222 lines
13 KiB
JSON
222 lines
13 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-2026-90407",
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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": "2026-09-17T16:09:35.420Z",
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"dateUpdated": "2026-10-30T12:35:30.286Z"
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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": "2026-10-30T12:35:30.286Z"
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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: ath11k: fix overreads in ath11k_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 ath11k_wmi_tlv_data_len() to recover the payload\nlength of a parsed TLV from the header preceding its data pointer. Use it\nin ath11k_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 - The malformed bytes are firmware WMI_PDEV_CSA_SWITCH_COUNT_STATUS_EVENTID TLVs on CE2 (ath11k_ce_recv_process_cb → ath11k_htc_rx_completion_handler → ath11k_wmi_tlv_op_rx). num_vdevs and the event/ARRAY_UINT32 lengths are built by firmware, not taken from an 802.11 CSA IE, so this is a host-firmware HTC path, not WiFi frame injection.\nAC:L - wmi_tlv_policies had no min_len for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT, and ath11k_wmi_process_csa_switch_count_event() used ev->num_vdevs as the vdev_ids[] bound with no compare to the ARRAY_UINT32 TLV length. Firmware setting current_switch_count=0 and an oversized num_vdevs makes the overread deterministic, with no race.\nPR:N - ath11k_wmi_tlv_op_rx() dispatches WMI_PDEV_CSA_SWITCH_COUNT_STATUS_EVENTID from the WMI HTC rx callback with no host uid, capability, or authentication check; the device firmware is the sole source of the event struct and vdev_ids array.\nUI:N - Firmware can send WMI_PDEV_CSA_SWITCH_COUNT_STATUS_EVENTID unsolicited on the WMI RX path; the overread of ev->current_switch_count/num_vdevs and vdev_ids[i] runs before the csa_active check and does not require the victim to start a channel switch, mount media, or open a file.\nS:U - The out-of-bounds loads of ev fields and vdev_ids[] stay inside the host kernel ath11k WMI parser and the CE RX skb heap; they do not cross a VM, IOMMU, or other separate security authority.\nC:H - ev->num_vdevs is a firmware u32 used as an unbounded index over vdev_ids[], so a count past the ARRAY_UINT32 TLV reads kernel heap beyond the WMI skb; unknown ids are also printed by ath11k_warn(\"Recvd csa status for unknown vdev %d\"). That is not a few-byte leak.\nI:N - The loop only reads vdev_ids[i] into ath11k_mac_get_arvif_by_vdev_id(); it never writes through the overread pointer. ieee80211_csa_finish() runs only if a looked-up vif already has csa_active, which is not an OOB write or hijack primitive from the overread.\nA:H - A firmware-chosen num_vdevs that walks vdev_ids[] past the CE RX skb can load from unmapped heap and oops/panic in ath11k_wmi_process_csa_switch_count_event(), which is 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/ath11k/wmi.c"
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],
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"versions": [
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{
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"version": "d5c65159f2895379e11ca13f62feabe93278985d",
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"lessThan": "57e77a6d900e5bc6e73ccd3ee1ba3bce834c9dde",
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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": "d5c65159f2895379e11ca13f62feabe93278985d",
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"lessThan": "f760b7d7e43584d2fa9bffcec1a04e502609f827",
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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": "d5c65159f2895379e11ca13f62feabe93278985d",
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"lessThan": "d6625dc5f1fe42cd81b8c57a1f5317afb9b410ce",
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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": "d5c65159f2895379e11ca13f62feabe93278985d",
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"lessThan": "0364926fb4bfb5b798e5fe2785b3023b4f767327",
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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": "d5c65159f2895379e11ca13f62feabe93278985d",
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"lessThan": "5de2b8c53714ad58f2fda118cd29ebbe31b38665",
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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": "d5c65159f2895379e11ca13f62feabe93278985d",
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"lessThan": "208d7fdb85976a737a715b81d54efaff6703880c",
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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/ath11k/wmi.c"
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],
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"versions": [
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{
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"version": "5.6",
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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": "5.6",
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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": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.157",
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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": "5.6",
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"versionEndExcluding": "6.1.191"
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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": "5.6",
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"versionEndExcluding": "6.6.157"
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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": "5.6",
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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": "5.6",
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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": "5.6",
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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": "5.6",
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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/57e77a6d900e5bc6e73ccd3ee1ba3bce834c9dde"
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},
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{
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"url": "https://git.kernel.org/stable/c/f760b7d7e43584d2fa9bffcec1a04e502609f827"
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},
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{
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"url": "https://git.kernel.org/stable/c/d6625dc5f1fe42cd81b8c57a1f5317afb9b410ce"
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},
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{
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"url": "https://git.kernel.org/stable/c/0364926fb4bfb5b798e5fe2785b3023b4f767327"
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},
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{
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"url": "https://git.kernel.org/stable/c/5de2b8c53714ad58f2fda118cd29ebbe31b38665"
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},
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{
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"url": "https://git.kernel.org/stable/c/208d7fdb85976a737a715b81d54efaff6703880c"
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}
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],
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"title": "wifi: ath11k: fix overreads in ath11k_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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}
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}
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}
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} |