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-2026-90399",
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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": "2026-09-11T19:38:34.811Z",
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"datePublished": "2026-09-17T16:09:30.273Z",
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"dateUpdated": "2026-10-21T12:51:30.270Z"
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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": "2026-10-21T12:51:30.270Z"
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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 stride mismatch in mac_phy_caps_parse()\n\nCurrently, in ath12k_wmi_mac_phy_caps_parse(), kzalloc() sizes the\nmac_phy_caps buffer as tot_phy_id * len, where len is clamped to\nmin(firmware_len, sizeof(struct ath12k_wmi_mac_phy_caps_params)). The\nsubsequent memcpy() destination advances by sizeof(full struct) per slot\nvia C pointer arithmetic, not by the clamped len. When firmware sends\nshort TLVs, the second and later slots are written past the end of the\nallocation.\n\nThe reader in ath12k_pull_mac_phy_cap_svc_ready_ext() also indexes the\nbuffer with full-struct pointer arithmetic, so the allocation must match\nthat stride.\n\nFix by using kzalloc_objs(), which derives the element size from the\npointer type, making allocation size and pointer stride provably\nconsistent regardless of what len the firmware provides.\n\nTested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c7-00108-QCAHMTSWPL_V1.0_V2.0_SILICONZ_UPSTREAM-3"
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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:H/A:H",
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"baseScore": 8.4,
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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 - The malformed bytes are WMI_TAG_MAC_PHY_CAPABILITIES TLVs inside WMI_SERVICE_READY_EXT_EVENTID, DMA'd from the ath12k firmware Copy Engine (ath12k_ce_recv_process_cb → ath12k_htc_rx_completion_handler → ath12k_wmi_op_rx → ath12k_service_ready_ext_event → ath12k_wmi_mac_phy_caps_parse). That is PCIe/AHB host-firmware WMI, not an 802.11 frame.\nAC:L - Firmware sets tot_phy_id via fls(phy_id_map) in ath12k_wmi_hw_mode_caps_parse and the TLV length (no min_len for WMI_TAG_MAC_PHY_CAPABILITIES). Any tot_phy_id>=2 with len < sizeof(struct ath12k_wmi_mac_phy_caps_params) makes memcpy of slot 1+ land past the tot_phy_id*len kzalloc; no race or layout lottery.\nPR:N - The CE/HTC WMI receive path has no capable() or authentication check; ath12k_service_ready_ext_event parses whatever firmware posts. A compromised or malicious WCN7850/QCN9274 firmware needs no Linux account.\nUI:N - ath12k_core_start() blocks in ath12k_wmi_wait_for_service_ready() during probe and crash recovery (ath12k_core_reconfigure_on_crash); the overflow runs when that event arrives, with no victim ioctl, mount, or iface config.\nS:U - The GFP_ATOMIC heap overflow is in the host kernel's mac_phy_caps buffer allocated by ath12k_wmi_mac_phy_caps_parse. Impact stays in that kernel; this is not a KVM/Xen escape or IOMMU DMA-remapping bypass.\nC:H - memcpy writes firmware-chosen payloads at full-struct strides past a short tot_phy_id*len object, and ath12k_wmi_save_all_mac_phy_info()/ath12k_pull_mac_phy_cap_svc_ready_ext() then read that heap with the same stride, giving a high-confidentiality primitive from adjacent objects.\nI:H - Each overflowing slot is an out-of-bounds write of firmware-controlled contents (up to just-under-sizeof(struct ath12k_wmi_mac_phy_caps_params) bytes) into the kernel heap, enabling adjacent-object corruption and control-flow hijack.\nA:H - The same OOB write, and the later full-struct walk of the undersized mac_phy_caps buffer in ath12k_wmi_save_all_mac_phy_info(), can smash heap metadata or adjacent pointers and oops/panic the kernel."
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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": "79c6f4f7d16eea1bcb8bc5c8fd6ec04a01b0614f",
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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": "d3355e0fdbbf531ca8b82a6a3feb80a1b7306a8b",
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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": "b9a5d12cbdeb860306f8d47c92caee0ea6ee0e0a",
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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": "26f8f87f0a556e7984366c64cebc16d49e15d22f",
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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": "4c6eb712a91fa079be6f9f1419c96e0ad2227081",
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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": "6.12.110",
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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": "6.18.52",
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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": "6.12.110"
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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": "6.18.52"
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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/79c6f4f7d16eea1bcb8bc5c8fd6ec04a01b0614f"
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},
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{
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"url": "https://git.kernel.org/stable/c/d3355e0fdbbf531ca8b82a6a3feb80a1b7306a8b"
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},
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{
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"url": "https://git.kernel.org/stable/c/b9a5d12cbdeb860306f8d47c92caee0ea6ee0e0a"
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},
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{
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"url": "https://git.kernel.org/stable/c/26f8f87f0a556e7984366c64cebc16d49e15d22f"
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},
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{
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"url": "https://git.kernel.org/stable/c/4c6eb712a91fa079be6f9f1419c96e0ad2227081"
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}
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],
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"title": "wifi: ath12k: fix stride mismatch in mac_phy_caps_parse()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |