{"id":"CVE-2026-98795","state":"PUBLISHED","title":"net: sparx5: skip ptp deinit if init was skipped","description":"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 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.","publishedAt":"2026-10-18T15:48:39.633Z","updatedAt":"2026-10-19T09:25:48.008Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0933bd04047c3b96ba49545a8f91e7e6f8f666ff","status":"affected","lessThan":"35c706d6eb1963735814c5f5bb2674a96eacf3cc","versionType":"git"},{"version":"0933bd04047c3b96ba49545a8f91e7e6f8f666ff","status":"affected","lessThan":"2879b65bfa548e10d59c5fba91d17f8a00cd7029","versionType":"git"},{"version":"0933bd04047c3b96ba49545a8f91e7e6f8f666ff","status":"affected","lessThan":"0d2c49915bc3aea4521cda5e4d42f24f63b94585","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c"]}],"references":["https://git.kernel.org/stable/c/35c706d6eb1963735814c5f5bb2674a96eacf3cc","https://git.kernel.org/stable/c/2879b65bfa548e10d59c5fba91d17f8a00cd7029","https://git.kernel.org/stable/c/0d2c49915bc3aea4521cda5e4d42f24f63b94585"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98795.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98795","state":"PUBLISHED","datePublished":"2026-10-18T15:48:39.633Z","dateUpdated":"2026-10-19T09:25:48.008Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.370Z"},"containers":{"cna":{"title":"net: sparx5: skip ptp deinit if init was skipped","descriptions":[{"lang":"en","value":"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 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0933bd04047c3b96ba49545a8f91e7e6f8f666ff","status":"affected","lessThan":"35c706d6eb1963735814c5f5bb2674a96eacf3cc","versionType":"git"},{"version":"0933bd04047c3b96ba49545a8f91e7e6f8f666ff","status":"affected","lessThan":"2879b65bfa548e10d59c5fba91d17f8a00cd7029","versionType":"git"},{"version":"0933bd04047c3b96ba49545a8f91e7e6f8f666ff","status":"affected","lessThan":"0d2c49915bc3aea4521cda5e4d42f24f63b94585","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:25:48.008Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}