185 lines
9.5 KiB
JSON
185 lines
9.5 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-80825",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-26T14:34:25.795Z",
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"datePublished": "2026-09-04T15:54:29.224Z",
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"dateUpdated": "2026-10-19T08:44:17.799Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T08:44:17.799Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/wireless/mediatek/mt76/mt7925/mac.c"
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],
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"versions": [
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{
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"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5",
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"lessThan": "9a72b180f0575e41471e088e09bddc4b73d6dee2",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5",
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"lessThan": "22edb6786127271aeba7abd30f152977c605c6a3",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5",
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"lessThan": "8d481f93588932a95f657671d4e1601b90d130cc",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5",
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"lessThan": "e5e8fc11a7ac578f16079f855b7fffc1649d053c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5",
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"lessThan": "ef3e34874d2332d0f63e72c2c35ce5c93568c125",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/wireless/mediatek/mt76/mt7925/mac.c"
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],
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"versions": [
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{
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"version": "6.7",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.7",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.108",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.49",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.13",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.3",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.7",
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"versionEndExcluding": "6.12.108"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.7",
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"versionEndExcluding": "6.18.49"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.7",
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"versionEndExcluding": "7.1.13"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.7",
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"versionEndExcluding": "7.2.3"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.7",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/9a72b180f0575e41471e088e09bddc4b73d6dee2"
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},
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{
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"url": "https://git.kernel.org/stable/c/22edb6786127271aeba7abd30f152977c605c6a3"
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},
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{
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"url": "https://git.kernel.org/stable/c/8d481f93588932a95f657671d4e1601b90d130cc"
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},
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{
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"url": "https://git.kernel.org/stable/c/e5e8fc11a7ac578f16079f855b7fffc1649d053c"
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},
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{
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"url": "https://git.kernel.org/stable/c/ef3e34874d2332d0f63e72c2c35ce5c93568c125"
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}
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],
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"title": "wifi: mt76: mt7925: ensure tx headroom in usb_sdio_tx_prepare_skb",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |