CVE-2025-40140 (GCVE-0-2025-40140)

Vulnerability from cvelistv5 – Published: 2025-11-12 10:23 – Updated: 2026-08-05 12:08
VLAI
Title
net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast
Summary
In the Linux kernel, the following vulnerability has been resolved: net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast syzbot reported WARNING in rtl8150_start_xmit/usb_submit_urb. This is the sequence of events that leads to the warning: rtl8150_start_xmit() { netif_stop_queue(); usb_submit_urb(dev->tx_urb); } rtl8150_set_multicast() { netif_stop_queue(); netif_wake_queue(); <-- wakes up TX queue before URB is done } rtl8150_start_xmit() { netif_stop_queue(); usb_submit_urb(dev->tx_urb); <-- double submission } rtl8150_set_multicast being the ndo_set_rx_mode callback should not be calling netif_stop_queue and notif_start_queue as these handle TX queue synchronization. The net core function dev_set_rx_mode handles the synchronization for rtl8150_set_multicast making it safe to remove these locks.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7034 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cce3c0e21cdd15bcba5c35d3af1700186de8f187 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1a08a37ac03d07a1608a1592791041cac979fbc3 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 54f8ef1a970a8376e5846ed90854decf7c00555d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 114e05344763a102a8844efd96ec06ba99293ccd (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6394bade9daab8e318c165fe43bba012bf13cd8e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6053e47bbf212b93c051beb4261d7d5a409d0ce3 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9d72df7f5eac946f853bf49c428c4e87a17d91da (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 958baf5eaee394e5fd976979b0791a875f14a179 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.4.301 , ≤ 5.4.* (semver)
Unaffected: 5.10.246 , ≤ 5.10.* (semver)
Unaffected: 5.15.195 , ≤ 5.15.* (semver)
Unaffected: 6.1.156 , ≤ 6.1.* (semver)
Unaffected: 6.6.112 , ≤ 6.6.* (semver)
Unaffected: 6.12.53 , ≤ 6.12.* (semver)
Unaffected: 6.17.3 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast\n\nsyzbot reported WARNING in rtl8150_start_xmit/usb_submit_urb.\nThis is the sequence of events that leads to the warning:\n\nrtl8150_start_xmit() {\n\tnetif_stop_queue();\n\tusb_submit_urb(dev-\u003etx_urb);\n}\n\nrtl8150_set_multicast() {\n\tnetif_stop_queue();\n\tnetif_wake_queue();\t\t\u003c-- wakes up TX queue before URB is done\n}\n\nrtl8150_start_xmit() {\n\tnetif_stop_queue();\n\tusb_submit_urb(dev-\u003etx_urb);\t\u003c-- double submission\n}\n\nrtl8150_set_multicast being the ndo_set_rx_mode callback should not be\ncalling netif_stop_queue and notif_start_queue as these handle\nTX queue synchronization.\n\nThe net core function dev_set_rx_mode handles the synchronization\nfor rtl8150_set_multicast making it safe to remove these locks."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
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              "lang": "en",
              "value": "AV:A - The buggy `ndo_set_rx_mode` callback is reachable from an unauthenticated attacker on the same L2 segment: flooding IPv6 Router Advertisements with fresh prefixes drives SLAAC address creation \u2192 `addrconf_join_solict()` \u2192 `ipv6_dev_mc_inc` \u2192 `igmp6_group_added` \u2192 `dev_mc_add` \u2192 `__dev_set_rx_mode` \u2192 `rtl8150_set_multicast`, while the same attacker keeps a TX URB in flight by eliciting ICMP/ARP/RST replies. RAs are link-local and non-routable, so Adjacent rather than Network; the vector is the network stack, not the USB bus.\nAC:L - The attacker controls both sides of the race \u2014 they generate the TX load that guarantees an in-flight URB and drive rx_mode changes at an arbitrary rate \u2014 and the attempt is freely repeatable. The window between `urb-\u003ehcpriv = NULL` and `urb-\u003ecomplete()` in `__usb_hcd_giveback_urb()` is widened further by bulk giveback being deferred to a BH workqueue.\nPR:N - IPv6 Router Advertisement processing is unauthenticated by design and `accept_ra=1` is the default on non-forwarding hosts, so no credentials of any kind are needed on the adjacent path. Even the purely local path requires only an unprivileged `setsockopt(IP_ADD_MEMBERSHIP)` loop with no capabilities.\nUI:N - The kernel processes Router Advertisements and performs the resulting solicited-node multicast joins automatically in softirq on packet receive. No victim action is required at any point.\nS:U - The corruption is confined to kernel memory of the affected host, within the same security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The use-after-free leaves the HCD DMA-ing from a freed sk_buff data buffer and transmitting its contents onto the attacker\u0027s network segment, directly leaking reallocated kernel heap memory. Per guidance, a UAF also generically warrants C:H because it gives the attacker control over freed-object contents.\nI:H - The double free of an sk_buff corrupts the `skbuff_head_cache` slab freelist, a well-known heap-shaping and arbitrary-write primitive, and the still-queued URB writes/reads memory that can be reallocated to other kernel users mid-transfer.\nA:H - The reported `WARN_ONCE(\"URB submitted while active\")` is a kernel oops and a full panic under `panic_on_warn=1`, which is set in many hardened and production configurations. The UAF and double free crash the kernel outright, and the TX path is additionally left leaking sk_buffs."
            }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/114e05344763a102a8844efd96ec06ba99293ccd"
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        {
          "url": "https://git.kernel.org/stable/c/958baf5eaee394e5fd976979b0791a875f14a179"
        }
      ],
      "title": "net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast",
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        "engine": "bippy-1.2.0"
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    "datePublished": "2025-11-12T10:23:24.586Z",
    "dateReserved": "2025-04-16T07:20:57.171Z",
    "dateUpdated": "2026-08-05T12:08:02.642Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2",
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      "date": "2026-10-28",
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast\n\nsyzbot reported WARNING in rtl8150_start_xmit/usb_submit_urb.\nThis is the sequence of events that leads to the warning:\n\nrtl8150_start_xmit() {\n\tnetif_stop_queue();\n\tusb_submit_urb(dev-\u003etx_urb);\n}\n\nrtl8150_set_multicast() {\n\tnetif_stop_queue();\n\tnetif_wake_queue();\t\t\u003c-- wakes up TX queue before URB is done\n}\n\nrtl8150_start_xmit() {\n\tnetif_stop_queue();\n\tusb_submit_urb(dev-\u003etx_urb);\t\u003c-- double submission\n}\n\nrtl8150_set_multicast being the ndo_set_rx_mode callback should not be\ncalling netif_stop_queue and notif_start_queue as these handle\nTX queue synchronization.\n\nThe net core function dev_set_rx_mode handles the synchronization\nfor rtl8150_set_multicast making it safe to remove these locks."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: usb: Eliminar la disruptiva netif_wake_queue en rtl8150_set_multicast\n\nsyzbot inform\u00f3 de una ADVERTENCIA en rtl8150_start_xmit/usb_submit_urb.\nEsta es la secuencia de eventos que conduce a la advertencia:\n\nrtl8150_start_xmit() {\n\tnetif_stop_queue();\n\tusb_submit_urb(dev-\u003etx_urb);\n}\n\nrtl8150_set_multicast() {\n\tnetif_stop_queue();\n\tnetif_wake_queue();\t\t\u003c-- activa la cola TX antes de que el URB termine\n}\n\nrtl8150_start_xmit() {\n\tnetif_stop_queue();\n\tusb_submit_urb(dev-\u003etx_urb);\t\u003c-- doble env\u00edo\n}\n\nrtl8150_set_multicast, al ser la funci\u00f3n de callback ndo_set_rx_mode, no deber\u00eda estar llamando a netif_stop_queue y notif_start_queue, puesto que estas gestionan la sincronizaci\u00f3n de la cola TX.\n\nLa funci\u00f3n del n\u00facleo de red dev_set_rx_mode gestiona la sincronizaci\u00f3n para rtl8150_set_multicast, haciendo que sea seguro eliminar estos bloqueos."
          }
        ],
        "id": "CVE-2025-40140",
        "lastModified": "2026-10-19T21:10:00.160",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "ADJACENT_NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2025-11-12T11:15:43.790",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/114e05344763a102a8844efd96ec06ba99293ccd"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/1a08a37ac03d07a1608a1592791041cac979fbc3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/54f8ef1a970a8376e5846ed90854decf7c00555d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/6053e47bbf212b93c051beb4261d7d5a409d0ce3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/6394bade9daab8e318c165fe43bba012bf13cd8e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/958baf5eaee394e5fd976979b0791a875f14a179"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/9d72df7f5eac946f853bf49c428c4e87a17d91da"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/cce3c0e21cdd15bcba5c35d3af1700186de8f187"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-30T08:48:27+00:00",
      "cve": "CVE-2025-40140",
      "id": "CVE-2025-40140",
      "initial_release_date": "2025-11-12T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40140.json",
      "version": "3"
    }
  }
}



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