CVE-2022-49479

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This is same-segment wireless reachability, not internet-remote (N) or host-local-only (L).\nAC:L - The attacker can drive both sides of the race\u2014generate traffic that queues TX-status skbs and force station removal via disconnect/deauth\u2014so success does not depend on conditions outside their control. Per guidance, attacker-controlled races and UAFs score AC:L.\nPR:N - Station removal and in-flight TX are reachable from the wireless medium (peer deauth/disassoc or a client leaving) with no privileges on the host kernel. No CAP_NET_ADMIN or local account is required in the AP/hotspot worst case.\nUI:N - Exploitation needs no victim user action beyond normal network operation; the attacker triggers disconnect and concurrent TX themselves.\nS:U - This is in-kernel memory corruption/privilege escalation within the host kernel\u2019s security authority, not a VM/IOMMU/sandbox boundary crossing.\nC:H - The race re-links a freed wcid into the TX-status poll list (use-after-free); UAF enables control of freed object contents and thus arbitrary read primitives.\nI:H - The same wcid UAF is heap memory corruption exploitable for arbitrary write / control-flow hijack via status-list processing after station free.\nA:H - Use-after-free on the status poll path can oops/panic the kernel even without full exploitation, so availability impact is High."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/mediatek/mt76/mac80211.c", "drivers/net/wireless/mediatek/mt76/tx.c"], "versions": [{"version": "bd1e3e7b693c17a04e7d2bd9119daa482b7c7720", "lessThan": "ef7f9f894cfd0b2e471206409a529af4a26ddd55", "status": "affected", "versionType": "git"}, {"version": "bd1e3e7b693c17a04e7d2bd9119daa482b7c7720", "lessThan": "ddd426d72aca4054045a9bd3b80a4ce1d398f11f", "status": "affected", "versionType": "git"}, {"version": "bd1e3e7b693c17a04e7d2bd9119daa482b7c7720", "lessThan": "fcfe1b5e162bf473c1d47760962cec8523c00466", "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/mediatek/mt76/mac80211.c", "drivers/net/wireless/mediatek/mt76/tx.c"], "versions": [{"version": "5.16", "status": "affected"}, {"version": "0", "lessThan": "5.16", "status": "unaffected", "versionType": "semver"}, {"version": "5.17.14", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18.3", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "5.17.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "5.18.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "5.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ef7f9f894cfd0b2e471206409a529af4a26ddd55"}, {"url": "https://git.kernel.org/stable/c/ddd426d72aca4054045a9bd3b80a4ce1d398f11f"}, {"url": "https://git.kernel.org/stable/c/fcfe1b5e162bf473c1d47760962cec8523c00466"}], "title": "mt76: fix tx status related use-after-free race on station removal", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-49479", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-02-27T18:15:50.287677Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-27T18:22:32.261Z"}}]}}

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Hay una peque\u00f1a ventana de ejecuci\u00f3n donde la actividad de tx en curso puede provocar que se agregue un skb al idr de seguimiento de estado despu\u00e9s de que ese idr ya se haya limpiado, lo que mantendr\u00e1 el wcid vinculado en la lista de sondeo de estado. Solucione esto agregando skbs de estado solo si el puntero wcid a\u00fan est\u00e1 asignado en dev->wcid, que se limpia antes con mt76_sta_pre_rcu_remove"}], "id": "CVE-2022-49479", "lastModified": "2026-08-04T10:17:49.420", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49479", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-02-27T18:15:50.287677Z", "version": "2.0.3"}}]}, "published": "2025-02-26T07:01:24.153", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ddd426d72aca4054045a9bd3b80a4ce1d398f11f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ef7f9f894cfd0b2e471206409a529af4a26ddd55"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fcfe1b5e162bf473c1d47760962cec8523c00466"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

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{}