{"api_version":"1","generated_at":"2026-08-16T15:20:01+00:00","cve":"CVE-2026-74554","urls":{"html":"https://cve.report/CVE-2026-74554","api":"https://cve.report/api/cve/CVE-2026-74554.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74554","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74554"},"summary":{"title":"wifi: ath12k: fix out-of-bounds clear_bit in ath12k_mac_dp_peer_cleanup()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: fix out-of-bounds clear_bit in ath12k_mac_dp_peer_cleanup()\n\nath12k_mac_dp_peer_cleanup() clears the ML peer ID slot on the\nfree_ml_peer_id_map bitmap by indexing it with dp_peer->peer_id. That is\nwrong: dp_peer->peer_id for an MLO peer always carries the\nATH12K_PEER_ML_ID_VALID bit (BIT(13)), so clear_bit() is invoked with\nindex >= 0x2000, which is far outside the bitmap of ATH12K_MAX_MLO_PEERS\n(256) bits and corrupts memory adjacent to ah->free_ml_peer_id_map. The\nintended bitmap entry also never gets cleared, so subsequent\nath12k_peer_ml_alloc() calls eventually run out of IDs.\n\nThe ID without the VALID bit is what ath12k_peer_ml_alloc() returned and\nis stored in ahsta->ml_peer_id. Use that instead.\n\nWhile there, also reset ahsta->ml_peer_id to ATH12K_MLO_PEER_ID_INVALID so\nthe bitmap and ahsta->ml_peer_id stay in sync.\n\nTested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 13:18:00","updated_at":"2026-08-15 13:18:00"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/47abd2ca281531deee38a3b3770d885e270e9fc9","name":"https://git.kernel.org/stable/c/47abd2ca281531deee38a3b3770d885e270e9fc9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/234b5cb81e6fcc1e3b31b13deff66130be55f36e","name":"https://git.kernel.org/stable/c/234b5cb81e6fcc1e3b31b13deff66130be55f36e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74554","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74554","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ee16dcf573d5e3283fda601dd4bca6bc52251017 234b5cb81e6fcc1e3b31b13deff66130be55f36e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ee16dcf573d5e3283fda601dd4bca6bc52251017 47abd2ca281531deee38a3b3770d885e270e9fc9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.8 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc6 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/wireless/ath/ath12k/mac.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"234b5cb81e6fcc1e3b31b13deff66130be55f36e","status":"affected","version":"ee16dcf573d5e3283fda601dd4bca6bc52251017","versionType":"git"},{"lessThan":"47abd2ca281531deee38a3b3770d885e270e9fc9","status":"affected","version":"ee16dcf573d5e3283fda601dd4bca6bc52251017","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/wireless/ath/ath12k/mac.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"7.0"},{"lessThan":"7.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc6","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.8","versionStartIncluding":"7.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc6","versionStartIncluding":"7.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: fix out-of-bounds clear_bit in ath12k_mac_dp_peer_cleanup()\n\nath12k_mac_dp_peer_cleanup() clears the ML peer ID slot on the\nfree_ml_peer_id_map bitmap by indexing it with dp_peer->peer_id. That is\nwrong: dp_peer->peer_id for an MLO peer always carries the\nATH12K_PEER_ML_ID_VALID bit (BIT(13)), so clear_bit() is invoked with\nindex >= 0x2000, which is far outside the bitmap of ATH12K_MAX_MLO_PEERS\n(256) bits and corrupts memory adjacent to ah->free_ml_peer_id_map. The\nintended bitmap entry also never gets cleared, so subsequent\nath12k_peer_ml_alloc() calls eventually run out of IDs.\n\nThe ID without the VALID bit is what ath12k_peer_ml_alloc() returned and\nis stored in ahsta->ml_peer_id. Use that instead.\n\nWhile there, also reset ahsta->ml_peer_id to ATH12K_MLO_PEER_ID_INVALID so\nthe bitmap and ahsta->ml_peer_id stay in sync.\n\nTested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3"}],"providerMetadata":{"dateUpdated":"2026-08-15T12:28:00.097Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/234b5cb81e6fcc1e3b31b13deff66130be55f36e"},{"url":"https://git.kernel.org/stable/c/47abd2ca281531deee38a3b3770d885e270e9fc9"}],"title":"wifi: ath12k: fix out-of-bounds clear_bit in ath12k_mac_dp_peer_cleanup()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74554","datePublished":"2026-08-15T12:28:00.097Z","dateReserved":"2026-08-15T05:44:03.916Z","dateUpdated":"2026-08-15T12:28:00.097Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 13:18:00","lastModifiedDate":"2026-08-15 13:18:00","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74554","Ordinal":"1","Title":"wifi: ath12k: fix out-of-bounds clear_bit in ath12k_mac_dp_peer_","CVE":"CVE-2026-74554","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74554","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: fix out-of-bounds clear_bit in ath12k_mac_dp_peer_cleanup()\n\nath12k_mac_dp_peer_cleanup() clears the ML peer ID slot on the\nfree_ml_peer_id_map bitmap by indexing it with dp_peer->peer_id. That is\nwrong: dp_peer->peer_id for an MLO peer always carries the\nATH12K_PEER_ML_ID_VALID bit (BIT(13)), so clear_bit() is invoked with\nindex >= 0x2000, which is far outside the bitmap of ATH12K_MAX_MLO_PEERS\n(256) bits and corrupts memory adjacent to ah->free_ml_peer_id_map. The\nintended bitmap entry also never gets cleared, so subsequent\nath12k_peer_ml_alloc() calls eventually run out of IDs.\n\nThe ID without the VALID bit is what ath12k_peer_ml_alloc() returned and\nis stored in ahsta->ml_peer_id. Use that instead.\n\nWhile there, also reset ahsta->ml_peer_id to ATH12K_MLO_PEER_ID_INVALID so\nthe bitmap and ahsta->ml_peer_id stay in sync.\n\nTested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3","Type":"Description","Title":"wifi: ath12k: fix out-of-bounds clear_bit in ath12k_mac_dp_peer_"}]}}}