4df66b6619b50dc36618d8b8f1787d77e19"},{"url":"https://git.kernel.org/stable/c/fc6f36eaaedcf4b81af6fe1a568f018ffd530660"}],"tags":["cve.org"],"epss":0.00124,"epssPercentile":0.01921,"ingestedAt":"2026-10-19T19:38:06.500Z","slug":"CVE-2026-23210","body":"## Overview\n\nIn 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>\n\n## Affected\n\n- `Linux >= 803bef817807d2d36c930dada20c96fffae0dd19 < ba0c7fff6616025a7d3a9e887e7ce16b06dc34b9`\n- `Linux >= 803bef817807d2d36c930dada20c96fffae0dd19 < 7565d4df66b6619b50dc36618d8b8f1787d77e19`\n- `Linux >= 803bef817807d2d36c930dada20c96fffae0dd19 < fc6f36eaaedcf4b81af6fe1a568f018ffd530660`\n- `Linux 6.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}