{"api_version":"1","generated_at":"2026-10-20T22:16:53+00:00","cve":"CVE-2026-98574","urls":{"html":"https://cve.report/CVE-2026-98574","api":"https://cve.report/api/cve/CVE-2026-98574.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98574","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98574"},"summary":{"title":"net: bcmgenet: stop Tx NAPI before disabling the queues","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bcmgenet: stop Tx NAPI before disabling the queues\n\nbcmgenet_netif_stop() and the Wake-on-LAN branch of bcmgenet_suspend()\nboth disable the Tx queues first and stop Tx NAPI several steps later. A\ncompletion in flight calls netif_tx_wake_queue() in between, and nothing\nstops the queue again, so a transmit can reach the rings after they have\nbeen freed.\n\nClose is safe because dev_deactivate_many() stops the qdisc first.\nbcmgenet_suspend() does not, so stop Tx NAPI before the queues on both\npaths.\n\nKASAN on a Raspberry Pi CM4, driven from an MTU change because suspend\nfreezes user space before the callback runs:\n\n  BUG: KASAN: use-after-free in bcmgenet_xmit+0x17f8/0x2258\n  Write of size 8 at addr ffffff8055844a68 by task ksoftirqd/0/14\n   bcmgenet_xmit+0x17f8/0x2258\n   dev_hard_start_xmit+0x13c/0x588\n   sch_direct_xmit+0x108/0x340\n   __dev_queue_xmit+0x1190/0x3848","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:09","updated_at":"2026-10-19 10:19:16"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/7e87508b5c4d81210d0a736ed01962e52f5c4c56","name":"https://git.kernel.org/stable/c/7e87508b5c4d81210d0a736ed01962e52f5c4c56","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/63bcc2fee6419963e45e7c2cd698fa862409601d","name":"https://git.kernel.org/stable/c/63bcc2fee6419963e45e7c2cd698fa862409601d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f329d42423089904758f2685cda295de9bf99441","name":"https://git.kernel.org/stable/c/f329d42423089904758f2685cda295de9bf99441","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98574","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98574","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 254f3239dd070e469f45c3ca8b6ac38e47d6c730 63bcc2fee6419963e45e7c2cd698fa862409601d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 254f3239dd070e469f45c3ca8b6ac38e47d6c730 f329d42423089904758f2685cda295de9bf99441 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 254f3239dd070e469f45c3ca8b6ac38e47d6c730 7e87508b5c4d81210d0a736ed01962e52f5c4c56 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.55 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.9 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":null,"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":"63bcc2fee6419963e45e7c2cd698fa862409601d","status":"affected","version":"254f3239dd070e469f45c3ca8b6ac38e47d6c730","versionType":"git"},{"lessThan":"f329d42423089904758f2685cda295de9bf99441","status":"affected","version":"254f3239dd070e469f45c3ca8b6ac38e47d6c730","versionType":"git"},{"lessThan":"7e87508b5c4d81210d0a736ed01962e52f5c4c56","status":"affected","version":"254f3239dd070e469f45c3ca8b6ac38e47d6c730","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":"6.15"},{"lessThan":"6.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.55","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.9","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":"6.18.55","versionStartIncluding":"6.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.9","versionStartIncluding":"6.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"6.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bcmgenet: stop Tx NAPI before disabling the queues\n\nbcmgenet_netif_stop() and the Wake-on-LAN branch of bcmgenet_suspend()\nboth disable the Tx queues first and stop Tx NAPI several steps later. A\ncompletion in flight calls netif_tx_wake_queue() in between, and nothing\nstops the queue again, so a transmit can reach the rings after they have\nbeen freed.\n\nClose is safe because dev_deactivate_many() stops the qdisc first.\nbcmgenet_suspend() does not, so stop Tx NAPI before the queues on both\npaths.\n\nKASAN on a Raspberry Pi CM4, driven from an MTU change because suspend\nfreezes user space before the callback runs:\n\n  BUG: KASAN: use-after-free in bcmgenet_xmit+0x17f8/0x2258\n  Write of size 8 at addr ffffff8055844a68 by task ksoftirqd/0/14\n   bcmgenet_xmit+0x17f8/0x2258\n   dev_hard_start_xmit+0x13c/0x588\n   sch_direct_xmit+0x108/0x340\n   __dev_queue_xmit+0x1190/0x3848"}],"providerMetadata":{"dateUpdated":"2026-10-19T09:21:59.645Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/63bcc2fee6419963e45e7c2cd698fa862409601d"},{"url":"https://git.kernel.org/stable/c/f329d42423089904758f2685cda295de9bf99441"},{"url":"https://git.kernel.org/stable/c/7e87508b5c4d81210d0a736ed01962e52f5c4c56"}],"title":"net: bcmgenet: stop Tx NAPI before disabling the queues","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98574","datePublished":"2026-10-18T15:18:39.767Z","dateReserved":"2026-09-25T10:25:14.358Z","dateUpdated":"2026-10-19T09:21:59.645Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:09","lastModifiedDate":"2026-10-19 10:19:16","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98574","Ordinal":"1","Title":"net: bcmgenet: stop Tx NAPI before disabling the queues","CVE":"CVE-2026-98574","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98574","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bcmgenet: stop Tx NAPI before disabling the queues\n\nbcmgenet_netif_stop() and the Wake-on-LAN branch of bcmgenet_suspend()\nboth disable the Tx queues first and stop Tx NAPI several steps later. A\ncompletion in flight calls netif_tx_wake_queue() in between, and nothing\nstops the queue again, so a transmit can reach the rings after they have\nbeen freed.\n\nClose is safe because dev_deactivate_many() stops the qdisc first.\nbcmgenet_suspend() does not, so stop Tx NAPI before the queues on both\npaths.\n\nKASAN on a Raspberry Pi CM4, driven from an MTU change because suspend\nfreezes user space before the callback runs:\n\n  BUG: KASAN: use-after-free in bcmgenet_xmit+0x17f8/0x2258\n  Write of size 8 at addr ffffff8055844a68 by task ksoftirqd/0/14\n   bcmgenet_xmit+0x17f8/0x2258\n   dev_hard_start_xmit+0x13c/0x588\n   sch_direct_xmit+0x108/0x340\n   __dev_queue_xmit+0x1190/0x3848","Type":"Description","Title":"net: bcmgenet: stop Tx NAPI before disabling the queues"}]}}}