{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80825", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.795Z", "datePublished": "2026-09-04T15:54:29.224Z", "dateUpdated": "2026-09-04T15:54:29.224Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-04T15:54:29.224Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7925: ensure tx headroom in usb_sdio_tx_prepare_skb\n\nmt7925_usb_sdio_tx_prepare_skb() pushes a TX descriptor and a USB\nheader onto every skb and assumes the headroom for them is already\nthere. That holds for locally generated traffic, where mac80211\nreserves hw->extra_tx_headroom, but forwarded frames are sent through\nieee80211_8023_xmit(), which does not reserve it. Bridge a wired\ninterface to an mt7925u AP and the first forwarded frame that arrives\nshort panics the kernel:\n\n skbuff: skb_under_panic: len:415 put:4 tail:0x19b end:0x640 dev:wlan1\n kernel BUG at net/core/skbuff.c:212!\n Call trace:\n skb_panic+0x58/0x60 (P)\n skb_push+0x58/0x60\n mt7925_usb_sdio_tx_prepare_skb+0xf8/0x1b8 [mt7925_common]\n mt76u_tx_queue_skb+0xa0/0x1f8 [mt76_usb]\n __mt76_tx_queue_skb+0x54/0xe8 [mt76]\n mt76_txq_schedule.part.0+0x204/0x478 [mt76]\n mt76_txq_schedule_all+0x50/0x80 [mt76]\n mt792x_tx_worker+0x68/0x100 [mt792x_lib]\n __mt76_worker_fn+0x84/0x150 [mt76]\n\nWhether a given setup hits it depends on how much headroom the ingress\nnetdev leaves in its rx skbs. Reproduced on a Raspberry Pi 5 bridging\nonboard ethernet to a Netgear A9000; originally reported on an MT7986\nrouter running OpenWrt. Nick Morrow's testing on a Pi 4 (bcmgenet),\nwhich leaves more headroom, helped narrow the trigger to the ingress\npath.\n\nThe same bug was fixed on mt7921 by commit 98c4d0abf5c4 (\"mt76:\nmt7921: don't assume adequate headroom for SDIO headers\"), but mt7925\nwas copied from mt7921 without the fix. Add the same guard here."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7925/mac.c"], "versions": [{"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5", "lessThan": "9a72b180f0575e41471e088e09bddc4b73d6dee2", "status": "affected", "versionType": "git"}, {"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5", "lessThan": "22edb6786127271aeba7abd30f152977c605c6a3", "status": "affected", "versionType": "git"}, {"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5", "lessThan": "8d481f93588932a95f657671d4e1601b90d130cc", "status": "affected", "versionType": "git"}, {"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5", "lessThan": "e5e8fc11a7ac578f16079f855b7fffc1649d053c", "status": "affected", "versionType": "git"}, {"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5", "lessThan": "ef3e34874d2332d0f63e72c2c35ce5c93568c125", "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/wireless/mediatek/mt76/mt7925/mac.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.108", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.49", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.13", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.3", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "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": "6.7", "versionEndExcluding": "6.12.108"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.18.49"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.1.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.2.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/9a72b180f0575e41471e088e09bddc4b73d6dee2"}, {"url": "https://git.kernel.org/stable/c/22edb6786127271aeba7abd30f152977c605c6a3"}, {"url": "https://git.kernel.org/stable/c/8d481f93588932a95f657671d4e1601b90d130cc"}, {"url": "https://git.kernel.org/stable/c/e5e8fc11a7ac578f16079f855b7fffc1649d053c"}, {"url": "https://git.kernel.org/stable/c/ef3e34874d2332d0f63e72c2c35ce5c93568c125"}], "title": "wifi: mt76: mt7925: ensure tx headroom in usb_sdio_tx_prepare_skb", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7925/mac.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "9a72b180f0575e41471e088e09bddc4b73d6dee2", "status": "affected", "version": "c948b5da6bbec742b433138e3e3f9537a85af2e5", "versionType": "git"}, {"lessThan": "22edb6786127271aeba7abd30f152977c605c6a3", "status": "affected", "version": "c948b5da6bbec742b433138e3e3f9537a85af2e5", "versionType": "git"}, {"lessThan": "8d481f93588932a95f657671d4e1601b90d130cc", "status": "affected", "version": "c948b5da6bbec742b433138e3e3f9537a85af2e5", "versionType": "git"}, {"lessThan": "e5e8fc11a7ac578f16079f855b7fffc1649d053c", "status": "affected", "version": "c948b5da6bbec742b433138e3e3f9537a85af2e5", "versionType": "git"}, {"lessThan": "ef3e34874d2332d0f63e72c2c35ce5c93568c125", "status": "affected", "version": "c948b5da6bbec742b433138e3e3f9537a85af2e5", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7925/mac.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.7"}, {"lessThan": "6.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.108", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.49", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.13", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "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\nwifi: mt76: mt7925: ensure tx headroom in usb_sdio_tx_prepare_skb\n\nmt7925_usb_sdio_tx_prepare_skb() pushes a TX descriptor and a USB\nheader onto every skb and assumes the headroom for them is already\nthere. That holds for locally generated traffic, where mac80211\nreserves hw->extra_tx_headroom, but forwarded frames are sent through\nieee80211_8023_xmit(), which does not reserve it. Bridge a wired\ninterface to an mt7925u AP and the first forwarded frame that arrives\nshort panics the kernel:\n\n skbuff: skb_under_panic: len:415 put:4 tail:0x19b end:0x640 dev:wlan1\n kernel BUG at net/core/skbuff.c:212!\n Call trace:\n skb_panic+0x58/0x60 (P)\n skb_push+0x58/0x60\n mt7925_usb_sdio_tx_prepare_skb+0xf8/0x1b8 [mt7925_common]\n mt76u_tx_queue_skb+0xa0/0x1f8 [mt76_usb]\n __mt76_tx_queue_skb+0x54/0xe8 [mt76]\n mt76_txq_schedule.part.0+0x204/0x478 [mt76]\n mt76_txq_schedule_all+0x50/0x80 [mt76]\n mt792x_tx_worker+0x68/0x100 [mt792x_lib]\n __mt76_worker_fn+0x84/0x150 [mt76]\n\nWhether a given setup hits it depends on how much headroom the ingress\nnetdev leaves in its rx skbs. Reproduced on a Raspberry Pi 5 bridging\nonboard ethernet to a Netgear A9000; originally reported on an MT7986\nrouter running OpenWrt. Nick Morrow's testing on a Pi 4 (bcmgenet),\nwhich leaves more headroom, helped narrow the trigger to the ingress\npath.\n\nThe same bug was fixed on mt7921 by commit 98c4d0abf5c4 (\"mt76:\nmt7921: don't assume adequate headroom for SDIO headers\"), but mt7925\nwas copied from mt7921 without the fix. Add the same guard here."}], "id": "CVE-2026-80825", "lastModified": "2026-09-04T16:18:10.410", "metrics": {}, "published": "2026-09-04T16:18:10.410", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/22edb6786127271aeba7abd30f152977c605c6a3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8d481f93588932a95f657671d4e1601b90d130cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9a72b180f0575e41471e088e09bddc4b73d6dee2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e5e8fc11a7ac578f16079f855b7fffc1649d053c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ef3e34874d2332d0f63e72c2c35ce5c93568c125"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}