Medium 4.7Published Feb 14, 2026

CVE-2026-23210ice: Fix PTP NULL pointer dereference during VSI rebuild

Updated under an hour ago (Oct 27, 2026, 1:30 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: ice: Fix PTP NULL pointer dereference during VSI rebuild Fix race condition where PTP periodic work runs while VSI is being rebuilt, accessing NULL vsi->rx_rings. The sequence was: 1. ice_ptp_prepare_for_reset() cancels PTP work 2. ice_ptp_rebuild() immediately queues PTP work 3. VSI rebuild happens AFTER ice_ptp_rebuild() 4. PTP work runs and accesses NULL vsi->rx_rings Fix: Keep PTP work cancelled during rebuild, only queue it after VSI rebuild completes in ice_rebuild(). Added ice_ptp_queue_work() helper function to encapsulate the logic for queuing PTP work, ensuring it's only queued when PTP is supported and the state is ICE_PTP_READY. Error log: [ 121.392544] ice 0000:60:00.1: PTP reset successful [ 121.392692] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 121.392712] #PF: supervisor read access in kernel mode [ 121.392720] #PF: error_code(0x0000) - not-present page [ 121.392727] PGD 0 [ 121.392734] Oops: Oops: 0000 [#1] SMP NOPTI [ 121.392746] CPU: 8 UID: 0 PID: 1005 Comm: ice-ptp-0000:60 Tainted: G S 6.19.0-rc6+ #4 PREEMPT(voluntary) [ 121.392761] Tainted: [S]=CPU_OUT_OF_SPEC [ 121.392773] RIP: 0010:ice_ptp_update_cached_phctime+0xbf/0x150 [ice] [ 121.393042] Call Trace: [ 121.393047] <TASK> [ 121.393055] ice_ptp_periodic_work+0x69/0x180 [ice] [ 121.393202] kthread_worker_fn+0xa2/0x260 [ 121.393216] ? __pfx_ice_ptp_periodic_work+0x10/0x10 [ice] [ 121.393359] ? __pfx_kthread_worker_fn+0x10/0x10 [ 121.393371] kthread+0x10d/0x230 [ 121.393382] ? __pfx_kthread+0x10/0x10 [ 121.393393] ret_from_fork+0x273/0x2b0 [ 121.393407] ? __pfx_kthread+0x10/0x10 [ 121.393417] ret_from_fork_asm+0x1a/0x30 [ 121.393432] </TASK>

CVSS: 4.7 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-362
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 803bef817807d2d36c930dada20c96fffae0dd19 before ba0c7fff6616025a7d3a9e887e7ce16b06dc34b9; from 803bef817807d2d36c930dada20c96fffae0dd19 before 7565d4df66b6619b50dc36618d8b8f1787d77e19; from 803bef817807d2d36c930dada20c96fffae0dd19 before fc6f36eaaedcf4b81af6fe1a568f018ffd530660	CNA record
linux linux_kernel linux:linux_kernel	from 6.9 before 6.18.10; 6.19; 6.19; 6.19; 6.19; 6.19; 6.19; 6.19; and 1 more ranges	NVD

References

References

https://git.kernel.org/stable/c/ba0c7fff6616025a7d3a9e887e7ce16b06dc34b9
https://git.kernel.org/stable/c/7565d4df66b6619b50dc36618d8b8f1787d77e19	patch
https://git.kernel.org/stable/c/fc6f36eaaedcf4b81af6fe1a568f018ffd530660	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.