CVE-2026-98798

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98798", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.370Z", "datePublished": "2026-10-18T15:48:43.367Z", "dateUpdated": "2026-10-30T12:39:53.751Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:39:53.751Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/broadcom/genet/bcmgenet.c"], "versions": [{"version": "9f4ca05827a27ec73bf63a42732f1978b8a779af", "lessThan": "51e76b4113e5147329ed8dd232375bf11fd34044", "status": "affected", "versionType": "git"}, {"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"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/broadcom/genet/bcmgenet.c"], "versions": [{"version": "4.17", "status": "affected"}, {"version": "0", "lessThan": "4.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "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"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.18.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/51e76b4113e5147329ed8dd232375bf11fd34044"}, {"url": "https://git.kernel.org/stable/c/213ff02ab26a4543ef02b4db393bbdd5fa5679a7"}, {"url": "https://git.kernel.org/stable/c/0d867b91598b6ed2f75998c34f4e2869631da31e"}, {"url": "https://git.kernel.org/stable/c/2294b62eaec6fd3c76a261d287f66641eeafd5f0"}, {"url": "https://git.kernel.org/stable/c/d870102b5425390cab42eebbf3d19ec6a43c6734"}, {"url": "https://git.kernel.org/stable/c/19419faf58dfe5bcc8a9e60e622976c5f8e3ddc1"}], "title": "net: bcmgenet: fix NULL dereference in set_coalesce before first open", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/broadcom/genet/bcmgenet.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "51e76b4113e5147329ed8dd232375bf11fd34044", "status": "affected", "version": "9f4ca05827a27ec73bf63a42732f1978b8a779af", "versionType": "git"}, {"lessThan": "213ff02ab26a4543ef02b4db393bbdd5fa5679a7", "status": "affected", "version": "9f4ca05827a27ec73bf63a42732f1978b8a779af", "versionType": "git"}, {"lessThan": "0d867b91598b6ed2f75998c34f4e2869631da31e", "status": "affected", "version": "9f4ca05827a27ec73bf63a42732f1978b8a779af", "versionType": "git"}, {"lessThan": "2294b62eaec6fd3c76a261d287f66641eeafd5f0", "status": "affected", "version": "9f4ca05827a27ec73bf63a42732f1978b8a779af", "versionType": "git"}, {"lessThan": "d870102b5425390cab42eebbf3d19ec6a43c6734", "status": "affected", "version": "9f4ca05827a27ec73bf63a42732f1978b8a779af", "versionType": "git"}, {"lessThan": "19419faf58dfe5bcc8a9e60e622976c5f8e3ddc1", "status": "affected", "version": "9f4ca05827a27ec73bf63a42732f1978b8a779af", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/broadcom/genet/bcmgenet.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.17"}, {"lessThan": "4.17", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.56", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-98798", "lastModified": "2026-10-30T13:21:28.387", "metrics": {}, "published": "2026-10-18T16:17:33.807", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0d867b91598b6ed2f75998c34f4e2869631da31e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/19419faf58dfe5bcc8a9e60e622976c5f8e3ddc1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/213ff02ab26a4543ef02b4db393bbdd5fa5679a7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2294b62eaec6fd3c76a261d287f66641eeafd5f0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/51e76b4113e5147329ed8dd232375bf11fd34044"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d870102b5425390cab42eebbf3d19ec6a43c6734"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: bcmgenet: fix NULL dereference in set_coalesce before first open", "id": "2555056", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555056"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: bcmgenet: fix NULL dereference in set_coalesce before first open\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:\nUnable to handle kernel paging request at virtual address 0000000000002788\npc : bcmgenet_set_rx_coalesce.isra.0+0x10/0x88\nlr : bcmgenet_set_coalesce+0xe8/0x180\nCall trace:\nbcmgenet_set_rx_coalesce.isra.0+0x10/0x88 (P)\n__ethnl_set_coalesce.isra.0+0x490/0x570\nethnl_set_coalesce+0x48/0xc0\nethnl_default_set_doit+0xf4/0x230\ngenl_family_rcv_msg_doit+0xe8/0x160\ngenl_rcv_msg+0x220/0x2a0\nnetlink_rcv_skb+0x68/0x140\ngenl_rcv+0x40/0x60\nnetlink_unicast+0x338/0x3c0\nnetlink_sendmsg+0x19c/0x3f8\n__sock_sendmsg+0x64/0xc0\n__sys_sendto+0x124/0x198\n__arm64_sys_sendto+0x30/0x48\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.\nIt was observed on a Raspberry Pi CM4, but should apply to all other\ngenet devices.", "A flaw was found in the Linux kernel's Broadcom GENET network driver. A privileged local user could trigger a Denial of Service (DoS) by configuring receive coalescing settings on a network interface that has not yet been opened. This flaw leads to a null pointer dereference that can crash the kernel or lock networking operations, requiring a system reboot to restore service."], "name": "CVE-2026-98798", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98798\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98798\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98798.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9f4ca05827a27ec73bf63a42732f1978b8a779af,0d867b91598b6ed2f75998c34f4e2869631da31e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9f4ca05827a27ec73bf63a42732f1978b8a779af,2294b62eaec6fd3c76a261d287f66641eeafd5f0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9f4ca05827a27ec73bf63a42732f1978b8a779af,d870102b5425390cab42eebbf3d19ec6a43c6734)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9f4ca05827a27ec73bf63a42732f1978b8a779af,19419faf58dfe5bcc8a9e60e622976c5f8e3ddc1)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.56,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.10,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-18T20:45:06.494949+00:00", "updated": "2026-10-24T01:45:17.369057+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476"]}