CVE-2022-49326

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Pierre\nAsselin (pa@panix.com) reported the kernel crash in the Gentoo forum:\n\nhttps://forums.gentoo.org/viewtopic-t-1147832-postdays-0-postorder-asc-start-25.html\n\nHe also confirmed that this patch fixes the issue. In summary this happened:\n\nAfter updating wpa_supplicant from 2.9 to 2.10 the kernel crashed with a\n\"divide error: 0000\" when connecting to an AP. Control port tx now tries to\nuse IEEE80211_AC_VO for the priority, which wpa_supplicants starts to use in\n2.10.\n\nSince only the rtl8187se part of the driver supports QoS, the priority\nof the skb is set to IEEE80211_AC_BE (2) by mac80211 for rtl8180/rtl8185\ncards.\n\nrtl8180 is then unconditionally reading out the priority and finally crashes on\ndrivers/net/wireless/realtek/rtl818x/rtl8180/dev.c line 544 without this\npatch:\n\tidx = (ring->idx + skb_queue_len(&ring->queue)) % ring->entries\n\n\"ring->entries\" is zero for rtl8180/rtl8185 cards, tx_ring[2] never got\ninitialized."}], "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/rtl8180/dev.c"], "versions": [{"version": "fd6564fcdc0bfcd432e6e939f9538acc3905d08a", "lessThan": "b5dca2cd3f0239512da808598b4e70557eb4c2a1", "status": "affected", "versionType": "git"}, 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initialized queues\n\nUsing not existing queues can panic the kernel with rtl8180/rtl8185 cards.\nIgnore the skb priority for those cards, they only have one tx queue. Pierre\nAsselin (pa@panix.com) reported the kernel crash in the Gentoo forum:\n\nhttps://forums.gentoo.org/viewtopic-t-1147832-postdays-0-postorder-asc-start-25.html\n\nHe also confirmed that this patch fixes the issue. In summary this happened:\n\nAfter updating wpa_supplicant from 2.9 to 2.10 the kernel crashed with a\n\"divide error: 0000\" when connecting to an AP. Control port tx now tries to\nuse IEEE80211_AC_VO for the priority, which wpa_supplicants starts to use in\n2.10.\n\nSince only the rtl8187se part of the driver supports QoS, the priority\nof the skb is set to IEEE80211_AC_BE (2) by mac80211 for rtl8180/rtl8185\ncards.\n\nrtl8180 is then unconditionally reading out the priority and finally crashes on\ndrivers/net/wireless/realtek/rtl818x/rtl8180/dev.c line 544 without this\npatch:\n\tidx = (ring->idx + skb_queue_len(&ring->queue)) % ring->entries\n\n\"ring->entries\" is zero for rtl8180/rtl8185 cards, tx_ring[2] never got\ninitialized."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.9.318", "versionStartIncluding": "3.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.14.283", "versionStartIncluding": "3.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.19.247", "versionStartIncluding": "3.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.198", "versionStartIncluding": "3.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.121", "versionStartIncluding": "3.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.46", "versionStartIncluding": "3.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.17.14", "versionStartIncluding": "3.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.18.3", "versionStartIncluding": "3.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.19", "versionStartIncluding": "3.15"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T18:57:31.977Z"}}}, "cveMetadata": {"cveId": "CVE-2022-49326", "state": "PUBLISHED", "dateUpdated": "2026-05-11T18:57:31.977Z", "dateReserved": "2025-02-26T02:08:31.538Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-02-26T02:10:48.630Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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panic the kernel with rtl8180/rtl8185 cards.\nIgnore the skb priority for those cards, they only have one tx queue. Pierre\nAsselin (pa@panix.com) reported the kernel crash in the Gentoo forum:\n\nhttps://forums.gentoo.org/viewtopic-t-1147832-postdays-0-postorder-asc-start-25.html\n\nHe also confirmed that this patch fixes the issue. In summary this happened:\n\nAfter updating wpa_supplicant from 2.9 to 2.10 the kernel crashed with a\n\"divide error: 0000\" when connecting to an AP. Control port tx now tries to\nuse IEEE80211_AC_VO for the priority, which wpa_supplicants starts to use in\n2.10.\n\nSince only the rtl8187se part of the driver supports QoS, the priority\nof the skb is set to IEEE80211_AC_BE (2) by mac80211 for rtl8180/rtl8185\ncards.\n\nrtl8180 is then unconditionally reading out the priority and finally crashes on\ndrivers/net/wireless/realtek/rtl818x/rtl8180/dev.c line 544 without this\npatch:\n\tidx = (ring->idx + skb_queue_len(&ring->queue)) % ring->entries\n\n\"ring->entries\" is zero for rtl8180/rtl8185 cards, tx_ring[2] never got\ninitialized."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rtl818x: Evitar el uso de colas no inicializadas El uso de colas no existentes puede provocar un p\u00e1nico en el kernel con tarjetas rtl8180/rtl8185. Ignore la prioridad skb para esas tarjetas, solo tienen una cola tx. Pierre Asselin (pa@panix.com) inform\u00f3 sobre el fallo del kernel en el foro de Gentoo: https://forums.gentoo.org/viewtopic-t-1147832-postdays-0-postorder-asc-start-25.html Tambi\u00e9n confirm\u00f3 que este parche soluciona el problema. En resumen, esto sucedi\u00f3: Despu\u00e9s de actualizar wpa_supplicant de 2.9 a 2.10, el kernel se bloque\u00f3 con un \"error de divisi\u00f3n: 0000\" al conectarse a un AP. El puerto de control tx ahora intenta usar IEEE80211_AC_VO para la prioridad, que wpa_supplicants comienza a usar en 2.10. Como solo la parte rtl8187se del controlador admite QoS, la prioridad del skb se establece en IEEE80211_AC_BE (2) por mac80211 para las tarjetas rtl8180/rtl8185. Luego, rtl8180 lee incondicionalmente la prioridad y finalmente se bloquea en la l\u00ednea 544 de drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c sin este parche: idx = (ring->idx + skb_queue_len(&ring->queue)) % ring->entries \"ring->entries\" es cero para las tarjetas rtl8180/rtl8185, tx_ring[2] nunca se inicializ\u00f3."}], "id": "CVE-2022-49326", "lastModified": "2026-06-17T05:17:43.483", "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"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49326", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T19:43:30.625103Z", "version": "2.0.3"}}]}, "published": "2025-02-26T07:01:09.417", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6ad81ad0cf5744738ce94c8e64051ddd80a1734c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/746285cf81dc19502ab238249d75f5990bd2d231"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/769ec2a824deae2f1268dfda14999a4d14d0d0c5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/98e55b0b876bde3353f4e074883d66ecb55c65a3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9d5e96cc1f1720019ce27b127a31695148d38bb0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b5dca2cd3f0239512da808598b4e70557eb4c2a1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b8ce58ab80faaea015c206382041ff3bcf5495ff"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d7e30dfc166d33470bba31a42f9bbc346e5409d5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-908"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-908"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: rtl818x: Prevent using not initialized queues", "id": "2348059", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348059"}, "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"}, "cwe": "CWE-908", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nrtl818x: Prevent using not initialized queues\nUsing not existing queues can panic the kernel with rtl8180/rtl8185 cards.\nIgnore the skb priority for those cards, they only have one tx queue. Pierre\nAsselin (pa@panix.com) reported the kernel crash in the Gentoo forum:\nhttps://forums.gentoo.org/viewtopic-t-1147832-postdays-0-postorder-asc-start-25.html\nHe also confirmed that this patch fixes the issue. In summary this happened:\nAfter updating wpa_supplicant from 2.9 to 2.10 the kernel crashed with a\n\"divide error: 0000\" when connecting to an AP. Control port tx now tries to\nuse IEEE80211_AC_VO for the priority, which wpa_supplicants starts to use in\n2.10.\nSince only the rtl8187se part of the driver supports QoS, the priority\nof the skb is set to IEEE80211_AC_BE (2) by mac80211 for rtl8180/rtl8185\ncards.\nrtl8180 is then unconditionally reading out the priority and finally crashes on\ndrivers/net/wireless/realtek/rtl818x/rtl8180/dev.c line 544 without this\npatch:\nidx = (ring->idx + skb_queue_len(&ring->queue)) % ring->entries\n\"ring->entries\" is zero for rtl8180/rtl8185 cards, tx_ring[2] never got\ninitialized."], "name": "CVE-2022-49326", "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": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49326\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49326\nhttps://lore.kernel.org/linux-cve-announce/2025022638-CVE-2022-49326-7834@gregkh/T"], "threat_severity": "Moderate"}

{}