CVE-2021-47017

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no extra victim action such as mounting a device or clicking is required.\nS:U - The dangling sk_buff access corrupts/discloses host-kernel heap state within the same kernel authority and does not cross a VM, IOMMU, or other distinct trust boundary.\nC:H - This is a use-after-free of a kmalloc-backed sk_buff (bundle_skb) after dev_kfree_skb_any; per kernel UAF guidance, reclaim of the freed object enables arbitrary kernel memory disclosure.\nI:H - The same sk_buff UAF is exploitable heap corruption that enables heap spray, arbitrary write, and control-flow hijack primitives beyond a pure crash.\nA:H - Post-free dereference of bundle_skb can oops/panic if the object/page is reclaimed or unmapped, so availability impact is High even without a full exploit."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/ath/ath10k/htc.c"], "versions": [{"version": "c8334512f3dd1b94844baca629f9bedca4271593", "lessThan": "8bb054fb336f4250002fff4e0b075221c05c3c65", "status": "affected", "versionType": "git"}, {"version": "c8334512f3dd1b94844baca629f9bedca4271593", "lessThan": "3b1ac40c6012140828caa79e592a438a18ebf71b", "status": "affected", "versionType": "git"}, {"version": "c8334512f3dd1b94844baca629f9bedca4271593", "lessThan": "5e413c0831ff4700d1739db3fa3ae9f859744676", "status": "affected", "versionType": "git"}, {"version": "c8334512f3dd1b94844baca629f9bedca4271593", "lessThan": "8392df5d7e0b6a7d21440da1fc259f9938f4dec3", "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/ath/ath10k/htc.c"], "versions": [{"version": "5.8", "status": "affected"}, {"version": "0", "lessThan": "5.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.37", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.11.21", "lessThanOrEqual": "5.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.12.4", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.13", "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": "5.8", "versionEndExcluding": "5.10.37"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.11.21"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.12.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8bb054fb336f4250002fff4e0b075221c05c3c65"}, {"url": "https://git.kernel.org/stable/c/3b1ac40c6012140828caa79e592a438a18ebf71b"}, {"url": "https://git.kernel.org/stable/c/5e413c0831ff4700d1739db3fa3ae9f859744676"}, {"url": "https://git.kernel.org/stable/c/8392df5d7e0b6a7d21440da1fc259f9938f4dec3"}], "title": "ath10k: Fix a use after free in ath10k_htc_send_bundle", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.550Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/8bb054fb336f4250002fff4e0b075221c05c3c65", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/3b1ac40c6012140828caa79e592a438a18ebf71b", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/5e413c0831ff4700d1739db3fa3ae9f859744676", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/8392df5d7e0b6a7d21440da1fc259f9938f4dec3", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47017", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:58:09.590731Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:30.771Z"}}]}}

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But the bundle_skb is used later\nby bundle_skb->len.\n\nAs skb_len = bundle_skb->len, my patch replaces bundle_skb->len to\nskb_len after the bundle_skb was freed."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ath10k: corrige un use after free en ath10k_htc_send_bundle En ath10k_htc_send_bundle, el paquete_skb podr\u00eda ser liberado por dev_kfree_skb_any(bundle_skb). Pero el paquete_skb lo utiliza m\u00e1s tarde el paquete_skb->len. Como skb_len = bundle_skb->len, mi parche reemplaza bundle_skb->len por skb_len despu\u00e9s de que se liber\u00f3 el paquete_skb."}], "id": "CVE-2021-47017", "lastModified": "2026-08-04T10:16:41.900", "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": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-47017", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T15:58:09.590731Z", "version": "2.0.3"}}]}, "published": "2024-02-28T09:15:38.960", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3b1ac40c6012140828caa79e592a438a18ebf71b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5e413c0831ff4700d1739db3fa3ae9f859744676"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8392df5d7e0b6a7d21440da1fc259f9938f4dec3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8bb054fb336f4250002fff4e0b075221c05c3c65"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3b1ac40c6012140828caa79e592a438a18ebf71b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5e413c0831ff4700d1739db3fa3ae9f859744676"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8392df5d7e0b6a7d21440da1fc259f9938f4dec3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8bb054fb336f4250002fff4e0b075221c05c3c65"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: use after free in ath10k_htc_send_bundle", "id": "2266588", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2266588"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nath10k: Fix a use after free in ath10k_htc_send_bundle\nIn ath10k_htc_send_bundle, the bundle_skb could be freed by\ndev_kfree_skb_any(bundle_skb). But the bundle_skb is used later\nby bundle_skb->len.\nAs skb_len = bundle_skb->len, my patch replaces bundle_skb->len to\nskb_len after the bundle_skb was freed.", "A use-after-free flaw was found in ath10k_htc_send_bundle in ath10k in the Linux Kernel."], "name": "CVE-2021-47017", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Under investigation", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Under investigation", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-02-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47017\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47017\nhttps://git.kernel.org/stable/c/3b1ac40c6012140828caa79e592a438a18ebf71b\nhttps://git.kernel.org/stable/c/5e413c0831ff4700d1739db3fa3ae9f859744676\nhttps://git.kernel.org/stable/c/8392df5d7e0b6a7d21440da1fc259f9938f4dec3\nhttps://git.kernel.org/stable/c/8bb054fb336f4250002fff4e0b075221c05c3c65"], "threat_severity": "Moderate"}

{}