{"id":"CVE-2026-90399","title":"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, w…","summary":"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, w…","severity":"high","cvss":8.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= d889913205cf7ebda905b1e62c5867ed4e39f6c2 < d3355e0fdbbf531ca8b82a6a3feb80a1b7306a8b","Linux >= d889913205cf7ebda905b1e62c5867ed4e39f6c2 < b9a5d12cbdeb860306f8d47c92caee0ea6ee0e0a","Linux >= d889913205cf7ebda905b1e62c5867ed4e39f6c2 < 26f8f87f0a556e7984366c64cebc16d49e15d22f","Linux >= d889913205cf7ebda905b1e62c5867ed4e39f6c2 < 4c6eb712a91fa079be6f9f1419c96e0ad2227081","Linux 6.3"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:17:57.220","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90399","references":[{"url":"https://git.kernel.org/stable/c/26f8f87f0a556e7984366c64cebc16d49e15d22f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4c6eb712a91fa079be6f9f1419c96e0ad2227081","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b9a5d12cbdeb860306f8d47c92caee0ea6ee0e0a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d3355e0fdbbf531ca8b82a6a3feb80a1b7306a8b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90399.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-90399"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536769"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90399"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90399"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90399.mbox"},{"url":"https://git.kernel.org/stable/c/79c6f4f7d16eea1bcb8bc5c8fd6ec04a01b0614f"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00186,"epssPercentile":0.08081,"ingestedAt":"2026-09-17T16:21:47.801Z","cwe":["CWE-787"],"scores":{"nvd":8.4,"vendor":7,"cna":8.4},"slug":"CVE-2026-90399","body":"## Overview\n\nIn 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\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90399.json)","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":46.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207299,"id":"CVE-2026-90399","ts":1789757340569,"field":"cvss","old":null,"new":"8.4"},{"seq":207298,"id":"CVE-2026-90399","ts":1789757340569,"field":"severity","old":"none","new":"high"}]}