{"id":"CVE-2026-93784","revision":"7e6010cd9a8b43e792567319fa471127","records":[{"revision":"7e6010cd9a8b43e792567319fa471127","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93784","aliases":[],"title":"wifi: cfg80211: validate IEs in cfg80211_wext_siwgenie()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: validate IEs in cfg80211_wext_siwgenie()\n\nThe KASAN allocation trace shows that a malformed IE buffer is\nstored via SIOCSIWGENIE (cfg80211_wext_siwgenie()) without any\nvalidation. The crash trace shows that a subsequent SIOCSIWESSID\ntriggers a connection attempt which calls cfg80211_sme_get_conn_ies()\nto process the stored IE buffer, causing:\n\n - An out-of-bounds read in skip_ie() which reads ies[pos+1]\n   (the length byte) past the end of the 1-byte buffer.\n\n - An integer underflow in the memcpy size argument when offs\n   returned by ieee80211_ie_split() exceeds ies_len, causing\n   unsigned subtraction to wrap to SIZE_MAX and triggering a\n   fortify panic.\n\nFix this by validating the IE buffer in cfg80211_wext_siwgenie()\nbefore storing it.\n\n[drop unnecessary ie_len check, update commit message]","state":0,"publishedAt":"2026-09-24T16:02:18.067+00:00","modifiedAt":"2026-10-03T10:57:19.164+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/wireless/wext-sme.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"f21293549f60f88c74fcb9944737f11048896dc4\",\n                            \"lessThan\": \"269498ce6c1e2132b072aa0c8660404926008f03\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f21293549f60f88c74fcb9944737f11048896dc4\",\n                            \"lessThan\": \"685082f4be77f4657b498ebbe9f942ef65c492cf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f21293549f60f88c74fcb9944737f11048896dc4\",\n                            \"lessThan\": \"8b921a8993469a3482e0c67b5ce5cb6ce93f5f61\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f21293549f60f88c74fcb9944737f11048896dc4\",\n                            \"lessThan\": \"d01f1600e8b075aa17adb751ac9881bb6ee40dcc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f21293549f60f88c74fcb9944737f11048896dc4\",\n                            \"lessThan\": \"c970879e03b23a27df42caf7ba506485a165fb96\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f21293549f60f88c74fcb9944737f11048896dc4\",\n                            \"lessThan\": \"01cc395cecfaa73134d39fb9a401d9605d8bb2c5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f21293549f60f88c74fcb9944737f11048896dc4\",\n                            \"lessThan\": \"a2f5286ca4f304d3fd469f01b96b518608912a5c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/wireless/wext-sme.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.32\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.32\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.271\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.111\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/269498ce6c1e2132b072aa0c8660404926008f03","https://git.kernel.org/stable/c/685082f4be77f4657b498ebbe9f942ef65c492cf","https://git.kernel.org/stable/c/8b921a8993469a3482e0c67b5ce5cb6ce93f5f61","https://git.kernel.org/stable/c/d01f1600e8b075aa17adb751ac9881bb6ee40dcc","https://git.kernel.org/stable/c/c970879e03b23a27df42caf7ba506485a165fb96","https://git.kernel.org/stable/c/01cc395cecfaa73134d39fb9a401d9605d8bb2c5","https://git.kernel.org/stable/c/a2f5286ca4f304d3fd469f01b96b518608912a5c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93784","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93784","identifiers":["CVE-2026-93784"]},"retained":false,"historicalAffected":[]}],"coverage":[]}