{"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"}}]}}