CVE-2026-99192

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-99192", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.400Z", "datePublished": "2026-10-28T10:35:48.686Z", "dateUpdated": "2026-10-30T12:42:50.060Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:42:50.060Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bcmgenet: unshare the skb before writing the control block\n\nbcmgenet stores first_cb, last_cb and bytes_sent in the skb control\nblock and reads them back on completion to free the skb and credit BQL.\nether_setup() leaves IFF_TX_SKB_SHARING set, so the stack can resubmit\na shared skb that is still in the ring. The next transmit overwrites\nlast_cb, so the earlier slots complete without crediting their bytes\nand BQL stalls the queue until the watchdog resets it.\n\nUnshare the skb before writing the control block.\n\nReproduce with pktgen in clone_skb mode, which hands the driver the same\nskb while earlier copies are still in the ring:\n\n modprobe pktgen\n pg=/proc/net/pktgen\n echo \"add_device eth0\" > $pg/kpktgend_0\n echo \"dst_mac AA:BB:CC:DD:EE:FF\" > $pg/eth0\n echo \"dst 192.0.2.1\" > $pg/eth0\n echo \"clone_skb 8\" > $pg/eth0\n echo \"count 0\" > $pg/eth0\n echo start > $pg/pgctrl &\n sleep 5\n echo stop > $pg/pgctrl\n wait\n cat /sys/class/net/eth0/queues/tx-0/byte_queue_limits/inflight\n\ninflight stays nonzero on the now idle queue. clone_skb 0 leaves it at\nzero."}], "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": "f48bed16a756f5bc0244acd581f61968f7d7c2a4", "lessThan": "c13d43c92bc89f494592a60e624a7c0c42218d36", "status": "affected", "versionType": "git"}, {"version": "f48bed16a756f5bc0244acd581f61968f7d7c2a4", "lessThan": "e5aa07c62e4fda1206d314c9ea36d67cd6b95cad", "status": "affected", "versionType": "git"}, {"version": "f48bed16a756f5bc0244acd581f61968f7d7c2a4", "lessThan": "2e5fb9dd3aca0da534793ad8123b81deff396efe", "status": "affected", "versionType": "git"}, {"version": "f48bed16a756f5bc0244acd581f61968f7d7c2a4", "lessThan": "40c04abcbc34e3afe338f41dae851ecbd72852ac", "status": "affected", "versionType": "git"}, {"version": "f48bed16a756f5bc0244acd581f61968f7d7c2a4", "lessThan": "7939ad3b4db9eadf45a64f0524f38337a9494672", "status": "affected", "versionType": "git"}, {"version": "f48bed16a756f5bc0244acd581f61968f7d7c2a4", "lessThan": "89771ce4f8f67dcffae561b2ccac95c0f6e3aa01", "status": "affected", "versionType": "git"}, {"version": "fb4ca2b4bc6712a6ad635df5b9b41131846589f9", "status": "affected", "versionType": "git"}, {"version": "3.16.50", "lessThan": "3.17", "status": "affected", "versionType": "semver"}]}, {"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": "4.13", "status": "affected"}, {"version": "0", "lessThan": "4.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.161", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.115", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.59", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.13", "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": "4.13", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.6.161"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.12.115"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.18.59"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "7.2.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16.50"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c13d43c92bc89f494592a60e624a7c0c42218d36"}, {"url": "https://git.kernel.org/stable/c/e5aa07c62e4fda1206d314c9ea36d67cd6b95cad"}, {"url": "https://git.kernel.org/stable/c/2e5fb9dd3aca0da534793ad8123b81deff396efe"}, {"url": "https://git.kernel.org/stable/c/40c04abcbc34e3afe338f41dae851ecbd72852ac"}, {"url": "https://git.kernel.org/stable/c/7939ad3b4db9eadf45a64f0524f38337a9494672"}, {"url": "https://git.kernel.org/stable/c/89771ce4f8f67dcffae561b2ccac95c0f6e3aa01"}], "title": "net: bcmgenet: unshare the skb before writing the control block", "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": "c13d43c92bc89f494592a60e624a7c0c42218d36", "status": "affected", "version": "f48bed16a756f5bc0244acd581f61968f7d7c2a4", "versionType": "git"}, {"lessThan": "e5aa07c62e4fda1206d314c9ea36d67cd6b95cad", "status": "affected", "version": "f48bed16a756f5bc0244acd581f61968f7d7c2a4", "versionType": "git"}, {"lessThan": "2e5fb9dd3aca0da534793ad8123b81deff396efe", "status": "affected", "version": "f48bed16a756f5bc0244acd581f61968f7d7c2a4", "versionType": "git"}, {"lessThan": "40c04abcbc34e3afe338f41dae851ecbd72852ac", "status": "affected", "version": "f48bed16a756f5bc0244acd581f61968f7d7c2a4", "versionType": "git"}, {"lessThan": "7939ad3b4db9eadf45a64f0524f38337a9494672", "status": "affected", "version": "f48bed16a756f5bc0244acd581f61968f7d7c2a4", "versionType": "git"}, {"lessThan": "89771ce4f8f67dcffae561b2ccac95c0f6e3aa01", "status": "affected", "version": "f48bed16a756f5bc0244acd581f61968f7d7c2a4", "versionType": "git"}, {"status": "affected", "version": "fb4ca2b4bc6712a6ad635df5b9b41131846589f9", "versionType": "git"}, {"lessThan": "3.17", "status": "affected", "version": "3.16.50", "versionType": "semver"}]}, {"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": "4.13"}, {"lessThan": "4.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.161", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.115", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.59", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.13", "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: unshare the skb before writing the control block\n\nbcmgenet stores first_cb, last_cb and bytes_sent in the skb control\nblock and reads them back on completion to free the skb and credit BQL.\nether_setup() leaves IFF_TX_SKB_SHARING set, so the stack can resubmit\na shared skb that is still in the ring. The next transmit overwrites\nlast_cb, so the earlier slots complete without crediting their bytes\nand BQL stalls the queue until the watchdog resets it.\n\nUnshare the skb before writing the control block.\n\nReproduce with pktgen in clone_skb mode, which hands the driver the same\nskb while earlier copies are still in the ring:\n\n modprobe pktgen\n pg=/proc/net/pktgen\n echo \"add_device eth0\" > $pg/kpktgend_0\n echo \"dst_mac AA:BB:CC:DD:EE:FF\" > $pg/eth0\n echo \"dst 192.0.2.1\" > $pg/eth0\n echo \"clone_skb 8\" > $pg/eth0\n echo \"count 0\" > $pg/eth0\n echo start > $pg/pgctrl &\n sleep 5\n echo stop > $pg/pgctrl\n wait\n cat /sys/class/net/eth0/queues/tx-0/byte_queue_limits/inflight\n\ninflight stays nonzero on the now idle queue. clone_skb 0 leaves it at\nzero."}], "id": "CVE-2026-99192", "lastModified": "2026-10-30T13:21:52.377", "metrics": {}, "published": "2026-10-28T11:17:40.207", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2e5fb9dd3aca0da534793ad8123b81deff396efe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/40c04abcbc34e3afe338f41dae851ecbd72852ac"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7939ad3b4db9eadf45a64f0524f38337a9494672"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/89771ce4f8f67dcffae561b2ccac95c0f6e3aa01"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c13d43c92bc89f494592a60e624a7c0c42218d36"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e5aa07c62e4fda1206d314c9ea36d67cd6b95cad"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: kernel: Denial of Service via shared packet buffer handling in bcmgenet", "id": "2562749", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2562749"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-820", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: bcmgenet: unshare the skb before writing the control block\nbcmgenet stores first_cb, last_cb and bytes_sent in the skb control\nblock and reads them back on completion to free the skb and credit BQL.\nether_setup() leaves IFF_TX_SKB_SHARING set, so the stack can resubmit\na shared skb that is still in the ring. The next transmit overwrites\nlast_cb, so the earlier slots complete without crediting their bytes\nand BQL stalls the queue until the watchdog resets it.\nUnshare the skb before writing the control block.\nReproduce with pktgen in clone_skb mode, which hands the driver the same\nskb while earlier copies are still in the ring:\nmodprobe pktgen\npg=/proc/net/pktgen\necho \"add_device eth0\" > $pg/kpktgend_0\necho \"dst_mac AA:BB:CC:DD:EE:FF\" > $pg/eth0\necho \"dst 192.0.2.1\" > $pg/eth0\necho \"clone_skb 8\" > $pg/eth0\necho \"count 0\" > $pg/eth0\necho start > $pg/pgctrl &\nsleep 5\necho stop > $pg/pgctrl\nwait\ncat /sys/class/net/eth0/queues/tx-0/byte_queue_limits/inflight\ninflight stays nonzero on the now idle queue. clone_skb 0 leaves it at\nzero.", "A flaw was found in the Linux kernel's Broadcom GENET (bcmgenet) ethernet driver, which can lead to a Denial of Service (DoS). When handling shared network packet buffers, the driver overwrites control block metadata while earlier packets are still pending in the transmission ring. This issue causes Byte Queue Limits (BQL) accounting to stall the network transmit queue until a watchdog timer resets the interface."], "name": "CVE-2026-99192", "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": "2026-10-28T10:35:48Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-99192\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-99192\nhttps://git.kernel.org/stable/c/40c04abcbc34e3afe338f41dae851ecbd72852ac\nhttps://git.kernel.org/stable/c/7939ad3b4db9eadf45a64f0524f38337a9494672\nhttps://git.kernel.org/stable/c/89771ce4f8f67dcffae561b2ccac95c0f6e3aa01"], "statement": "This vulnerability is rated as Moderate impact because it requires local access to trigger and exclusively impacts systems utilizing Broadcom GENET network controllers. In standard Red Hat enterprise environments, this specialized driver is not utilized on mainstream server architectures and is constrained to specific ARM platforms. An attacker can only cause a local denial of service through stalled transmission queues on the affected network interface, without compromising data confidentiality or system integrity.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f48bed16a756f5bc0244acd581f61968f7d7c2a4,40c04abcbc34e3afe338f41dae851ecbd72852ac)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f48bed16a756f5bc0244acd581f61968f7d7c2a4,7939ad3b4db9eadf45a64f0524f38337a9494672)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f48bed16a756f5bc0244acd581f61968f7d7c2a4,89771ce4f8f67dcffae561b2ccac95c0f6e3aa01)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "fb4ca2b4bc6712a6ad635df5b9b41131846589f9"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[3.16.50,3.17)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.59,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.13,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f48bed16a756f5bc0244acd581f61968f7d7c2a4,40c04abcbc34e3afe338f41dae851ecbd72852ac)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f48bed16a756f5bc0244acd581f61968f7d7c2a4,7939ad3b4db9eadf45a64f0524f38337a9494672)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f48bed16a756f5bc0244acd581f61968f7d7c2a4,89771ce4f8f67dcffae561b2ccac95c0f6e3aa01)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "fb4ca2b4bc6712a6ad635df5b9b41131846589f9"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[3.16.50,3.17)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"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": "4.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.59,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.13,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-28T12:30:17.669517+00:00", "updated": "2026-11-02T16:15:07.312015+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"]}