248 lines
12 KiB
JSON
248 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2021-47017",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-02-27T18:42:55.954Z",
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"datePublished": "2024-02-28T08:13:32.739Z",
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"dateUpdated": "2026-08-05T08:45:36.642Z"
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},
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"containers": {
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"cna": {
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:45:36.642Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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{
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"baseScore": 8.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/wireless/ath/ath10k/htc.c"
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],
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"versions": [
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"version": "5.8",
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"version": "0",
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"version": "5.10.37",
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"lessThanOrEqual": "5.10.*",
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{
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"version": "5.11.21",
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"lessThanOrEqual": "5.11.*",
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"status": "unaffected",
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},
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{
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"version": "5.12.4",
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"lessThanOrEqual": "5.12.*",
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"status": "unaffected",
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},
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{
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"version": "5.13",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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