CVE-2026-90399

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90399", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.811Z", "datePublished": "2026-09-17T16:09:30.273Z", "dateUpdated": "2026-10-21T12:51:30.270Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:51:30.270Z"}, "descriptions": [{"lang": "en", "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"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "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 \u2192 ath12k_htc_rx_completion_handler \u2192 ath12k_wmi_op_rx \u2192 ath12k_service_ready_ext_event \u2192 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."}]}], "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/ath12k/wmi.c"], "versions": [{"version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2", "lessThan": "79c6f4f7d16eea1bcb8bc5c8fd6ec04a01b0614f", "status": "affected", "versionType": "git"}, {"version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2", "lessThan": "d3355e0fdbbf531ca8b82a6a3feb80a1b7306a8b", "status": "affected", "versionType": "git"}, {"version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2", "lessThan": "b9a5d12cbdeb860306f8d47c92caee0ea6ee0e0a", "status": "affected", "versionType": "git"}, {"version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2", "lessThan": "26f8f87f0a556e7984366c64cebc16d49e15d22f", "status": "affected", "versionType": "git"}, {"version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2", "lessThan": "4c6eb712a91fa079be6f9f1419c96e0ad2227081", "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/ath12k/wmi.c"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.3", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/79c6f4f7d16eea1bcb8bc5c8fd6ec04a01b0614f"}, {"url": "https://git.kernel.org/stable/c/d3355e0fdbbf531ca8b82a6a3feb80a1b7306a8b"}, {"url": "https://git.kernel.org/stable/c/b9a5d12cbdeb860306f8d47c92caee0ea6ee0e0a"}, {"url": "https://git.kernel.org/stable/c/26f8f87f0a556e7984366c64cebc16d49e15d22f"}, {"url": "https://git.kernel.org/stable/c/4c6eb712a91fa079be6f9f1419c96e0ad2227081"}], "title": "wifi: ath12k: fix stride mismatch in mac_phy_caps_parse()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/wireless/ath/ath12k/wmi.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "79c6f4f7d16eea1bcb8bc5c8fd6ec04a01b0614f", "status": "affected", "version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2", "versionType": "git"}, {"lessThan": "d3355e0fdbbf531ca8b82a6a3feb80a1b7306a8b", "status": "affected", "version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2", "versionType": "git"}, {"lessThan": "b9a5d12cbdeb860306f8d47c92caee0ea6ee0e0a", "status": "affected", "version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2", "versionType": "git"}, {"lessThan": "26f8f87f0a556e7984366c64cebc16d49e15d22f", "status": "affected", "version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2", "versionType": "git"}, {"lessThan": "4c6eb712a91fa079be6f9f1419c96e0ad2227081", "status": "affected", "version": "d889913205cf7ebda905b1e62c5867ed4e39f6c2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/wireless/ath/ath12k/wmi.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"lessThan": "6.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "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"}], "id": "CVE-2026-90399", "lastModified": "2026-10-21T13:20:53.897", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-17T17:17:39.643", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/26f8f87f0a556e7984366c64cebc16d49e15d22f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4c6eb712a91fa079be6f9f1419c96e0ad2227081"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/79c6f4f7d16eea1bcb8bc5c8fd6ec04a01b0614f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b9a5d12cbdeb860306f8d47c92caee0ea6ee0e0a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d3355e0fdbbf531ca8b82a6a3feb80a1b7306a8b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d889913205cf7ebda905b1e62c5867ed4e39f6c2,d3355e0fdbbf531ca8b82a6a3feb80a1b7306a8b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d889913205cf7ebda905b1e62c5867ed4e39f6c2,b9a5d12cbdeb860306f8d47c92caee0ea6ee0e0a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d889913205cf7ebda905b1e62c5867ed4e39f6c2,26f8f87f0a556e7984366c64cebc16d49e15d22f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d889913205cf7ebda905b1e62c5867ed4e39f6c2,4c6eb712a91fa079be6f9f1419c96e0ad2227081)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-19T09:00:14.015889+00:00", "updated": "2026-09-19T15:30:06.429357+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-119", "CWE-120"]}