CVE-2026-43180 (GCVE-0-2026-43180)
Vulnerability from cvelistv5
Published
2026-05-06 11:27
Modified
2026-10-19 19:16
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: usb: kaweth: remove TX queue manipulation in kaweth_set_rx_mode kaweth_set_rx_mode(), the ndo_set_rx_mode callback, calls netif_stop_queue() and netif_wake_queue(). These are TX queue flow control functions unrelated to RX multicast configuration. The premature netif_wake_queue() can re-enable TX while tx_urb is still in-flight, leading to a double usb_submit_urb() on the same URB: kaweth_start_xmit() { netif_stop_queue(); usb_submit_urb(kaweth->tx_urb); } kaweth_set_rx_mode() { netif_stop_queue(); netif_wake_queue(); // wakes TX queue before URB is done } kaweth_start_xmit() { netif_stop_queue(); usb_submit_urb(kaweth->tx_urb); // URB submitted while active } This triggers the WARN in usb_submit_urb(): "URB submitted while active" This is a similar class of bug fixed in rtl8150 by - commit 958baf5eaee3 ("net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast"). Also kaweth_set_rx_mode() is already functionally broken, the real set_rx_mode action is performed by kaweth_async_set_rx_mode(), which in turn is not a no-op only at ndo_open() time.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: kaweth: remove TX queue manipulation in kaweth_set_rx_mode\n\nkaweth_set_rx_mode(), the ndo_set_rx_mode callback, calls\nnetif_stop_queue() and netif_wake_queue(). These are TX queue flow\ncontrol functions unrelated to RX multicast configuration.\n\nThe premature netif_wake_queue() can re-enable TX while tx_urb is still\nin-flight, leading to a double usb_submit_urb() on the same URB:\n\nkaweth_start_xmit() {\n    netif_stop_queue();\n    usb_submit_urb(kaweth-\u003etx_urb);\n}\n\nkaweth_set_rx_mode() {\n    netif_stop_queue();\n    netif_wake_queue();             // wakes TX queue before URB is done\n}\n\nkaweth_start_xmit() {\n    netif_stop_queue();\n    usb_submit_urb(kaweth-\u003etx_urb); // URB submitted while active\n}\n\nThis triggers the WARN in usb_submit_urb():\n\n  \"URB submitted while active\"\n\nThis is a similar class of bug fixed in rtl8150 by\n\n- commit 958baf5eaee3 (\"net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast\").\n\nAlso kaweth_set_rx_mode() is already functionally broken, the\nreal set_rx_mode action is performed by kaweth_async_set_rx_mode(),\nwhich in turn is not a no-op only at ndo_open() time."
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              "value": "AV:L - The vulnerable callback is reachable through local socket operations such as IPv4/IPv6 multicast membership changes on a host with a kaweth USB Ethernet interface. Remote network packets alone do not invoke ndo_set_rx_mode.\nAC:L - The attacker can control both sides by generating transmit traffic while repeatedly changing multicast/RX mode state. The active-URB window is repeatable and does not depend on conditions outside attacker control once the affected device is present.\nPR:L - A local unprivileged user can reach the callback through normal multicast socket membership paths without CAP_NET_ADMIN. Admin ioctl/netlink paths also exist, but they are not the least-privileged path.\nUI:N - No victim action is required after the affected interface is present and usable. The attacker can trigger both TX and RX-mode changes from their own local process.\nS:U - The impact remains within the same kernel/host security authority. This is not a VM escape, IOMMU bypass, or cross-scope boundary violation.\nC:H - The second transmit can refill an active URB and overwrite kaweth-\u003etx_skb; the failed submit frees that skb while completion later uses/frees the same pointer. Treating this kernel heap UAF/double-free as exploitable, high confidentiality impact is defensible.\nI:H - The stale skb and active URB manipulation create kernel memory corruption, not merely a clean error return. With heap shaping, this can plausibly become arbitrary write or control-flow compromise.\nA:H - At minimum the bug triggers the usb_submit_urb active-URB WARN path. The associated UAF/double-free memory corruption can also oops, panic, or hang the kernel."
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    "cveId": "CVE-2026-43180",
    "datePublished": "2026-05-06T11:27:52.983Z",
    "dateReserved": "2026-05-01T14:12:55.991Z",
    "dateUpdated": "2026-10-19T19:16:22.908Z",
    "state": "PUBLISHED"
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Remote network packets alone do not invoke ndo_set_rx_mode.\\nAC:L - The attacker can control both sides by generating transmit traffic while repeatedly changing multicast/RX mode state. The active-URB window is repeatable and does not depend on conditions outside attacker control once the affected device is present.\\nPR:L - A local unprivileged user can reach the callback through normal multicast socket membership paths without CAP_NET_ADMIN. Admin ioctl/netlink paths also exist, but they are not the least-privileged path.\\nUI:N - No victim action is required after the affected interface is present and usable. The attacker can trigger both TX and RX-mode changes from their own local process.\\nS:U - The impact remains within the same kernel/host security authority. This is not a VM escape, IOMMU bypass, or cross-scope boundary violation.\\nC:H - The second transmit can refill an active URB and overwrite kaweth-\u003etx_skb; the failed submit frees that skb while completion later uses/frees the same pointer. Treating this kernel heap UAF/double-free as exploitable, high confidentiality impact is defensible.\\nI:H - The stale skb and active URB manipulation create kernel memory corruption, not merely a clean error return. With heap shaping, this can plausibly become arbitrary write or control-flow compromise.\\nA:H - At minimum the bug triggers the usb_submit_urb active-URB WARN path. The associated UAF/double-free memory corruption can also oops, panic, or hang the kernel.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"443a830b1dc4f85c7560da59d4494b629feee215\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"586318c2730433184c6f1d21183e346ddf25e81d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"a2cd4b4db315a845a5603d08c9d03b11ddfc799d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"ef9b10a020503888eb6c8ed85a3d901a624ede4c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"9c79b839a63980c7da7ec5db895198045e154112\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"fc393af769af845d9985e2845e49553d8f015a64\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"8367c0e90126426e60581e4c07e1ec4411a0f843\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"64868f5ecadeb359a49bc4485bfa7c497047f13a\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/usb/kaweth.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.12\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.12\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.252\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.202\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.165\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.128\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.75\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.16\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"6.19.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.19.*\"}, {\"status\": \"unaffected\", \"version\": \"7.0\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/usb/kaweth.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/443a830b1dc4f85c7560da59d4494b629feee215\"}, {\"url\": \"https://git.kernel.org/stable/c/586318c2730433184c6f1d21183e346ddf25e81d\"}, {\"url\": \"https://git.kernel.org/stable/c/a2cd4b4db315a845a5603d08c9d03b11ddfc799d\"}, {\"url\": \"https://git.kernel.org/stable/c/ef9b10a020503888eb6c8ed85a3d901a624ede4c\"}, {\"url\": \"https://git.kernel.org/stable/c/9c79b839a63980c7da7ec5db895198045e154112\"}, {\"url\": \"https://git.kernel.org/stable/c/fc393af769af845d9985e2845e49553d8f015a64\"}, {\"url\": \"https://git.kernel.org/stable/c/8367c0e90126426e60581e4c07e1ec4411a0f843\"}, {\"url\": \"https://git.kernel.org/stable/c/64868f5ecadeb359a49bc4485bfa7c497047f13a\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: usb: kaweth: remove TX queue manipulation in kaweth_set_rx_mode\\n\\nkaweth_set_rx_mode(), the ndo_set_rx_mode callback, calls\\nnetif_stop_queue() and netif_wake_queue(). These are TX queue flow\\ncontrol functions unrelated to RX multicast configuration.\\n\\nThe premature netif_wake_queue() can re-enable TX while tx_urb is still\\nin-flight, leading to a double usb_submit_urb() on the same URB:\\n\\nkaweth_start_xmit() {\\n    netif_stop_queue();\\n    usb_submit_urb(kaweth-\u003etx_urb);\\n}\\n\\nkaweth_set_rx_mode() {\\n    netif_stop_queue();\\n    netif_wake_queue();             // wakes TX queue before URB is done\\n}\\n\\nkaweth_start_xmit() {\\n    netif_stop_queue();\\n    usb_submit_urb(kaweth-\u003etx_urb); // URB submitted while active\\n}\\n\\nThis triggers the WARN in usb_submit_urb():\\n\\n  \\\"URB submitted while active\\\"\\n\\nThis is a similar class of bug fixed in rtl8150 by\\n\\n- commit 958baf5eaee3 (\\\"net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast\\\").\\n\\nAlso kaweth_set_rx_mode() is already functionally broken, the\\nreal set_rx_mode action is performed by kaweth_async_set_rx_mode(),\\nwhich in turn is not a no-op only at ndo_open() time.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.252\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.202\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.165\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.128\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.75\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.16\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.19.6\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.0\", \"versionStartIncluding\": \"2.6.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T12:26:21.114Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-43180\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-19T19:16:22.908Z\", \"dateReserved\": \"2026-05-01T14:12:55.991Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-05-06T11:27:52.983Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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