CVE-2025-40000 (GCVE-0-2025-40000)

Vulnerability from cvelistv5 – Published: 2025-10-15 07:59 – Updated: 2026-08-05 12:07
VLAI
Title
wifi: rtw89: fix use-after-free in rtw89_core_tx_kick_off_and_wait()
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: fix use-after-free in rtw89_core_tx_kick_off_and_wait() There is a bug observed when rtw89_core_tx_kick_off_and_wait() tries to access already freed skb_data: BUG: KFENCE: use-after-free write in rtw89_core_tx_kick_off_and_wait drivers/net/wireless/realtek/rtw89/core.c:1110 CPU: 6 UID: 0 PID: 41377 Comm: kworker/u64:24 Not tainted 6.17.0-rc1+ #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS edk2-20250523-14.fc42 05/23/2025 Workqueue: events_unbound cfg80211_wiphy_work [cfg80211] Use-after-free write at 0x0000000020309d9d (in kfence-#251): rtw89_core_tx_kick_off_and_wait drivers/net/wireless/realtek/rtw89/core.c:1110 rtw89_core_scan_complete drivers/net/wireless/realtek/rtw89/core.c:5338 rtw89_hw_scan_complete_cb drivers/net/wireless/realtek/rtw89/fw.c:7979 rtw89_chanctx_proceed_cb drivers/net/wireless/realtek/rtw89/chan.c:3165 rtw89_chanctx_proceed drivers/net/wireless/realtek/rtw89/chan.h:141 rtw89_hw_scan_complete drivers/net/wireless/realtek/rtw89/fw.c:8012 rtw89_mac_c2h_scanofld_rsp drivers/net/wireless/realtek/rtw89/mac.c:5059 rtw89_fw_c2h_work drivers/net/wireless/realtek/rtw89/fw.c:6758 process_one_work kernel/workqueue.c:3241 worker_thread kernel/workqueue.c:3400 kthread kernel/kthread.c:463 ret_from_fork arch/x86/kernel/process.c:154 ret_from_fork_asm arch/x86/entry/entry_64.S:258 kfence-#251: 0x0000000056e2393d-0x000000009943cb62, size=232, cache=skbuff_head_cache allocated by task 41377 on cpu 6 at 77869.159548s (0.009551s ago): __alloc_skb net/core/skbuff.c:659 __netdev_alloc_skb net/core/skbuff.c:734 ieee80211_nullfunc_get net/mac80211/tx.c:5844 rtw89_core_send_nullfunc drivers/net/wireless/realtek/rtw89/core.c:3431 rtw89_core_scan_complete drivers/net/wireless/realtek/rtw89/core.c:5338 rtw89_hw_scan_complete_cb drivers/net/wireless/realtek/rtw89/fw.c:7979 rtw89_chanctx_proceed_cb drivers/net/wireless/realtek/rtw89/chan.c:3165 rtw89_chanctx_proceed drivers/net/wireless/realtek/rtw89/chan.c:3194 rtw89_hw_scan_complete drivers/net/wireless/realtek/rtw89/fw.c:8012 rtw89_mac_c2h_scanofld_rsp drivers/net/wireless/realtek/rtw89/mac.c:5059 rtw89_fw_c2h_work drivers/net/wireless/realtek/rtw89/fw.c:6758 process_one_work kernel/workqueue.c:3241 worker_thread kernel/workqueue.c:3400 kthread kernel/kthread.c:463 ret_from_fork arch/x86/kernel/process.c:154 ret_from_fork_asm arch/x86/entry/entry_64.S:258 freed by task 1045 on cpu 9 at 77869.168393s (0.001557s ago): ieee80211_tx_status_skb net/mac80211/status.c:1117 rtw89_pci_release_txwd_skb drivers/net/wireless/realtek/rtw89/pci.c:564 rtw89_pci_release_tx_skbs.isra.0 drivers/net/wireless/realtek/rtw89/pci.c:651 rtw89_pci_release_tx drivers/net/wireless/realtek/rtw89/pci.c:676 rtw89_pci_napi_poll drivers/net/wireless/realtek/rtw89/pci.c:4238 __napi_poll net/core/dev.c:7495 net_rx_action net/core/dev.c:7557 net/core/dev.c:7684 handle_softirqs kernel/softirq.c:580 do_softirq.part.0 kernel/softirq.c:480 __local_bh_enable_ip kernel/softirq.c:407 rtw89_pci_interrupt_threadfn drivers/net/wireless/realtek/rtw89/pci.c:927 irq_thread_fn kernel/irq/manage.c:1133 irq_thread kernel/irq/manage.c:1257 kthread kernel/kthread.c:463 ret_from_fork arch/x86/kernel/process.c:154 ret_from_fork_asm arch/x86/entry/entry_64.S:258 It is a consequence of a race between the waiting and the signaling side of the completion: Waiting thread Completing thread rtw89_core_tx_kick_off_and_wait() rcu_assign_pointer(skb_data->wait, wait) /* start waiting */ wait_for_completion_timeout() rtw89_pci_tx_status() rtw89_core_tx_wait_complete() rcu_read_lock() /* signals completion and ---truncated---
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
Linux Linux Affected: 1ae5ca615285d5d4f72d1de464716d85dffef19f , < 895cccf639ac015f3d5f993218cf098db82ac145 (git)
Affected: 1ae5ca615285d5d4f72d1de464716d85dffef19f , < f21f530b03b4b23448edb531a0cfea434cb76bb4 (git)
Affected: 1ae5ca615285d5d4f72d1de464716d85dffef19f , < bdb3c41b358cf87d99e39d393e164f9e4a6088e6 (git)
Affected: 1ae5ca615285d5d4f72d1de464716d85dffef19f , < 3e31a6bc07312b448fad3b45de578471f86f0e77 (git)
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Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.12.52 , ≤ 6.12.* (semver)
Unaffected: 6.16.12 , ≤ 6.16.* (semver)
Unaffected: 6.17.1 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtw89/core.c",
            "drivers/net/wireless/realtek/rtw89/core.h",
            "drivers/net/wireless/realtek/rtw89/pci.c",
            "drivers/net/wireless/realtek/rtw89/ser.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "895cccf639ac015f3d5f993218cf098db82ac145",
              "status": "affected",
              "version": "1ae5ca615285d5d4f72d1de464716d85dffef19f",
              "versionType": "git"
            },
            {
              "lessThan": "f21f530b03b4b23448edb531a0cfea434cb76bb4",
              "status": "affected",
              "version": "1ae5ca615285d5d4f72d1de464716d85dffef19f",
              "versionType": "git"
            },
            {
              "lessThan": "bdb3c41b358cf87d99e39d393e164f9e4a6088e6",
              "status": "affected",
              "version": "1ae5ca615285d5d4f72d1de464716d85dffef19f",
              "versionType": "git"
            },
            {
              "lessThan": "3e31a6bc07312b448fad3b45de578471f86f0e77",
              "status": "affected",
              "version": "1ae5ca615285d5d4f72d1de464716d85dffef19f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtw89/core.c",
            "drivers/net/wireless/realtek/rtw89/core.h",
            "drivers/net/wireless/realtek/rtw89/pci.c",
            "drivers/net/wireless/realtek/rtw89/ser.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.52",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16.12",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.1",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: fix use-after-free in rtw89_core_tx_kick_off_and_wait()\n\nThere is a bug observed when rtw89_core_tx_kick_off_and_wait() tries to\naccess already freed skb_data:\n\n BUG: KFENCE: use-after-free write in rtw89_core_tx_kick_off_and_wait drivers/net/wireless/realtek/rtw89/core.c:1110\n\n CPU: 6 UID: 0 PID: 41377 Comm: kworker/u64:24 Not tainted  6.17.0-rc1+ #1 PREEMPT(lazy)\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS edk2-20250523-14.fc42 05/23/2025\n Workqueue: events_unbound cfg80211_wiphy_work [cfg80211]\n\n Use-after-free write at 0x0000000020309d9d (in kfence-#251):\n rtw89_core_tx_kick_off_and_wait drivers/net/wireless/realtek/rtw89/core.c:1110\n rtw89_core_scan_complete drivers/net/wireless/realtek/rtw89/core.c:5338\n rtw89_hw_scan_complete_cb drivers/net/wireless/realtek/rtw89/fw.c:7979\n rtw89_chanctx_proceed_cb drivers/net/wireless/realtek/rtw89/chan.c:3165\n rtw89_chanctx_proceed drivers/net/wireless/realtek/rtw89/chan.h:141\n rtw89_hw_scan_complete drivers/net/wireless/realtek/rtw89/fw.c:8012\n rtw89_mac_c2h_scanofld_rsp drivers/net/wireless/realtek/rtw89/mac.c:5059\n rtw89_fw_c2h_work drivers/net/wireless/realtek/rtw89/fw.c:6758\n process_one_work kernel/workqueue.c:3241\n worker_thread kernel/workqueue.c:3400\n kthread kernel/kthread.c:463\n ret_from_fork arch/x86/kernel/process.c:154\n ret_from_fork_asm arch/x86/entry/entry_64.S:258\n\n kfence-#251: 0x0000000056e2393d-0x000000009943cb62, size=232, cache=skbuff_head_cache\n\n allocated by task 41377 on cpu 6 at 77869.159548s (0.009551s ago):\n __alloc_skb net/core/skbuff.c:659\n __netdev_alloc_skb net/core/skbuff.c:734\n ieee80211_nullfunc_get net/mac80211/tx.c:5844\n rtw89_core_send_nullfunc drivers/net/wireless/realtek/rtw89/core.c:3431\n rtw89_core_scan_complete drivers/net/wireless/realtek/rtw89/core.c:5338\n rtw89_hw_scan_complete_cb drivers/net/wireless/realtek/rtw89/fw.c:7979\n rtw89_chanctx_proceed_cb drivers/net/wireless/realtek/rtw89/chan.c:3165\n rtw89_chanctx_proceed drivers/net/wireless/realtek/rtw89/chan.c:3194\n rtw89_hw_scan_complete drivers/net/wireless/realtek/rtw89/fw.c:8012\n rtw89_mac_c2h_scanofld_rsp drivers/net/wireless/realtek/rtw89/mac.c:5059\n rtw89_fw_c2h_work drivers/net/wireless/realtek/rtw89/fw.c:6758\n process_one_work kernel/workqueue.c:3241\n worker_thread kernel/workqueue.c:3400\n kthread kernel/kthread.c:463\n ret_from_fork arch/x86/kernel/process.c:154\n ret_from_fork_asm arch/x86/entry/entry_64.S:258\n\n freed by task 1045 on cpu 9 at 77869.168393s (0.001557s ago):\n ieee80211_tx_status_skb net/mac80211/status.c:1117\n rtw89_pci_release_txwd_skb drivers/net/wireless/realtek/rtw89/pci.c:564\n rtw89_pci_release_tx_skbs.isra.0 drivers/net/wireless/realtek/rtw89/pci.c:651\n rtw89_pci_release_tx drivers/net/wireless/realtek/rtw89/pci.c:676\n rtw89_pci_napi_poll drivers/net/wireless/realtek/rtw89/pci.c:4238\n __napi_poll net/core/dev.c:7495\n net_rx_action net/core/dev.c:7557 net/core/dev.c:7684\n handle_softirqs kernel/softirq.c:580\n do_softirq.part.0 kernel/softirq.c:480\n __local_bh_enable_ip kernel/softirq.c:407\n rtw89_pci_interrupt_threadfn drivers/net/wireless/realtek/rtw89/pci.c:927\n irq_thread_fn kernel/irq/manage.c:1133\n irq_thread kernel/irq/manage.c:1257\n kthread kernel/kthread.c:463\n ret_from_fork arch/x86/kernel/process.c:154\n ret_from_fork_asm arch/x86/entry/entry_64.S:258\n\nIt is a consequence of a race between the waiting and the signaling side\nof the completion:\n\n            Waiting thread                            Completing thread\n\nrtw89_core_tx_kick_off_and_wait()\n  rcu_assign_pointer(skb_data-\u003ewait, wait)\n  /* start waiting */\n  wait_for_completion_timeout()\n                                                rtw89_pci_tx_status()\n                                                  rtw89_core_tx_wait_complete()\n                                                    rcu_read_lock()\n                                                    /* signals completion and\n   \n---truncated---"
        }
      ],
      "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 bug lives in the rtw89 WiFi driver and is armed/timed by over-the-air events \u2014 scan completion after deauth-forced reconnects, MCC beacon-loss probing, and medium congestion that shifts nullfunc TX-status latency into the 30 ms timeout window. An attacker must be within wireless range of the victim, which is the adjacent-network case.\nAC:L - The attacker influences both sides of the race: deauth/disassoc floods force endless scan\u2192scan-complete cycles that re-arm the UAF, while channel congestion and RX flooding tune the TX-completion latency against the 30 ms wait and delay the waiter\u0027s wakeup. Retries are free and unlimited, and the race was observed firing spontaneously under ordinary traffic in the KFENCE report.\nPR:N - Deauthentication/disassociation injection and channel congestion require no credentials on the victim network, and the scan/roam/MCC-probe paths that trigger the nullfunc TX run automatically without any attacker account on the target. No privileges of any kind are needed.\nUI:N - Background scans, roaming scans, reconnect-after-deauth, and MCC beacon-loss probing are all initiated automatically by the supplicant and firmware. The victim only needs an associated rtw89 WiFi interface, with no action on their part.\nS:U - The use-after-free corrupts kernel slab memory and is exploited entirely within the kernel\u0027s own security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is a use-after-free on a freed sk_buff in skbuff_head_cache, a cache the adjacent attacker can re-populate at will simply by transmitting frames. Corrupting length/offset/pointer fields of a replacement object can be leveraged into disclosure of kernel memory, so High is the appropriate rating for a UAF.\nI:H - The bug is an explicit use-after-free *write* \u2014 8 zero bytes at a fixed offset into a freed 232-byte slab object that the attacker can groom. Zeroing a pointer or refcount in the replacement object gives heap corruption chains suitable for control-flow hijacking, so integrity impact is High.\nA:H - The use-after-free write corrupts arbitrary reallocated slab objects and reliably produces oopses and kernel panics, as demonstrated by the KFENCE report. Any kernel crash rates High."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:07:02.267Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/895cccf639ac015f3d5f993218cf098db82ac145"
        },
        {
          "url": "https://git.kernel.org/stable/c/f21f530b03b4b23448edb531a0cfea434cb76bb4"
        },
        {
          "url": "https://git.kernel.org/stable/c/bdb3c41b358cf87d99e39d393e164f9e4a6088e6"
        },
        {
          "url": "https://git.kernel.org/stable/c/3e31a6bc07312b448fad3b45de578471f86f0e77"
        }
      ],
      "title": "wifi: rtw89: fix use-after-free in rtw89_core_tx_kick_off_and_wait()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40000",
    "datePublished": "2025-10-15T07:59:14.606Z",
    "dateReserved": "2025-04-16T07:20:57.151Z",
    "dateUpdated": "2026-08-05T12:07:02.267Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-40000",
      "date": "2026-08-07",
      "epss": "0.0025",
      "percentile": "0.16384"
    },
    "microsoft_vex": {
      "current_release_date": "2025-10-16T01:02:49.000Z",
      "cve": "CVE-2025-40000",
      "id": "msrc_CVE-2025-40000",
      "initial_release_date": "2025-10-02T00:00:00.000Z",
      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "wifi: rtw89: fix use-after-free in rtw89_core_tx_kick_off_and_wait()",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-40000.json",
      "version": "1"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40000\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-15T08:15:38.330\",\"lastModified\":\"2026-07-30T06:24:05.850\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: rtw89: fix use-after-free in rtw89_core_tx_kick_off_and_wait()\\n\\nThere is a bug observed when rtw89_core_tx_kick_off_and_wait() tries to\\naccess already freed skb_data:\\n\\n BUG: KFENCE: use-after-free write in rtw89_core_tx_kick_off_and_wait drivers/net/wireless/realtek/rtw89/core.c:1110\\n\\n CPU: 6 UID: 0 PID: 41377 Comm: kworker/u64:24 Not tainted  6.17.0-rc1+ #1 PREEMPT(lazy)\\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS edk2-20250523-14.fc42 05/23/2025\\n Workqueue: events_unbound cfg80211_wiphy_work [cfg80211]\\n\\n Use-after-free write at 0x0000000020309d9d (in kfence-#251):\\n rtw89_core_tx_kick_off_and_wait drivers/net/wireless/realtek/rtw89/core.c:1110\\n rtw89_core_scan_complete drivers/net/wireless/realtek/rtw89/core.c:5338\\n rtw89_hw_scan_complete_cb drivers/net/wireless/realtek/rtw89/fw.c:7979\\n rtw89_chanctx_proceed_cb drivers/net/wireless/realtek/rtw89/chan.c:3165\\n rtw89_chanctx_proceed drivers/net/wireless/realtek/rtw89/chan.h:141\\n rtw89_hw_scan_complete drivers/net/wireless/realtek/rtw89/fw.c:8012\\n rtw89_mac_c2h_scanofld_rsp drivers/net/wireless/realtek/rtw89/mac.c:5059\\n rtw89_fw_c2h_work drivers/net/wireless/realtek/rtw89/fw.c:6758\\n process_one_work kernel/workqueue.c:3241\\n worker_thread kernel/workqueue.c:3400\\n kthread kernel/kthread.c:463\\n ret_from_fork arch/x86/kernel/process.c:154\\n ret_from_fork_asm arch/x86/entry/entry_64.S:258\\n\\n kfence-#251: 0x0000000056e2393d-0x000000009943cb62, size=232, cache=skbuff_head_cache\\n\\n allocated by task 41377 on cpu 6 at 77869.159548s (0.009551s ago):\\n __alloc_skb net/core/skbuff.c:659\\n __netdev_alloc_skb net/core/skbuff.c:734\\n ieee80211_nullfunc_get net/mac80211/tx.c:5844\\n rtw89_core_send_nullfunc drivers/net/wireless/realtek/rtw89/core.c:3431\\n rtw89_core_scan_complete drivers/net/wireless/realtek/rtw89/core.c:5338\\n rtw89_hw_scan_complete_cb drivers/net/wireless/realtek/rtw89/fw.c:7979\\n rtw89_chanctx_proceed_cb drivers/net/wireless/realtek/rtw89/chan.c:3165\\n rtw89_chanctx_proceed drivers/net/wireless/realtek/rtw89/chan.c:3194\\n rtw89_hw_scan_complete drivers/net/wireless/realtek/rtw89/fw.c:8012\\n rtw89_mac_c2h_scanofld_rsp drivers/net/wireless/realtek/rtw89/mac.c:5059\\n rtw89_fw_c2h_work drivers/net/wireless/realtek/rtw89/fw.c:6758\\n process_one_work kernel/workqueue.c:3241\\n worker_thread kernel/workqueue.c:3400\\n kthread kernel/kthread.c:463\\n ret_from_fork arch/x86/kernel/process.c:154\\n ret_from_fork_asm arch/x86/entry/entry_64.S:258\\n\\n freed by task 1045 on cpu 9 at 77869.168393s (0.001557s ago):\\n ieee80211_tx_status_skb net/mac80211/status.c:1117\\n rtw89_pci_release_txwd_skb drivers/net/wireless/realtek/rtw89/pci.c:564\\n rtw89_pci_release_tx_skbs.isra.0 drivers/net/wireless/realtek/rtw89/pci.c:651\\n rtw89_pci_release_tx drivers/net/wireless/realtek/rtw89/pci.c:676\\n rtw89_pci_napi_poll drivers/net/wireless/realtek/rtw89/pci.c:4238\\n __napi_poll net/core/dev.c:7495\\n net_rx_action net/core/dev.c:7557 net/core/dev.c:7684\\n handle_softirqs kernel/softirq.c:580\\n do_softirq.part.0 kernel/softirq.c:480\\n __local_bh_enable_ip kernel/softirq.c:407\\n rtw89_pci_interrupt_threadfn drivers/net/wireless/realtek/rtw89/pci.c:927\\n irq_thread_fn kernel/irq/manage.c:1133\\n irq_thread kernel/irq/manage.c:1257\\n kthread kernel/kthread.c:463\\n ret_from_fork arch/x86/kernel/process.c:154\\n ret_from_fork_asm arch/x86/entry/entry_64.S:258\\n\\nIt is a consequence of a race between the waiting and the signaling side\\nof the completion:\\n\\n            Waiting thread                            Completing thread\\n\\nrtw89_core_tx_kick_off_and_wait()\\n  rcu_assign_pointer(skb_data-\u003ewait, wait)\\n  /* start waiting */\\n  wait_for_completion_timeout()\\n                                                rtw89_pci_tx_status()\\n                                                  rtw89_core_tx_wait_complete()\\n                                                    rcu_read_lock()\\n                                                    /* signals completion and\\n   \\n---truncated---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/wireless/realtek/rtw89/core.c\",\"drivers/net/wireless/realtek/rtw89/core.h\",\"drivers/net/wireless/realtek/rtw89/pci.c\",\"drivers/net/wireless/realtek/rtw89/ser.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1ae5ca615285d5d4f72d1de464716d85dffef19f\",\"lessThan\":\"895cccf639ac015f3d5f993218cf098db82ac145\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1ae5ca615285d5d4f72d1de464716d85dffef19f\",\"lessThan\":\"f21f530b03b4b23448edb531a0cfea434cb76bb4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1ae5ca615285d5d4f72d1de464716d85dffef19f\",\"lessThan\":\"bdb3c41b358cf87d99e39d393e164f9e4a6088e6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1ae5ca615285d5d4f72d1de464716d85dffef19f\",\"lessThan\":\"3e31a6bc07312b448fad3b45de578471f86f0e77\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/wireless/realtek/rtw89/core.c\",\"drivers/net/wireless/realtek/rtw89/core.h\",\"drivers/net/wireless/realtek/rtw89/pci.c\",\"drivers/net/wireless/realtek/rtw89/ser.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.52\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.16.12\",\"lessThanOrEqual\":\"6.16.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.17.1\",\"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/3e31a6bc07312b448fad3b45de578471f86f0e77\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/895cccf639ac015f3d5f993218cf098db82ac145\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bdb3c41b358cf87d99e39d393e164f9e4a6088e6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f21f530b03b4b23448edb531a0cfea434cb76bb4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-30T08:53:11+00:00",
      "cve": "CVE-2025-40000",
      "id": "CVE-2025-40000",
      "initial_release_date": "2025-10-15T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: rtw89: fix use-after-free in rtw89_core_tx_kick_off_and_wait()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40000.json",
      "version": "3"
    }
  }
}



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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.