{"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": "2026-10-28T10:35:48.686Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-28T10:35:48.686Z"}, "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": "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": "6.18.59", "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": "6.18.59"}, {"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/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": "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": "6.18.*", "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": "2026-10-28T11:17:40.207", "metrics": {}, "published": "2026-10-28T11:17:40.207", "references": [{"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"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"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": "2026-10-28T14:30:21.359911+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362"]}