{"api_version":"1","generated_at":"2026-11-10T06:37:32+00:00","cve":"CVE-2026-99192","urls":{"html":"https://cve.report/CVE-2026-99192","api":"https://cve.report/api/cve/CVE-2026-99192.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-99192","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-99192"},"summary":{"title":"net: bcmgenet: unshare the skb before writing the control block","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-28 11:17:40","updated_at":"2026-10-30 13:21:52"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/40c04abcbc34e3afe338f41dae851ecbd72852ac","name":"https://git.kernel.org/stable/c/40c04abcbc34e3afe338f41dae851ecbd72852ac","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2e5fb9dd3aca0da534793ad8123b81deff396efe","name":"https://git.kernel.org/stable/c/2e5fb9dd3aca0da534793ad8123b81deff396efe","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e5aa07c62e4fda1206d314c9ea36d67cd6b95cad","name":"https://git.kernel.org/stable/c/e5aa07c62e4fda1206d314c9ea36d67cd6b95cad","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/89771ce4f8f67dcffae561b2ccac95c0f6e3aa01","name":"https://git.kernel.org/stable/c/89771ce4f8f67dcffae561b2ccac95c0f6e3aa01","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7939ad3b4db9eadf45a64f0524f38337a9494672","name":"https://git.kernel.org/stable/c/7939ad3b4db9eadf45a64f0524f38337a9494672","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c13d43c92bc89f494592a60e624a7c0c42218d36","name":"https://git.kernel.org/stable/c/c13d43c92bc89f494592a60e624a7c0c42218d36","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-99192","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99192","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f48bed16a756f5bc0244acd581f61968f7d7c2a4 c13d43c92bc89f494592a60e624a7c0c42218d36 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f48bed16a756f5bc0244acd581f61968f7d7c2a4 e5aa07c62e4fda1206d314c9ea36d67cd6b95cad git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f48bed16a756f5bc0244acd581f61968f7d7c2a4 2e5fb9dd3aca0da534793ad8123b81deff396efe git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f48bed16a756f5bc0244acd581f61968f7d7c2a4 40c04abcbc34e3afe338f41dae851ecbd72852ac git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f48bed16a756f5bc0244acd581f61968f7d7c2a4 7939ad3b4db9eadf45a64f0524f38337a9494672 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f48bed16a756f5bc0244acd581f61968f7d7c2a4 89771ce4f8f67dcffae561b2ccac95c0f6e3aa01 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fb4ca2b4bc6712a6ad635df5b9b41131846589f9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.16.50 3.17 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.191 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.161 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.115 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.59 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.13 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"99192","cve":"CVE-2026-99192","epss":"0.001790000","percentile":"0.074770000","score_date":"2026-11-01","updated_at":"2026-11-02 00:05:55"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"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"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.191","versionStartIncluding":"4.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.161","versionStartIncluding":"4.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.115","versionStartIncluding":"4.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.59","versionStartIncluding":"4.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.13","versionStartIncluding":"4.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"4.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16.50","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-10-30T12:42:50.060Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-99192","datePublished":"2026-10-28T10:35:48.686Z","dateReserved":"2026-09-25T10:25:14.400Z","dateUpdated":"2026-10-30T12:42:50.060Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-28 11:17:40","lastModifiedDate":"2026-10-30 13:21:52","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"99192","Ordinal":"1","Title":"net: bcmgenet: unshare the skb before writing the control block","CVE":"CVE-2026-99192","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"99192","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"net: bcmgenet: unshare the skb before writing the control block"}]}}}