{"api_version":"1","generated_at":"2026-04-23T09:39:59+00:00","cve":"CVE-2026-23444","urls":{"html":"https://cve.report/CVE-2026-23444","api":"https://cve.report/api/cve/CVE-2026-23444.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-23444","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23444"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-04-03 16:16:28","updated_at":"2026-04-07 13:21:09"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/06e769dddcbeb3baf2ce346273b53dd61fdbecf4","name":"https://git.kernel.org/stable/c/06e769dddcbeb3baf2ce346273b53dd61fdbecf4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/50f1b690b4868923fbd242298def2fb88662f108","name":"https://git.kernel.org/stable/c/50f1b690b4868923fbd242298def2fb88662f108","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d5ad6ab61cbd89afdb60881f6274f74328af3ee9","name":"https://git.kernel.org/stable/c/d5ad6ab61cbd89afdb60881f6274f74328af3ee9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-23444","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23444","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 06be6b149f7e406bcf16098567f5a6c9f042bced 06e769dddcbeb3baf2ce346273b53dd61fdbecf4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 06be6b149f7e406bcf16098567f5a6c9f042bced 50f1b690b4868923fbd242298def2fb88662f108 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 06be6b149f7e406bcf16098567f5a6c9f042bced d5ad6ab61cbd89afdb60881f6274f74328af3ee9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.20 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.10 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0-rc5 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"23444","cve":"CVE-2026-23444","epss":"0.000170000","percentile":"0.039750000","score_date":"2026-04-07","updated_at":"2026-04-08 00:03:39"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/wireless/ath/ath9k/channel.c","drivers/net/wireless/mediatek/mt76/scan.c","drivers/net/wireless/virtual/mac80211_hwsim.c","include/net/mac80211.h","net/mac80211/tx.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"06e769dddcbeb3baf2ce346273b53dd61fdbecf4","status":"affected","version":"06be6b149f7e406bcf16098567f5a6c9f042bced","versionType":"git"},{"lessThan":"50f1b690b4868923fbd242298def2fb88662f108","status":"affected","version":"06be6b149f7e406bcf16098567f5a6c9f042bced","versionType":"git"},{"lessThan":"d5ad6ab61cbd89afdb60881f6274f74328af3ee9","status":"affected","version":"06be6b149f7e406bcf16098567f5a6c9f042bced","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/wireless/ath/ath9k/channel.c","drivers/net/wireless/mediatek/mt76/scan.c","drivers/net/wireless/virtual/mac80211_hwsim.c","include/net/mac80211.h","net/mac80211/tx.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.13"},{"lessThan":"3.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.20","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0-rc5","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.20","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.10","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0-rc5","versionStartIncluding":"3.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-04-03T15:15:28.464Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/06e769dddcbeb3baf2ce346273b53dd61fdbecf4"},{"url":"https://git.kernel.org/stable/c/50f1b690b4868923fbd242298def2fb88662f108"},{"url":"https://git.kernel.org/stable/c/d5ad6ab61cbd89afdb60881f6274f74328af3ee9"}],"title":"wifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-23444","datePublished":"2026-04-03T15:15:28.464Z","dateReserved":"2026-01-13T15:37:46.019Z","dateUpdated":"2026-04-03T15:15:28.464Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-03 16:16:28","lastModifiedDate":"2026-04-07 13:21:09","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"23444","Ordinal":"1","Title":"wifi: mac80211: always free skb on ieee80211_tx_prepare_skb() fa","CVE":"CVE-2026-23444","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"23444","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"wifi: mac80211: always free skb on ieee80211_tx_prepare_skb() fa"}]}}}