What is CVE-2026-23210?

CVE-2026-23210 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 6.9 onward and patched in 6.12.80, 6.18.10 and 6.19. CVE-2026-23210 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23210?

CVE-2026-23210 has a CVSS score of 4.7 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-23210?

Yes, CVE-2026-23210 has been patched. Fixed versions include 6.12.80, 6.18.10 and 6.19. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23210 actively exploited?

CVE-2026-23210 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2026-23210

Medium

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>

Package Linux Kernel

Published 2026-02-14

Last modified 2026-04-02

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

4.7

out of 10

Medium

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-476

CVE-2026-23210 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.9 and later are affected. Fixed in 6.12.80, 6.18.10, 6.19 and their respective stable series.

Affected from

≥ 6.9

Fixed in

✓ 6.12.80 6.12.x ✓ 6.18.10 6.18.x ✓ 6.19

References

The following references provide additional information about CVE-2026-23210 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

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

Details

CVE ID CVE-2026-23210

Severity Medium

CVSS score 4.7 / 10

CVSS version 3.1

Published 2026-02-14

Modified 2026-04-02

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-23210?

CVE-2026-23210 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 6.9 onward and has been patched in 6.12.80, 6.18.10 and 6.19. CVE-2026-23210 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-23210?

CVE-2026-23210 has a CVSS score of 4.7 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-23210?

Yes — CVE-2026-23210 has been patched. Fixed versions include 6.12.80, 6.18.10 and 6.19. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23210 actively exploited?

No — CVE-2026-23210 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. View CWE-476 on MITRE CWE →