Riskcovery

CVE-2026-98795

net: sparx5: skip ptp deinit if init was skipped

State
Published
Severity
Not scored
Published
Oct 18, 2026
Updated
Oct 19, 2026
Reserved
Sep 25, 2026

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

net: sparx5: skip ptp deinit if init was skipped

sparx5_ptp_init() returns early on the base lan969x variants because they do not have the SPX5_FEATURE_PTP flag. It also returns early when no "ptp" interrupt is described. Unbinding the driver then causes a NULL pointer dereference when cleaning up uninitialized tx_skbs queues:

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 Call trace: skb_queue_purge_reason+0x68/0x120 (P) sparx5_ptp_deinit+0x64/0xc0 mchp_sparx5_remove+0x38/0x70 platform_remove+0x20/0x30 device_remove+0x4c/0x80

Before per-port tx_skbs were added, a NULL dereference would have happened when calling ptp_clock_unregister() on the never-registered PTP clocks.

Fix by returning early in sparx5_ptp_deinit() if PTP is not used.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 0933bd04047c3b96ba49545a8f91e7e6f8f666ff to before 35c706d6eb1963735814c5f5bb2674a96eacf3ccAffected
  • 0933bd04047c3b96ba49545a8f91e7e6f8f666ff to before 2879b65bfa548e10d59c5fba91d17f8a00cd7029Affected
  • 0933bd04047c3b96ba49545a8f91e7e6f8f666ff to before 0d2c49915bc3aea4521cda5e4d42f24f63b94585Affected
LinuxLinux
  • 5.18Affected
  • before 5.18Not affected
  • 6.18.56 through 6.18.*Not affected
  • 7.2.10 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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