SB20261022408 - NULL pointer dereference in Linux kernel microchip sparx5 driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-98795)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local privileged user to cause a denial of service by triggering a kernel NULL pointer dereference.

The vulnerability exists due to a null pointer dereference in sparx5_ptp_deinit() when unbinding the driver after PTP initialization was skipped because the SPX5_FEATURE_PTP flag or a described "ptp" interrupt was absent. A local privileged user can unbind the driver to trigger cleanup of uninitialized PTP resources and cause a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0d2c49915bc3aea4521cda5e4d42f24f63b94585
• https://git.kernel.org/stable/c/2879b65bfa548e10d59c5fba91d17f8a00cd7029
• https://git.kernel.org/stable/c/35c706d6eb1963735814c5f5bb2674a96eacf3cc