CVE-2025-38513

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For\nexample, the following is possible:\n\n \tT0\t\t\t \t\tT1\nzd_mac_tx_to_dev()\n /* len == skb_queue_len(q) */\n while (len > ZD_MAC_MAX_ACK_WAITERS) {\n\n\t\t\t\t\t filter_ack()\n\t\t\t\t\t spin_lock_irqsave(&q->lock, flags);\n\t\t\t\t\t /* position == skb_queue_len(q) */\n\t\t\t\t\t for (i=1; i<position; i++)\n\t\t\t\t \t skb = __skb_dequeue(q)\n\n\t\t\t\t\t if (mac->type == NL80211_IFTYPE_AP)\n\t\t\t\t\t skb = __skb_dequeue(q);\n\t\t\t\t\t spin_unlock_irqrestore(&q->lock, flags);\n\n skb_dequeue() -> NULL\n\nSince there is a small gap between checking skb queue length and skb being\nunconditionally dequeued in zd_mac_tx_to_dev(), skb_dequeue() can return NULL.\nThen the pointer is passed to zd_mac_tx_status() where it is dereferenced.\n\nIn order to avoid potential NULL pointer dereference due to situations like\nabove, check if skb is not NULL before passing it to zd_mac_tx_status().\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."}], "affected": 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"https://git.kernel.org/stable/c/c1958270de947604cc6de05fc96dbba256b49cf0"}, {"url": "https://git.kernel.org/stable/c/014c34dc132015c4f918ada4982e952947ac1047"}, {"url": "https://git.kernel.org/stable/c/b24f65c184540dfb967479320ecf7e8c2e9220dc"}, {"url": "https://git.kernel.org/stable/c/adf08c96b963c7cd7ec1ee1c0c556228d9bedaae"}, {"url": "https://git.kernel.org/stable/c/5420de65efbeb6503bcf1d43451c9df67ad60298"}, {"url": "https://git.kernel.org/stable/c/fcd9c923b58e86501450b9b442ccc7ce4a8d0fda"}, {"url": "https://git.kernel.org/stable/c/602b4eb2f25668de15de69860ec99caf65b3684d"}, {"url": "https://git.kernel.org/stable/c/74b1ec9f5d627d2bdd5e5b6f3f81c23317657023"}], "title": "wifi: zd1211rw: Fix potential NULL pointer dereference in zd_mac_tx_to_dev()", "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": "2025-11-03T17:39:16.277Z"}}]}}

{}

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{"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.240", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.189", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.146", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.99", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.39", "versionType": "semver"}, {"lessThanOrEqual": "6.15.*", "status": "unaffected", "version": "6.15.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.16", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CA542DE1-DC35-467A-9B59-749FAD581273", "versionEndExcluding": "5.4.296", "versionStartIncluding": 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"85421F4E-C863-4ABF-B4B4-E887CC2F7F92", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*", "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: zd1211rw: Fix potential NULL pointer dereference in zd_mac_tx_to_dev()\n\nThere is a potential NULL pointer dereference in zd_mac_tx_to_dev(). For\nexample, the following is possible:\n\n \tT0\t\t\t \t\tT1\nzd_mac_tx_to_dev()\n /* len == skb_queue_len(q) */\n while (len > ZD_MAC_MAX_ACK_WAITERS) {\n\n\t\t\t\t\t filter_ack()\n\t\t\t\t\t spin_lock_irqsave(&q->lock, flags);\n\t\t\t\t\t /* position == skb_queue_len(q) */\n\t\t\t\t\t for (i=1; i<position; i++)\n\t\t\t\t \t skb = __skb_dequeue(q)\n\n\t\t\t\t\t if (mac->type == NL80211_IFTYPE_AP)\n\t\t\t\t\t skb = __skb_dequeue(q);\n\t\t\t\t\t spin_unlock_irqrestore(&q->lock, flags);\n\n skb_dequeue() -> NULL\n\nSince there is a small gap between checking skb queue length and skb being\nunconditionally dequeued in zd_mac_tx_to_dev(), skb_dequeue() can return NULL.\nThen the pointer is passed to zd_mac_tx_status() where it is dereferenced.\n\nIn order to avoid potential NULL pointer dereference due to situations like\nabove, check if skb is not NULL before passing it to zd_mac_tx_status().\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: zd1211rw: Se corrige una posible desreferencia de puntero NULL en zd_mac_tx_to_dev(). Existe una posible desreferencia de puntero NULL en zd_mac_tx_to_dev(). Por ejemplo, es posible lo siguiente: T0 T1 zd_mac_tx_to_dev() /* len == skb_queue_len(q) */ while (len &gt; ZD_MAC_MAX_ACK_WAITERS) { filter_ack() spin_lock_irqsave(&amp;q-&gt;lock, flags); /* position == skb_queue_len(q) */ for (i=1; itype == NL80211_IFTYPE_AP) skb = __skb_dequeue(q); spin_unlock_irqrestore(&amp;q-&gt;lock, flags); skb_dequeue() -&gt; NULL. Dado que hay una peque\u00f1a diferencia entre la comprobaci\u00f3n de la longitud de la cola de skb y su desencolado incondicional en zd_mac_tx_to_dev(), skb_dequeue() puede devolver NULL. A continuaci\u00f3n, el puntero se pasa a zd_mac_tx_status(), donde se desreferencia. Para evitar posibles desreferencias de punteros NULL debido a situaciones como la anterior, compruebe que skb no sea NULL antes de pasarlo a zd_mac_tx_status(). Encontrado por el Centro de Verificaci\u00f3n de Linux (linuxtesting.org) con SVACE."}], "id": "CVE-2025-38513", "lastModified": "2026-06-17T09:17:01.230", "metrics": {"cvssMetricV31": [{"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": "2025-08-16T11:15:44.383", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/014c34dc132015c4f918ada4982e952947ac1047"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5420de65efbeb6503bcf1d43451c9df67ad60298"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/602b4eb2f25668de15de69860ec99caf65b3684d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/74b1ec9f5d627d2bdd5e5b6f3f81c23317657023"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/adf08c96b963c7cd7ec1ee1c0c556228d9bedaae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b24f65c184540dfb967479320ecf7e8c2e9220dc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c1958270de947604cc6de05fc96dbba256b49cf0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fcd9c923b58e86501450b9b442ccc7ce4a8d0fda"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: wifi: zd1211rw: Fix potential NULL pointer dereference in zd_mac_tx_to_dev()", "id": "2391064", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2391064"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwifi: zd1211rw: Fix potential NULL pointer dereference in zd_mac_tx_to_dev()\nThere is a potential NULL pointer dereference in zd_mac_tx_to_dev(). For\nexample, the following is possible:\nT0 T1\nzd_mac_tx_to_dev()\n/* len == skb_queue_len(q) */\nwhile (len > ZD_MAC_MAX_ACK_WAITERS) {\nfilter_ack()\nspin_lock_irqsave(&q->lock, flags);\n/* position == skb_queue_len(q) */\nfor (i=1; i<position; i++)\nskb = __skb_dequeue(q)\nif (mac->type == NL80211_IFTYPE_AP)\nskb = __skb_dequeue(q);\nspin_unlock_irqrestore(&q->lock, flags);\nskb_dequeue() -> NULL\nSince there is a small gap between checking skb queue length and skb being\nunconditionally dequeued in zd_mac_tx_to_dev(), skb_dequeue() can return NULL.\nThen the pointer is passed to zd_mac_tx_status() where it is dereferenced.\nIn order to avoid potential NULL pointer dereference due to situations like\nabove, check if skb is not NULL before passing it to zd_mac_tx_status().\nFound by Linux Verification Center (linuxtesting.org) with SVACE."], "name": "CVE-2025-38513", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not 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": "2025-08-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38513\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38513\nhttps://lore.kernel.org/linux-cve-announce/2025081652-CVE-2025-38513-e205@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-08-18T20:50:02.385364+00:00", "updated": "2025-08-18T20:50:02.385447+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}