{"id":"CVE-2026-98795","title":"net: sparx5: skip ptp deinit if init was skipped","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sparx5: skip ptp deinit if init was skipped\n\nsparx5_ptp_init() returns early on the base lan969x variants\nbecause they do not have the SPX5_FEATURE_PTP flag. It al…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 0933bd04047c3b96ba49545a8f91e7e6f8f666ff < 35c706d6eb1963735814c5f5bb2674a96eacf3cc","Linux >= 0933bd04047c3b96ba49545a8f91e7e6f8f666ff < 2879b65bfa548e10d59c5fba91d17f8a00cd7029","Linux >= 0933bd04047c3b96ba49545a8f91e7e6f8f666ff < 0d2c49915bc3aea4521cda5e4d42f24f63b94585","Linux 5.18"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:48:39.633Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98795","references":[{"url":"https://git.kernel.org/stable/c/35c706d6eb1963735814c5f5bb2674a96eacf3cc"},{"url":"https://git.kernel.org/stable/c/2879b65bfa548e10d59c5fba91d17f8a00cd7029"},{"url":"https://git.kernel.org/stable/c/0d2c49915bc3aea4521cda5e4d42f24f63b94585"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T16:47:32.484Z","slug":"CVE-2026-98795","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: sparx5: skip ptp deinit if init was skipped\n\nsparx5_ptp_init() returns early on the base lan969x variants\nbecause they do not have the SPX5_FEATURE_PTP flag. It also returns early\nwhen no \"ptp\" interrupt is described. Unbinding the driver then causes a\nNULL pointer dereference when cleaning up uninitialized tx_skbs queues:\n\n    Unable to handle kernel NULL pointer dereference at virtual address\n    0000000000000008\n    Call trace:\n    skb_queue_purge_reason+0x68/0x120 (P)\n    sparx5_ptp_deinit+0x64/0xc0\n    mchp_sparx5_remove+0x38/0x70\n    platform_remove+0x20/0x30\n    device_remove+0x4c/0x80\n\nBefore per-port tx_skbs were added, a NULL dereference would have happened\nwhen calling ptp_clock_unregister() on the never-registered PTP clocks.\n\nFix by returning early in sparx5_ptp_deinit() if PTP is not used.\n\n## Affected\n\n- `Linux >= 0933bd04047c3b96ba49545a8f91e7e6f8f666ff < 35c706d6eb1963735814c5f5bb2674a96eacf3cc`\n- `Linux >= 0933bd04047c3b96ba49545a8f91e7e6f8f666ff < 2879b65bfa548e10d59c5fba91d17f8a00cd7029`\n- `Linux >= 0933bd04047c3b96ba49545a8f91e7e6f8f666ff < 0d2c49915bc3aea4521cda5e4d42f24f63b94585`\n- `Linux 5.18`\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":[]}