201 lines
11 KiB
JSON
201 lines
11 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-2026-90408",
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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": "2026-09-11T19:38:34.812Z",
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"datePublished": "2026-09-17T16:09:36.089Z",
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"dateUpdated": "2026-10-21T12:51:31.378Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-21T12:51:31.378Z"
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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\nwifi: ath12k: fix overreads in ath12k_wmi_process_csa_switch_count_event()\n\nThere is no policy entry for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT, so\nthe parse infrastructure does not enforce a minimum length for the event\nstruct. Additionally, the num_vdevs field is taken directly from firmware\nand used as a loop bound over the vdev_ids array without checking that it\nfits within the TLV payload. Either condition can cause an out-of-bounds\nread.\n\nAdd a TLV policy entry for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT so\nthe parse infrastructure enforces a minimum length for the fixed-size event\nstruct. Add a helper ath12k_wmi_tlv_data_len() to recover the payload\nlength of a parsed TLV from the header preceding its data pointer. Use it\nin ath12k_wmi_process_csa_switch_count_event() to bound num_vdevs before\nthe loop.\n\nCompile tested only."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
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"baseScore": 7.7,
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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:L - Firmware supplies the malformed bytes in WMI_PDEV_CSA_SWITCH_COUNT_STATUS_EVENTID (num_vdevs and the WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT TLV length) on CE2 → ath12k_ce_recv_process_cb → ath12k_htc_rx_completion_handler → ath12k_wmi_op_rx; 802.11 CSA IEs do not carry those fields, so this is the host-firmware HTC path, not an over-the-air frame parse.\nAC:L - Pre-fix ath12k_wmi_tlv_policies had no min_len for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT, and ath12k_wmi_process_csa_switch_count_event() used firmware le32 num_vdevs as the vdev_ids[] loop bound with no TLV-length check, so a short event TLV or oversized num_vdevs overreads on every such event with no race.\nPR:N - ath12k_wmi_op_rx() dispatches WMI_PDEV_CSA_SWITCH_COUNT_STATUS_EVENTID from the WMI HTC endpoint (ath12k_connect_pdev_htc_service) with no host uid, capability, or authentication check; the Wi-Fi firmware is the sole source of the event.\nUI:N - ath12k_wmi_process_csa_switch_count_event() reads vdev_ids[i] in the num_vdevs loop before the conf->csa_active continue, so a crafted CSA-count WMI event overreads even when the victim never started a channel switch; no mount or other user action is required.\nS:U - The vdev_ids[] overread and any oops remain inside the host kernel ath12k/mac80211 authority; the bug does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Firmware-chosen num_vdevs is an unbounded u32 loop over the WMI_TAG_ARRAY_UINT32 vdev_ids payload (policy min_len 0), so the handler can read far past the CE WMI skb (~2KB); unknown vdev_ids[i] values are also printed by ath12k_warn(), which is an unbounded kernel overread, not a few bytes.\nI:N - The loop only loads vdev_ids[i] and looks them up with ath12k_mac_get_arvif_by_vdev_id(); it does not write out of bounds, and ieee80211_csa_finish() runs only for an already-valid in-CSA arvif rather than as a write primitive from the overread.\nA:H - A huge num_vdevs walks vdev_ids[] off the WMI skb while holding rcu_read_lock(), which can oops/panic on unmapped or KASAN-redzoned heap past the CE buffer and can stall RCU for a 32-bit iteration count, a full kernel availability loss."
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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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{
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"product": "Linux",
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"vendor": "Linux",
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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/ath12k/wmi.c"
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],
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"versions": [
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{
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"version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2",
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"lessThan": "d4aec20f3a84634171c139ab2e02bb2e5a5c756b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2",
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"lessThan": "24f7cdabea9f7ab95dbd6d8bc9ac6ec48d96a7e5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2",
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"lessThan": "23bed4ef132c55c9016f0c6122c8b8ba2efa2353",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2",
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"lessThan": "bf97c9d5123859a07848462539153176db029f3a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2",
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"lessThan": "878654eb78c6aa0ff585baf1376567c775ca28ec",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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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/ath12k/wmi.c"
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],
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"versions": [
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{
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"version": "6.3",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.3",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.114",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.57",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.6",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.3",
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"versionEndExcluding": "6.6.160"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.3",
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"versionEndExcluding": "6.12.114"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.3",
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"versionEndExcluding": "6.18.57"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.3",
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"versionEndExcluding": "7.2.6"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.3",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/d4aec20f3a84634171c139ab2e02bb2e5a5c756b"
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},
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{
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"url": "https://git.kernel.org/stable/c/24f7cdabea9f7ab95dbd6d8bc9ac6ec48d96a7e5"
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},
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{
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"url": "https://git.kernel.org/stable/c/23bed4ef132c55c9016f0c6122c8b8ba2efa2353"
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},
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{
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"url": "https://git.kernel.org/stable/c/bf97c9d5123859a07848462539153176db029f3a"
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},
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{
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"url": "https://git.kernel.org/stable/c/878654eb78c6aa0ff585baf1376567c775ca28ec"
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}
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],
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"title": "wifi: ath12k: fix overreads in ath12k_wmi_process_csa_switch_count_event()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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} |