CVE-2025-40000 (GCVE-0-2025-40000)
Vulnerability from cvelistv5
Published
2025-10-15 07:59
Modified
2025-10-15 07:59
Severity ?
VLAI Severity ?
EPSS score ?
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---
References
Impacted products
{
"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-rc1",
"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-rc1",
"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---"
}
],
"providerMetadata": {
"dateUpdated": "2025-10-15T07:59:14.606Z",
"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": "2025-10-15T07:59:14.606Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-40000\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-15T08:15:38.330\",\"lastModified\":\"2025-10-16T15:28:59.610\",\"vulnStatus\":\"Awaiting Analysis\",\"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---\"}],\"metrics\":{},\"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\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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