{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47017", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-27T18:42:55.954Z", "datePublished": "2024-02-28T08:13:32.739Z", "dateUpdated": "2026-08-05T08:45:36.642Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:45:36.642Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nath10k: Fix a use after free in ath10k_htc_send_bundle\n\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.\n\nAs skb_len = bundle_skb->len, my patch replaces bundle_skb->len to\nskb_len after the bundle_skb was freed." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The UAF is in the ath10k SDIO/HL WiFi HTT TX bundle path (ath10k_htc_send_hl → bundle_tx_work → ath10k_htc_send_bundle), reached when the host transmits over QCA SDIO WiFi; an in-range attacker on a hotspot/AP or busy STA link can induce that TX, so reachability is Adjacent 802.11, not routable Network or Local-only.\nAC:L - The free occurs on the documented send-failure path (credit consume returning -EAGAIN after the non-consuming build-time check, or hif_tx_sg failure), which an adjacent attacker can drive with sustained TX load; no race or layout outside attacker influence is required once bundling is active.\nPR:N - Triggering outbound WiFi TX and credit pressure needs no account or capability on the victim OS—association/traffic from an adjacent peer is enough, with no CAP_NET_ADMIN or local login gate on this driver path.\nUI:N - Once the ath10k SDIO interface is up, the attacker can unilaterally generate traffic that queues bundled HTT TX; 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" } } ] } }