{"id":"CVE-2026-98830","title":"wifi: wfx: validate MIB read length before copying to caller","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wfx: validate MIB read length before copying to caller\n\nwfx_hif_read_mib() copies reply->length bytes from the firmware\nresponse into the caller-provided buffer w…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-787"],"vendor":"Linux","product":"Linux","affected":["Linux >= f95a29d40782f4f0052a692a822de3ba044b19ff < 819d4c1323e2a9b7329021d5367aa01add22b5dc","Linux >= f95a29d40782f4f0052a692a822de3ba044b19ff < 02886c18a340da59df57365f29009e1258bfe333","Linux >= f95a29d40782f4f0052a692a822de3ba044b19ff < 71d140099165de03128c00dd129f1eab21c6a3c4","Linux >= f95a29d40782f4f0052a692a822de3ba044b19ff < 7acb36fd60a3e7b858f12e69a919c3609b281408","Linux >= f95a29d40782f4f0052a692a822de3ba044b19ff < ce67ebe9d8629776ce38e6995ae72fb903c828db","Linux 5.5"],"published":"2026-10-18","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:57:17.057Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98830","references":[{"url":"https://git.kernel.org/stable/c/819d4c1323e2a9b7329021d5367aa01add22b5dc"},{"url":"https://git.kernel.org/stable/c/02886c18a340da59df57365f29009e1258bfe333"},{"url":"https://git.kernel.org/stable/c/71d140099165de03128c00dd129f1eab21c6a3c4"},{"url":"https://git.kernel.org/stable/c/7acb36fd60a3e7b858f12e69a919c3609b281408"},{"url":"https://git.kernel.org/stable/c/ce67ebe9d8629776ce38e6995ae72fb903c828db"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98830.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98830"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555224"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98830"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98830"},{"url":"https://kernelcve.org/list/?q=CVE-2026-98830"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.002,"epssPercentile":0.09734,"ingestedAt":"2026-10-18T16:47:32.470Z","slug":"CVE-2026-98830","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wfx: validate MIB read length before copying to caller\n\nwfx_hif_read_mib() copies reply->length bytes from the firmware\nresponse into the caller-provided buffer without checking that\nreply->length does not exceed val_len. A firmware response with\na length field larger than expected overruns the caller buffer and\nreads past the end of the reply allocation.\n\nReplace the dead -ENOMEM check with an active validation that\nreply->length fits within val_len before the memcpy.\n\n## Affected\n\n- `Linux >= f95a29d40782f4f0052a692a822de3ba044b19ff < 819d4c1323e2a9b7329021d5367aa01add22b5dc`\n- `Linux >= f95a29d40782f4f0052a692a822de3ba044b19ff < 02886c18a340da59df57365f29009e1258bfe333`\n- `Linux >= f95a29d40782f4f0052a692a822de3ba044b19ff < 71d140099165de03128c00dd129f1eab21c6a3c4`\n- `Linux >= f95a29d40782f4f0052a692a822de3ba044b19ff < 7acb36fd60a3e7b858f12e69a919c3609b281408`\n- `Linux >= f95a29d40782f4f0052a692a822de3ba044b19ff < ce67ebe9d8629776ce38e6995ae72fb903c828db`\n- `Linux 5.5`\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 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98830.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":227130,"id":"CVE-2026-98830","ts":1792585147025,"field":"cvss","old":null,"new":"5.5"},{"seq":227129,"id":"CVE-2026-98830","ts":1792585147025,"field":"severity","old":"none","new":"medium"}]}