CVE-2025-40164 (GCVE-0-2025-40164)

Vulnerability from cvelistv5 – Published: 2025-11-12 10:26 – Updated: 2026-01-30 15:35
VLAI?
Title
usbnet: Fix using smp_processor_id() in preemptible code warnings
Summary
In the Linux kernel, the following vulnerability has been resolved: usbnet: Fix using smp_processor_id() in preemptible code warnings Syzbot reported the following warning: BUG: using smp_processor_id() in preemptible [00000000] code: dhcpcd/2879 caller is usbnet_skb_return+0x74/0x490 drivers/net/usb/usbnet.c:331 CPU: 1 UID: 0 PID: 2879 Comm: dhcpcd Not tainted 6.15.0-rc4-syzkaller-00098-g615dca38c2ea #0 PREEMPT(voluntary) Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120 check_preemption_disabled+0xd0/0xe0 lib/smp_processor_id.c:49 usbnet_skb_return+0x74/0x490 drivers/net/usb/usbnet.c:331 usbnet_resume_rx+0x4b/0x170 drivers/net/usb/usbnet.c:708 usbnet_change_mtu+0x1be/0x220 drivers/net/usb/usbnet.c:417 __dev_set_mtu net/core/dev.c:9443 [inline] netif_set_mtu_ext+0x369/0x5c0 net/core/dev.c:9496 netif_set_mtu+0xb0/0x160 net/core/dev.c:9520 dev_set_mtu+0xae/0x170 net/core/dev_api.c:247 dev_ifsioc+0xa31/0x18d0 net/core/dev_ioctl.c:572 dev_ioctl+0x223/0x10e0 net/core/dev_ioctl.c:821 sock_do_ioctl+0x19d/0x280 net/socket.c:1204 sock_ioctl+0x42f/0x6a0 net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f For historical and portability reasons, the netif_rx() is usually run in the softirq or interrupt context, this commit therefore add local_bh_disable/enable() protection in the usbnet_resume_rx().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 43daa96b166c3cf5ff30dfac0c5efa2620e4beab , < 17fbad93879e87a334062882b45fa727ba1b3dd7 (git)
Affected: 43daa96b166c3cf5ff30dfac0c5efa2620e4beab , < d1944bab8e0c1511f0cbf364aa06547735bb0ddb (git)
Affected: 43daa96b166c3cf5ff30dfac0c5efa2620e4beab , < 0134c7bff14bd50314a4f92b182850ddfc38e255 (git)
Affected: 43daa96b166c3cf5ff30dfac0c5efa2620e4beab , < 327cd4b68b4398b6c24f10eb2b2533ffbfc10185 (git)
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    Linux Linux Affected: 4.7
Unaffected: 0 , < 4.7 (semver)
Unaffected: 6.6.122 , ≤ 6.6.* (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.17.5 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/usb/usbnet.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "semver"
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              "version": "6.12.64",
              "versionType": "semver"
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              "versionType": "semver"
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              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusbnet: Fix using smp_processor_id() in preemptible code warnings\n\nSyzbot reported the following warning:\n\nBUG: using smp_processor_id() in preemptible [00000000] code: dhcpcd/2879\ncaller is usbnet_skb_return+0x74/0x490 drivers/net/usb/usbnet.c:331\nCPU: 1 UID: 0 PID: 2879 Comm: dhcpcd Not tainted 6.15.0-rc4-syzkaller-00098-g615dca38c2ea #0 PREEMPT(voluntary)\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120\n check_preemption_disabled+0xd0/0xe0 lib/smp_processor_id.c:49\n usbnet_skb_return+0x74/0x490 drivers/net/usb/usbnet.c:331\n usbnet_resume_rx+0x4b/0x170 drivers/net/usb/usbnet.c:708\n usbnet_change_mtu+0x1be/0x220 drivers/net/usb/usbnet.c:417\n __dev_set_mtu net/core/dev.c:9443 [inline]\n netif_set_mtu_ext+0x369/0x5c0 net/core/dev.c:9496\n netif_set_mtu+0xb0/0x160 net/core/dev.c:9520\n dev_set_mtu+0xae/0x170 net/core/dev_api.c:247\n dev_ifsioc+0xa31/0x18d0 net/core/dev_ioctl.c:572\n dev_ioctl+0x223/0x10e0 net/core/dev_ioctl.c:821\n sock_do_ioctl+0x19d/0x280 net/socket.c:1204\n sock_ioctl+0x42f/0x6a0 net/socket.c:1311\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:906 [inline]\n __se_sys_ioctl fs/ioctl.c:892 [inline]\n __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nFor historical and portability reasons, the netif_rx() is usually\nrun in the softirq or interrupt context, this commit therefore add\nlocal_bh_disable/enable() protection in the usbnet_resume_rx()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-30T15:35:34.628Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/17fbad93879e87a334062882b45fa727ba1b3dd7"
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          "url": "https://git.kernel.org/stable/c/d1944bab8e0c1511f0cbf364aa06547735bb0ddb"
        },
        {
          "url": "https://git.kernel.org/stable/c/0134c7bff14bd50314a4f92b182850ddfc38e255"
        },
        {
          "url": "https://git.kernel.org/stable/c/327cd4b68b4398b6c24f10eb2b2533ffbfc10185"
        }
      ],
      "title": "usbnet: Fix using smp_processor_id() in preemptible code warnings",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40164",
    "datePublished": "2025-11-12T10:26:23.482Z",
    "dateReserved": "2025-04-16T07:20:57.176Z",
    "dateUpdated": "2026-01-30T15:35:34.628Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40164\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-11-12T11:15:46.660\",\"lastModified\":\"2026-01-30T10:15:55.310\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusbnet: Fix using smp_processor_id() in preemptible code warnings\\n\\nSyzbot reported the following warning:\\n\\nBUG: using smp_processor_id() in preemptible [00000000] code: dhcpcd/2879\\ncaller is usbnet_skb_return+0x74/0x490 drivers/net/usb/usbnet.c:331\\nCPU: 1 UID: 0 PID: 2879 Comm: dhcpcd Not tainted 6.15.0-rc4-syzkaller-00098-g615dca38c2ea #0 PREEMPT(voluntary)\\nCall Trace:\\n \u003cTASK\u003e\\n __dump_stack lib/dump_stack.c:94 [inline]\\n dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120\\n check_preemption_disabled+0xd0/0xe0 lib/smp_processor_id.c:49\\n usbnet_skb_return+0x74/0x490 drivers/net/usb/usbnet.c:331\\n usbnet_resume_rx+0x4b/0x170 drivers/net/usb/usbnet.c:708\\n usbnet_change_mtu+0x1be/0x220 drivers/net/usb/usbnet.c:417\\n __dev_set_mtu net/core/dev.c:9443 [inline]\\n netif_set_mtu_ext+0x369/0x5c0 net/core/dev.c:9496\\n netif_set_mtu+0xb0/0x160 net/core/dev.c:9520\\n dev_set_mtu+0xae/0x170 net/core/dev_api.c:247\\n dev_ifsioc+0xa31/0x18d0 net/core/dev_ioctl.c:572\\n dev_ioctl+0x223/0x10e0 net/core/dev_ioctl.c:821\\n sock_do_ioctl+0x19d/0x280 net/socket.c:1204\\n sock_ioctl+0x42f/0x6a0 net/socket.c:1311\\n vfs_ioctl fs/ioctl.c:51 [inline]\\n __do_sys_ioctl fs/ioctl.c:906 [inline]\\n __se_sys_ioctl fs/ioctl.c:892 [inline]\\n __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892\\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\\n do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\nFor historical and portability reasons, the netif_rx() is usually\\nrun in the softirq or interrupt context, this commit therefore add\\nlocal_bh_disable/enable() protection in the usbnet_resume_rx().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0134c7bff14bd50314a4f92b182850ddfc38e255\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/17fbad93879e87a334062882b45fa727ba1b3dd7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/327cd4b68b4398b6c24f10eb2b2533ffbfc10185\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d1944bab8e0c1511f0cbf364aa06547735bb0ddb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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