CVE-2026-74366

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74366", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.888Z", "datePublished": "2026-08-15T05:58:48.264Z", "dateUpdated": "2026-08-17T05:18:01.222Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:18:01.222Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: fix NULL deref in change_sta_links for unready link\n\n_ieee80211_set_active_links() calls _ieee80211_link_use_channel() for\neach newly-added link and WARN_ON_ONCE()s if it fails. The call uses\nassign_on_failure=true, which allows mac80211 to continue despite\ndriver failures, but when a mac80211-level channel validation fails\n(e.g., combinations check, DFS, or no available radio),\ndrv_assign_vif_chanctx() is never reached. Since ath12k_mac_vdev_create()\nis only called from that path, arvif->is_created remains false and\narvif->ar remains NULL for the failed link.\n\nThe subsequent drv_change_sta_links() call reaches\nath12k_mac_op_change_sta_links(), which allocates an arsta and sets\nahsta->links_map |= BIT(link_id) for the broken link before checking\nwhether the link is ready. When the vdev was never created, only\nstation_add() is skipped, but the link remains in links_map.\n\nAny subsequent operation iterating links_map and dereferencing arvif->ar\nwithout a NULL check will crash. Two observed examples are NULL deref in\nath12k_mac_ml_station_remove() on disconnect and in ath12k_mac_op_set_key()\nwhen wpa_supplicant installs PTK keys.\n\n BUG: Unable to handle kernel NULL pointer dereference at 0x00000000\n pc : ath12k_mac_station_post_remove+0x40/0xe8 [ath12k]\n Call trace:\n ath12k_mac_station_post_remove+0x40/0xe8 [ath12k]\n ath12k_mac_op_sta_state+0xb60/0x1720 [ath12k]\n drv_sta_state+0x100/0xbd8 [mac80211]\n __sta_info_destroy_part2+0x148/0x178 [mac80211]\n ieee80211_set_disassoc+0x500/0x678 [mac80211]\n\n BUG: Unable to handle kernel NULL pointer dereference at 0x00000000\n pc : ath12k_mac_op_set_key+0x1f8/0x2c0 [ath12k]\n Call trace:\n ath12k_mac_op_set_key+0x1f8/0x2c0 [ath12k]\n drv_set_key+0x70/0x100 [mac80211]\n ieee80211_key_enable_hw_accel+0x78/0x260 [mac80211]\n ieee80211_add_key+0x16c/0x2ac [mac80211]\n nl80211_new_key+0x138/0x280 [cfg80211]\n\nFix this by checking arvif->is_created before calling\nath12k_mac_alloc_assign_link_sta(). This prevents the broken link from\nentering links_map, so all subsequent operations iterating the bitmap\nare protected. The reliability of arvif->is_created across all error\npaths is ensured by the preceding patch.\n\nTested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/ath/ath12k/mac.c"], "versions": [{"version": "a27fa6148dacc79451e523c2694bc0a673b1be05", "lessThan": "cfcea221db933295bf2cd75a7f80d441c7a51e28", "status": "affected", "versionType": "git"}, {"version": "a27fa6148dacc79451e523c2694bc0a673b1be05", "lessThan": "5f5be2aa3b6d730c51dd4f8b432f2ad72823e63f", "status": "affected", "versionType": "git"}, {"version": "a27fa6148dacc79451e523c2694bc0a673b1be05", "lessThan": "47809a7c8348bc4a332ccc26a37c7145a5f609f8", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/ath/ath12k/mac.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/cfcea221db933295bf2cd75a7f80d441c7a51e28"}, {"url": "https://git.kernel.org/stable/c/5f5be2aa3b6d730c51dd4f8b432f2ad72823e63f"}, {"url": "https://git.kernel.org/stable/c/47809a7c8348bc4a332ccc26a37c7145a5f609f8"}], "title": "wifi: ath12k: fix NULL deref in change_sta_links for unready link", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"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": "cfcea221db933295bf2cd75a7f80d441c7a51e28", "status": "affected", "version": "a27fa6148dacc79451e523c2694bc0a673b1be05", "versionType": "git"}, {"lessThan": "5f5be2aa3b6d730c51dd4f8b432f2ad72823e63f", "status": "affected", "version": "a27fa6148dacc79451e523c2694bc0a673b1be05", "versionType": "git"}, {"lessThan": "47809a7c8348bc4a332ccc26a37c7145a5f609f8", "status": "affected", "version": "a27fa6148dacc79451e523c2694bc0a673b1be05", "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": "6.14"}, {"lessThan": "6.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: fix NULL deref in change_sta_links for unready link\n\n_ieee80211_set_active_links() calls _ieee80211_link_use_channel() for\neach newly-added link and WARN_ON_ONCE()s if it fails. The call uses\nassign_on_failure=true, which allows mac80211 to continue despite\ndriver failures, but when a mac80211-level channel validation fails\n(e.g., combinations check, DFS, or no available radio),\ndrv_assign_vif_chanctx() is never reached. Since ath12k_mac_vdev_create()\nis only called from that path, arvif->is_created remains false and\narvif->ar remains NULL for the failed link.\n\nThe subsequent drv_change_sta_links() call reaches\nath12k_mac_op_change_sta_links(), which allocates an arsta and sets\nahsta->links_map |= BIT(link_id) for the broken link before checking\nwhether the link is ready. When the vdev was never created, only\nstation_add() is skipped, but the link remains in links_map.\n\nAny subsequent operation iterating links_map and dereferencing arvif->ar\nwithout a NULL check will crash. Two observed examples are NULL deref in\nath12k_mac_ml_station_remove() on disconnect and in ath12k_mac_op_set_key()\nwhen wpa_supplicant installs PTK keys.\n\n BUG: Unable to handle kernel NULL pointer dereference at 0x00000000\n pc : ath12k_mac_station_post_remove+0x40/0xe8 [ath12k]\n Call trace:\n ath12k_mac_station_post_remove+0x40/0xe8 [ath12k]\n ath12k_mac_op_sta_state+0xb60/0x1720 [ath12k]\n drv_sta_state+0x100/0xbd8 [mac80211]\n __sta_info_destroy_part2+0x148/0x178 [mac80211]\n ieee80211_set_disassoc+0x500/0x678 [mac80211]\n\n BUG: Unable to handle kernel NULL pointer dereference at 0x00000000\n pc : ath12k_mac_op_set_key+0x1f8/0x2c0 [ath12k]\n Call trace:\n ath12k_mac_op_set_key+0x1f8/0x2c0 [ath12k]\n drv_set_key+0x70/0x100 [mac80211]\n ieee80211_key_enable_hw_accel+0x78/0x260 [mac80211]\n ieee80211_add_key+0x16c/0x2ac [mac80211]\n nl80211_new_key+0x138/0x280 [cfg80211]\n\nFix this by checking arvif->is_created before calling\nath12k_mac_alloc_assign_link_sta(). This prevents the broken link from\nentering links_map, so all subsequent operations iterating the bitmap\nare protected. The reliability of arvif->is_created across all error\npaths is ensured by the preceding patch.\n\nTested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3"}], "id": "CVE-2026-74366", "lastModified": "2026-08-17T06:19:31.440", "metrics": {}, "published": "2026-08-15T06:22:38.287", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/47809a7c8348bc4a332ccc26a37c7145a5f609f8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5f5be2aa3b6d730c51dd4f8b432f2ad72823e63f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cfcea221db933295bf2cd75a7f80d441c7a51e28"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: wifi: ath12k: fix NULL deref in change_sta_links for unready link", "id": "2516907", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516907"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwifi: ath12k: fix NULL deref in change_sta_links for unready link\n_ieee80211_set_active_links() calls _ieee80211_link_use_channel() for\neach newly-added link and WARN_ON_ONCE()s if it fails. The call uses\nassign_on_failure=true, which allows mac80211 to continue despite\ndriver failures, but when a mac80211-level channel validation fails\n(e.g., combinations check, DFS, or no available radio),\ndrv_assign_vif_chanctx() is never reached. Since ath12k_mac_vdev_create()\nis only called from that path, arvif->is_created remains false and\narvif->ar remains NULL for the failed link.\nThe subsequent drv_change_sta_links() call reaches\nath12k_mac_op_change_sta_links(), which allocates an arsta and sets\nahsta->links_map |= BIT(link_id) for the broken link before checking\nwhether the link is ready. When the vdev was never created, only\nstation_add() is skipped, but the link remains in links_map.\nAny subsequent operation iterating links_map and dereferencing arvif->ar\nwithout a NULL check will crash. Two observed examples are NULL deref in\nath12k_mac_ml_station_remove() on disconnect and in ath12k_mac_op_set_key()\nwhen wpa_supplicant installs PTK keys.\nBUG: Unable to handle kernel NULL pointer dereference at 0x00000000\npc : ath12k_mac_station_post_remove+0x40/0xe8 [ath12k]\nCall trace:\nath12k_mac_station_post_remove+0x40/0xe8 [ath12k]\nath12k_mac_op_sta_state+0xb60/0x1720 [ath12k]\ndrv_sta_state+0x100/0xbd8 [mac80211]\n__sta_info_destroy_part2+0x148/0x178 [mac80211]\nieee80211_set_disassoc+0x500/0x678 [mac80211]\nBUG: Unable to handle kernel NULL pointer dereference at 0x00000000\npc : ath12k_mac_op_set_key+0x1f8/0x2c0 [ath12k]\nCall trace:\nath12k_mac_op_set_key+0x1f8/0x2c0 [ath12k]\ndrv_set_key+0x70/0x100 [mac80211]\nieee80211_key_enable_hw_accel+0x78/0x260 [mac80211]\nieee80211_add_key+0x16c/0x2ac [mac80211]\nnl80211_new_key+0x138/0x280 [cfg80211]\nFix this by checking arvif->is_created before calling\nath12k_mac_alloc_assign_link_sta(). This prevents the broken link from\nentering links_map, so all subsequent operations iterating the bitmap\nare protected. The reliability of arvif->is_created across all error\npaths is ensured by the preceding patch.\nTested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3", "A flaw was found in the Linux kernel's ath12k Wi-Fi driver. When a new Wi-Fi link fails to initialize correctly, the driver may attempt to access uninitialized data, leading to a null pointer dereference. This can cause the system to crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-74366", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74366\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74366\nhttps://lore.kernel.org/linux-cve-announce/2026081502-CVE-2026-74366-f843@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a27fa6148dacc79451e523c2694bc0a673b1be05,cfcea221db933295bf2cd75a7f80d441c7a51e28)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a27fa6148dacc79451e523c2694bc0a673b1be05,5f5be2aa3b6d730c51dd4f8b432f2ad72823e63f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a27fa6148dacc79451e523c2694bc0a673b1be05,47809a7c8348bc4a332ccc26a37c7145a5f609f8)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T13:30:04.659348+00:00", "updated": "2026-08-22T00:00:16.118197+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}