{"schema":"threatline.record/2","record":{"id":"CVE-2026-98798","aliases":[],"summary":"net: bcmgenet: fix NULL dereference in set_coalesce before first open","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bcmgenet: fix NULL dereference in set_coalesce before first open\n\nThe Rx ring priv and index are only set in bcmgenet_init_rx_ring(),\nwhich runs at open. Setting the Rx coalescing parameters on an interface\nthat was never opened, e.g. \"ethtool -C eth0 rx-usecs 50\", dereferences\na NULL ring->priv. The oops happens with RTNL held, so networking\nstays stuck until a reboot:\n\n  Unable to handle kernel paging request at virtual address 0000000000002788\n  pc : bcmgenet_set_rx_coalesce.isra.0+0x10/0x88\n  lr : bcmgenet_set_coalesce+0xe8/0x180\n  Call trace:\n   bcmgenet_set_rx_coalesce.isra.0+0x10/0x88 (P)\n   __ethnl_set_coalesce.isra.0+0x490/0x570\n   ethnl_set_coalesce+0x48/0xc0\n   ethnl_default_set_doit+0xf4/0x230\n   genl_family_rcv_msg_doit+0xe8/0x160\n   genl_rcv_msg+0x220/0x2a0\n   netlink_rcv_skb+0x68/0x140\n   genl_rcv+0x40/0x60\n   netlink_unicast+0x338/0x3c0\n   netlink_sendmsg+0x19c/0x3f8\n   __sock_sendmsg+0x64/0xc0\n   __sys_sendto+0x124/0x198\n   __arm64_sys_sendto+0x30/0x48\n\nSet priv and index at probe. Writing the registers while the interface\nis down is harmless because open resets the MAC and\nbcmgenet_init_rx_coalesce() reapplies the stored values.\n\nIt was observed on a Raspberry Pi CM4, but should apply to all other\ngenet devices.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98798","source_modified_at":"2026-10-21T12:57:06.002Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"9f4ca05827a27ec73bf63a42732f1978b8a779af","lessThan":"213ff02ab26a4543ef02b4db393bbdd5fa5679a7","status":"affected","versionType":"git"},{"version":"9f4ca05827a27ec73bf63a42732f1978b8a779af","lessThan":"0d867b91598b6ed2f75998c34f4e2869631da31e","status":"affected","versionType":"git"},{"version":"9f4ca05827a27ec73bf63a42732f1978b8a779af","lessThan":"2294b62eaec6fd3c76a261d287f66641eeafd5f0","status":"affected","versionType":"git"},{"version":"9f4ca05827a27ec73bf63a42732f1978b8a779af","lessThan":"d870102b5425390cab42eebbf3d19ec6a43c6734","status":"affected","versionType":"git"},{"version":"9f4ca05827a27ec73bf63a42732f1978b8a779af","lessThan":"19419faf58dfe5bcc8a9e60e622976c5f8e3ddc1","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98798","source_modified_at":"2026-10-21T12:57:06.002Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"4.17","status":"affected"},{"version":"0","lessThan":"4.17","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.56","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.10","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98798","source_modified_at":"2026-10-21T12:57:06.002Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"213ff02ab26a4543ef02b4db393bbdd5fa5679a7","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98798","source_modified_at":"2026-10-21T12:57:06.002Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0d867b91598b6ed2f75998c34f4e2869631da31e","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98798","source_modified_at":"2026-10-21T12:57:06.002Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"2294b62eaec6fd3c76a261d287f66641eeafd5f0","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98798","source_modified_at":"2026-10-21T12:57:06.002Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"19419faf58dfe5bcc8a9e60e622976c5f8e3ddc1","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.05742,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:48:43.367Z","modified_at":"2026-10-21T12:57:06.002Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98798","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:57:06.002Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98798","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/213ff02ab26a4543ef02b4db393bbdd5fa5679a7"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0d867b91598b6ed2f75998c34f4e2869631da31e"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/2294b62eaec6fd3c76a261d287f66641eeafd5f0"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d870102b5425390cab42eebbf3d19ec6a43c6734"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/19419faf58dfe5bcc8a9e60e622976c5f8e3ddc1"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-21T12:57:06.002Z","content_hash":"522e792889437222e5a13159be4b3141399953d038076de15896e5805cab569d"}}