CVE-2025-38604

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-38604", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.028Z", "datePublished": "2025-08-19T17:03:43.358Z", "dateUpdated": "2026-08-05T12:03:25.920Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:03:25.920Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtl818x: Kill URBs before clearing tx status queue\n\nIn rtl8187_stop() move the call of usb_kill_anchored_urbs() before clearing\nb_tx_status.queue. This change prevents callbacks from using already freed\nskb due to anchor was not killed before freeing such skb.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000080\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: Oops: 0000 [#1] SMP NOPTI\n CPU: 7 UID: 0 PID: 0 Comm: swapper/7 Not tainted 6.15.0 #8 PREEMPT(voluntary)\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015\n RIP: 0010:ieee80211_tx_status_irqsafe+0x21/0xc0 [mac80211]\n Call Trace:\n <IRQ>\n rtl8187_tx_cb+0x116/0x150 [rtl8187]\n __usb_hcd_giveback_urb+0x9d/0x120\n usb_giveback_urb_bh+0xbb/0x140\n process_one_work+0x19b/0x3c0\n bh_worker+0x1a7/0x210\n tasklet_action+0x10/0x30\n handle_softirqs+0xf0/0x340\n __irq_exit_rcu+0xcd/0xf0\n common_interrupt+0x85/0xa0\n </IRQ>\n\nTested on RTL8187BvE device.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The race is armed by locally bringing the wireless interface down (`ip link set wlan0 down` \u2192 `ieee80211_stop()` \u2192 `ieee80211_do_stop()` \u2192 `drv_stop()` \u2192 `rtl8187_stop()`) while local TX traffic keeps URBs in flight; no received 802.11 frame or routable packet can invoke the driver's stop callback, so an adjacent or remote peer cannot reach the vulnerable path.\nAC:L - The attacker owns both sides of the race \u2014 they flood the TX path to keep more than five entries in `b_tx_status.queue` (the exact precondition for the racing `skb_dequeue()` in `rtl8187_tx_cb()`'s drain loop) and then issue the interface-down, repeating the up/down cycle indefinitely until the window between the drain loop and `usb_kill_anchored_urbs()` is hit; `CONFIG_RTL8187` is a stock distro module, so no rare configuration is required.\nPR:L - Bringing the interface down requires CAP_NET_ADMIN over the network namespace owning the netdev, which an unprivileged user holds via `unshare -Ur` once the wiphy has been delegated into a container netns \u2014 the same reasoning applied to mac80211 configuration paths in CVE-2025-38642; on desktop deployments polkit additionally lets an active unprivileged session toggle WiFi through NetworkManager.\nUI:N - The attacker performs both the traffic generation and the interface down/up cycle themselves; no victim needs to open a file, mount anything, or take any other action.\nS:U - The freed/NULL sk_buff is dereferenced in the host kernel's own driver and mac80211 context, with no VM, IOMMU, or sandbox boundary crossed.\nC:H - The fix exists to stop URB completion callbacks from consuming skbs already released by `dev_kfree_skb_any()`; a freed `struct sk_buff` reallocated by a concurrent attacker-controlled allocation supplies the `ieee80211_hw *` read from `info->rate_driver_data[0]` and is then relinked into mac80211's status queues, yielding a controlled kernel-pointer dereference and read primitive.\nI:H - The same use-after-free window lets a sprayed replacement object drive `hw->priv` and the subsequent `ieee80211_tx_status_irqsafe()` queueing, and skbs re-queued by `rtl8187_tx_cb()` after the drain are later freed again, giving double-free and heap-corruption primitives exploitable for control-flow hijack.\nA:H - The reproduced impact on real RTL8187BvE hardware is a kernel oops from `ieee80211_tx_status_irqsafe()` dereferencing a NULL skb inside the USB giveback BH, which kills the softirq worker and wedges the WLAN device, and becomes a full panic on systems with `panic_on_oops`; the attacker can re-trigger it at will."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c"], "versions": [{"version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f", "lessThan": "e64732ebff9e24258e7326f07adbe2f2b990daf8", "status": "affected", "versionType": "git"}, {"version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f", "lessThan": "789415771422f4fb9f444044f86ecfaec55df1bd", "status": "affected", "versionType": "git"}, {"version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f", "lessThan": "c73c773b09e313278f9b960303a2809b8440bac6", "status": "affected", "versionType": "git"}, {"version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f", "lessThan": "8c767727f331fb9455b0f81daad832b5925688cb", "status": "affected", "versionType": "git"}, {"version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f", "lessThan": "14ca6952691fa8cc91e7644512e6ff24a595283f", "status": "affected", "versionType": "git"}, {"version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f", "lessThan": "7858a95566f4ebf59524666683d2dcdba3fca968", "status": "affected", "versionType": "git"}, {"version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f", "lessThan": "c51a45ad9070a6d296174fcbe5c466352836c12b", "status": "affected", "versionType": "git"}, {"version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f", "lessThan": "81cfe34d0630de4e23ae804dcc08fb6f861dc37d", "status": "affected", "versionType": "git"}, {"version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f", "lessThan": "16d8fd74dbfca0ea58645cd2fca13be10cae3cdd", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c"], "versions": [{"version": "2.6.29", "status": "affected"}, {"version": "0", "lessThan": "2.6.29", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.297", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.241", 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"https://git.kernel.org/stable/c/16d8fd74dbfca0ea58645cd2fca13be10cae3cdd"}], "title": "wifi: rtl818x: Kill URBs before clearing tx status queue", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T17:40:19.561Z"}}]}}

{}

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"operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtl818x: Kill URBs before clearing tx status queue\n\nIn rtl8187_stop() move the call of usb_kill_anchored_urbs() before clearing\nb_tx_status.queue. This change prevents callbacks from using already freed\nskb due to anchor was not killed before freeing such skb.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000080\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: Oops: 0000 [#1] SMP NOPTI\n CPU: 7 UID: 0 PID: 0 Comm: swapper/7 Not tainted 6.15.0 #8 PREEMPT(voluntary)\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015\n RIP: 0010:ieee80211_tx_status_irqsafe+0x21/0xc0 [mac80211]\n Call Trace:\n <IRQ>\n rtl8187_tx_cb+0x116/0x150 [rtl8187]\n __usb_hcd_giveback_urb+0x9d/0x120\n usb_giveback_urb_bh+0xbb/0x140\n process_one_work+0x19b/0x3c0\n bh_worker+0x1a7/0x210\n tasklet_action+0x10/0x30\n handle_softirqs+0xf0/0x340\n __irq_exit_rcu+0xcd/0xf0\n common_interrupt+0x85/0xa0\n </IRQ>\n\nTested on RTL8187BvE device.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: rtl818x: Eliminar URBs antes de borrar la cola de estado de la transmisi\u00f3n. En rtl8187_stop(), la llamada a usb_kill_anchored_urbs() se desplaza antes de borrar b_tx_status.queue. Este cambio impide que las devoluciones de llamada utilicen skb ya liberados, ya que el ancla no se elimin\u00f3 antes de liberar dicho skb. ERROR: kernel NULL pointer dereference, address: 0000000000000080 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP NOPTI CPU: 7 UID: 0 PID: 0 Comm: swapper/7 Not tainted 6.15.0 #8 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015 RIP: 0010:ieee80211_tx_status_irqsafe+0x21/0xc0 [mac80211] Call Trace: rtl8187_tx_cb+0x116/0x150 [rtl8187] __usb_hcd_giveback_urb+0x9d/0x120 usb_giveback_urb_bh+0xbb/0x140 process_one_work+0x19b/0x3c0 bh_worker+0x1a7/0x210 tasklet_action+0x10/0x30 handle_softirqs+0xf0/0x340 __irq_exit_rcu+0xcd/0xf0 common_interrupt+0x85/0xa0 Probado en el dispositivo RTL8187BvE. Encontrado por el Centro de Verificaci\u00f3n de Linux (linuxtesting.org) con SVACE."}], "id": "CVE-2025-38604", "lastModified": "2026-07-30T06:23:30.287", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-08-19T17:15:38.647", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/14ca6952691fa8cc91e7644512e6ff24a595283f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/16d8fd74dbfca0ea58645cd2fca13be10cae3cdd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7858a95566f4ebf59524666683d2dcdba3fca968"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/789415771422f4fb9f444044f86ecfaec55df1bd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/81cfe34d0630de4e23ae804dcc08fb6f861dc37d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8c767727f331fb9455b0f81daad832b5925688cb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c51a45ad9070a6d296174fcbe5c466352836c12b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c73c773b09e313278f9b960303a2809b8440bac6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e64732ebff9e24258e7326f07adbe2f2b990daf8"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: wifi: rtl818x: Kill URBs before clearing tx status queue", "id": "2389496", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2389496"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-38604", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-08-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38604\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38604\nhttps://lore.kernel.org/linux-cve-announce/2025081921-CVE-2025-38604-fd5d@gregkh/T"], "threat_severity": "Important"}

{"created": "2025-08-21T12:31:46.162067+00:00", "updated": "2025-08-21T12:31:46.162120+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}