{"id":"CVE-2026-23444","revision":"f42143d927a84b409081e9909701c966","records":[{"revision":"f42143d927a84b409081e9909701c966","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-23444","aliases":[],"title":"wifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure\n\nieee80211_tx_prepare_skb() has three error paths, but only two of them\nfree the skb. The first error path (ieee80211_tx_prepare() returning\nTX_DROP) does not free it, while invoke_tx_handlers() failure and the\nfragmentation check both do.\n\nAdd kfree_skb() to the first error path so all three are consistent,\nand remove the now-redundant frees in callers (ath9k, mt76,\nmac80211_hwsim) to avoid double-free.\n\nDocument the skb ownership guarantee in the function's kdoc.","state":0,"publishedAt":"2026-04-03T15:15:28.464+00:00","modifiedAt":"2026-10-19T18:35:43.925+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                        \"drivers/net/wireless/ath/ath9k/channel.c\",\n                        \"drivers/net/wireless/mediatek/mt76/scan.c\",\n                        \"drivers/net/wireless/virtual/mac80211_hwsim.c\",\n                        \"include/net/mac80211.h\",\n                        \"net/mac80211/tx.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"06be6b149f7e406bcf16098567f5a6c9f042bced\",\n                            \"lessThan\": \"905ef207d5ed99ca64adfe39fba9ac46e434327a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"06be6b149f7e406bcf16098567f5a6c9f042bced\",\n                            \"lessThan\": \"5ef8ca1c164786da24169af155c1ca1ff1353cf8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"06be6b149f7e406bcf16098567f5a6c9f042bced\",\n                            \"lessThan\": \"9a779d1f480e83720b5384adf165604e7ee226bd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"06be6b149f7e406bcf16098567f5a6c9f042bced\",\n                            \"lessThan\": \"f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"06be6b149f7e406bcf16098567f5a6c9f042bced\",\n                            \"lessThan\": \"3b4d27acafaeab478fd24f79ad6e593a892828b9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"06be6b149f7e406bcf16098567f5a6c9f042bced\",\n                            \"lessThan\": \"06e769dddcbeb3baf2ce346273b53dd61fdbecf4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"06be6b149f7e406bcf16098567f5a6c9f042bced\",\n                            \"lessThan\": \"50f1b690b4868923fbd242298def2fb88662f108\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"06be6b149f7e406bcf16098567f5a6c9f042bced\",\n                            \"lessThan\": \"d5ad6ab61cbd89afdb60881f6274f74328af3ee9\",\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                        \"drivers/net/wireless/ath/ath9k/channel.c\",\n                        \"drivers/net/wireless/mediatek/mt76/scan.c\",\n                        \"drivers/net/wireless/virtual/mac80211_hwsim.c\",\n                        \"include/net/mac80211.h\",\n                        \"net/mac80211/tx.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.13\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.13\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.258\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.209\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.175\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.136\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.84\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.20\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.10\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/905ef207d5ed99ca64adfe39fba9ac46e434327a","https://git.kernel.org/stable/c/5ef8ca1c164786da24169af155c1ca1ff1353cf8","https://git.kernel.org/stable/c/9a779d1f480e83720b5384adf165604e7ee226bd","https://git.kernel.org/stable/c/f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4","https://git.kernel.org/stable/c/3b4d27acafaeab478fd24f79ad6e593a892828b9","https://git.kernel.org/stable/c/06e769dddcbeb3baf2ce346273b53dd61fdbecf4","https://git.kernel.org/stable/c/50f1b690b4868923fbd242298def2fb88662f108","https://git.kernel.org/stable/c/d5ad6ab61cbd89afdb60881f6274f74328af3ee9"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23444","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-23444","identifiers":["CVE-2026-23444"]},"retained":false,"historicalAffected":[]}],"coverage":[]}