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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
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)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
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{
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      "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."
        }
      ],
      "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": [
            {
              "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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        "dateUpdated": "2026-08-05T12:08:02.642Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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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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    "dateUpdated": "2026-08-05T12:08:02.642Z",
    "state": "PUBLISHED"
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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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/usb/rtl8150.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"cce3c0e21cdd15bcba5c35d3af1700186de8f187\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"1a08a37ac03d07a1608a1592791041cac979fbc3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"54f8ef1a970a8376e5846ed90854decf7c00555d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"114e05344763a102a8844efd96ec06ba99293ccd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"6394bade9daab8e318c165fe43bba012bf13cd8e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"6053e47bbf212b93c051beb4261d7d5a409d0ce3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"9d72df7f5eac946f853bf49c428c4e87a17d91da\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"958baf5eaee394e5fd976979b0791a875f14a179\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/usb/rtl8150.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.301\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.246\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.195\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.156\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.112\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.53\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.17.3\",\"lessThanOrEqual\":\"6.17.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}]},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "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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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.