CVE-2026-80933

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80933", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.802Z", "datePublished": "2026-09-11T19:42:07.754Z", "dateUpdated": "2026-10-19T08:45:17.026Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:45:17.026Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: validate default EEPROM firmware size\n\nThe default EEPROM firmware is parsed and copied as a full EEPROM\nwithout checking its length. A truncated file can make the driver\nread beyond the firmware buffer during variant validation or the\nfallback copy.\n\nReject files shorter than MT7996_EEPROM_SIZE before parsing or\ncopying the firmware."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The truncated default EEPROM image is consumed only via request_firmware() on the local PCI probe path (mt7996_pci_probe \u2192 mt7996_register_device \u2192 mt7996_init_hardware \u2192 mt7996_eeprom_init \u2192 mt7996_eeprom_check_or_use_default); WiFi frames, network protocols, and USB traffic never reach this parser.\nAC:L - A non-empty file shorter than MT7996_EEPROM_SIZE (7680 bytes) deterministically over-reads: variant validation indexes fw->data at MT_EE_WIFI_CONF, and a crafted WIFI_CONF that fails the match (or the common use_default fallback) takes memcpy(eeprom, fw->data, 7680) with no race or layout luck.\nPR:L - The parse path has no capability check, and default EEPROM blobs live under /lib/firmware/mediatek/mt7996/ and vendor firmware partitions on OpenWrt/AP/Android Filogic deployments that are often writable by non-root system or OTA accounts, so a low-privileged local user can position the truncated image.\nUI:N - Once the truncated EEPROM firmware file is in place, request_firmware() and the subsequent parse/copy run automatically during driver probe at boot or module bind; no victim action such as opening a device node or mounting a filesystem is required.\nS:U - The out-of-bounds read and the EEPROM/MCU state it poisons remain inside the host kernel and the local MT7996 device; this is not a VM escape, IOMMU bypass, or other cross-authority breakout.\nC:H - memcpy(..., 7680) and mt7996_eeprom_parse_stream() read far past the firmware buffer into eeprom.data, which is then used as the interface MAC, exposed via the 0400 debugfs eeprom blob, and uploaded to the MCU\u2014an unbounded kernel-memory disclosure, not a few-byte leak.\nI:H - The fallback memcpy writes the over-read kernel memory into the live 7680-byte EEPROM object that then drives MAC/capability configuration and mt7996_mcu_set_eeprom() programming of the WiFi 7 MCU, so attacker-influenced data corrupts kernel and device control state; memory-corruption copies are rated High.\nA:H - Firmware buffers are vmalloc/vmap allocations with guard pages, so a 7680-byte over-read from a short file reliably faults into an unmapped page and oopses or panics the kernel during probe of MT7996/MT7992/MT7990 hardware."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c"], "versions": [{"version": "98686cd21624c75a043e96812beadddf4f6f48e5", "lessThan": "b4bf67cc0871b13103c404b38e332b9d4403a0da", "status": "affected", "versionType": "git"}, {"version": "98686cd21624c75a043e96812beadddf4f6f48e5", "lessThan": "127a291f4c8069a4e71906938402cacfe24ee8cd", "status": "affected", "versionType": "git"}, {"version": "98686cd21624c75a043e96812beadddf4f6f48e5", "lessThan": "03b81f015dbb29807ce1ec6d45537d658abdac69", "status": "affected", "versionType": "git"}, {"version": "98686cd21624c75a043e96812beadddf4f6f48e5", "lessThan": "7074ec3769820302f1ccf8794a40a6582153b820", "status": "affected", "versionType": "git"}, {"version": "98686cd21624c75a043e96812beadddf4f6f48e5", "lessThan": "653c6e289b13cc6942f3e8f8e3c568e70fa42d1f", "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/mediatek/mt76/mt7996/eeprom.c"], "versions": [{"version": "6.2", "status": "affected"}, {"version": "0", "lessThan": "6.2", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "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": "6.2", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b4bf67cc0871b13103c404b38e332b9d4403a0da"}, {"url": "https://git.kernel.org/stable/c/127a291f4c8069a4e71906938402cacfe24ee8cd"}, {"url": "https://git.kernel.org/stable/c/03b81f015dbb29807ce1ec6d45537d658abdac69"}, {"url": "https://git.kernel.org/stable/c/7074ec3769820302f1ccf8794a40a6582153b820"}, {"url": "https://git.kernel.org/stable/c/653c6e289b13cc6942f3e8f8e3c568e70fa42d1f"}], "title": "wifi: mt76: mt7996: validate default EEPROM firmware size", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b4bf67cc0871b13103c404b38e332b9d4403a0da", "status": "affected", "version": "98686cd21624c75a043e96812beadddf4f6f48e5", "versionType": "git"}, {"lessThan": "127a291f4c8069a4e71906938402cacfe24ee8cd", "status": "affected", "version": "98686cd21624c75a043e96812beadddf4f6f48e5", "versionType": "git"}, {"lessThan": "03b81f015dbb29807ce1ec6d45537d658abdac69", "status": "affected", "version": "98686cd21624c75a043e96812beadddf4f6f48e5", "versionType": "git"}, {"lessThan": "7074ec3769820302f1ccf8794a40a6582153b820", "status": "affected", "version": "98686cd21624c75a043e96812beadddf4f6f48e5", "versionType": "git"}, {"lessThan": "653c6e289b13cc6942f3e8f8e3c568e70fa42d1f", "status": "affected", "version": "98686cd21624c75a043e96812beadddf4f6f48e5", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.2"}, {"lessThan": "6.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "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: mt76: mt7996: validate default EEPROM firmware size\n\nThe default EEPROM firmware is parsed and copied as a full EEPROM\nwithout checking its length. A truncated file can make the driver\nread beyond the firmware buffer during variant validation or the\nfallback copy.\n\nReject files shorter than MT7996_EEPROM_SIZE before parsing or\ncopying the firmware."}], "id": "CVE-2026-80933", "lastModified": "2026-10-19T09:17:24.453", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:18:57.160", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/03b81f015dbb29807ce1ec6d45537d658abdac69"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/127a291f4c8069a4e71906938402cacfe24ee8cd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/653c6e289b13cc6942f3e8f8e3c568e70fa42d1f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7074ec3769820302f1ccf8794a40a6582153b820"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b4bf67cc0871b13103c404b38e332b9d4403a0da"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel mt76: mt7996 Wi-Fi driver: Information disclosure via EEPROM firmware size validation flaw", "id": "2532333", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532333"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.7", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in the Linux kernel's mt76: mt7996 Wi-Fi driver. This vulnerability occurs because the driver does not properly validate the size of the default EEPROM (Electrically Erasable Programmable Read-Only Memory) firmware. A specially crafted, truncated EEPROM firmware file can cause the driver to read beyond its allocated buffer, potentially leading to information disclosure or a denial of service."], "name": "CVE-2026-80933", "public_date": "2026-09-11T19:42:07Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80933\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80933\nhttps://git.kernel.org/stable/c/03b81f015dbb29807ce1ec6d45537d658abdac69\nhttps://git.kernel.org/stable/c/653c6e289b13cc6942f3e8f8e3c568e70fa42d1f\nhttps://git.kernel.org/stable/c/7074ec3769820302f1ccf8794a40a6582153b820"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[98686cd21624c75a043e96812beadddf4f6f48e5,03b81f015dbb29807ce1ec6d45537d658abdac69)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[98686cd21624c75a043e96812beadddf4f6f48e5,7074ec3769820302f1ccf8794a40a6582153b820)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[98686cd21624c75a043e96812beadddf4f6f48e5,653c6e289b13cc6942f3e8f8e3c568e70fa42d1f)"}}], "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": "6.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"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": "2026-09-12T01:45:03.538952+00:00", "updated": "2026-09-21T03:15:09.541494+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}