{"id":"CVE-2026-98422","revision":"a37adea3b53143e39dc987e694d10502","records":[{"revision":"a37adea3b53143e39dc987e694d10502","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98422","aliases":[],"title":"wifi: mac80211: reset the AP_VLAN tailroom counter on ifdown","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: reset the AP_VLAN tailroom counter on ifdown\n\nOn ifup, AP_VLAN interfaces get crypto_tx_tailroom_needed_cnt from\nthe AP interface, but it's never decremented again unless the AP is\nalso brought down. Thus, bringing the same AP_VLAN up again will\nincrement the counter again and eventually hit the sanity check:\n\n  WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt !=\n               master->crypto_tx_tailroom_needed_cnt);\n\nReset it on ifdown to avoid that.","state":0,"publishedAt":"2026-10-14T13:27:50.789+00:00","modifiedAt":"2026-10-19T09:19:15.873+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/mac80211/iface.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"f9dca80b98caac8b4bfb43a2edf1e9f877ccf322\",\n                            \"lessThan\": \"b0b32d3f163d24ea7134380666193bf398e9dc0b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f9dca80b98caac8b4bfb43a2edf1e9f877ccf322\",\n                            \"lessThan\": \"f6b34a7d64324faf28eedc0f8678b0f832f1cc36\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f9dca80b98caac8b4bfb43a2edf1e9f877ccf322\",\n                            \"lessThan\": \"304a874670a0b6ab5589a7f60b4af0251797b121\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f9dca80b98caac8b4bfb43a2edf1e9f877ccf322\",\n                            \"lessThan\": \"7775759e3cb35ef5a571b2d877c2a9b70a5d5f08\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f9dca80b98caac8b4bfb43a2edf1e9f877ccf322\",\n                            \"lessThan\": \"3d76b45e8432c0d75fcb9e90d92eaa3176898adf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f9dca80b98caac8b4bfb43a2edf1e9f877ccf322\",\n                            \"lessThan\": \"4b54d01b48445b66c9e576de92b90a3a3ae7b34a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f9dca80b98caac8b4bfb43a2edf1e9f877ccf322\",\n                            \"lessThan\": \"875835377d8d62c849b4eb03a7abfafa71d7668f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f9dca80b98caac8b4bfb43a2edf1e9f877ccf322\",\n                            \"lessThan\": \"4504f3960dc4501c73be9f99eabda2e26e9db41e\",\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/mac80211/iface.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.1\",\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\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.54\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.8\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/b0b32d3f163d24ea7134380666193bf398e9dc0b","https://git.kernel.org/stable/c/f6b34a7d64324faf28eedc0f8678b0f832f1cc36","https://git.kernel.org/stable/c/304a874670a0b6ab5589a7f60b4af0251797b121","https://git.kernel.org/stable/c/7775759e3cb35ef5a571b2d877c2a9b70a5d5f08","https://git.kernel.org/stable/c/3d76b45e8432c0d75fcb9e90d92eaa3176898adf","https://git.kernel.org/stable/c/4b54d01b48445b66c9e576de92b90a3a3ae7b34a","https://git.kernel.org/stable/c/875835377d8d62c849b4eb03a7abfafa71d7668f","https://git.kernel.org/stable/c/4504f3960dc4501c73be9f99eabda2e26e9db41e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98422","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98422","identifiers":["CVE-2026-98422"]},"retained":false,"historicalAffected":[]}],"coverage":[]}