{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2022-50881", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-50881", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-12-30T12:23:20.343Z", "updatedAt": "2026-05-23T15:25:24.938Z", "importedAt": "2026-10-24T01:56:49.724Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "wifi: ath9k: Fix use-after-free in ath9k_hif_usb_disconnect()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath9k: Fix use-after-free in ath9k_hif_usb_disconnect()\n\nThis patch fixes a use-after-free in ath9k that occurs in\nath9k_hif_usb_disconnect() when ath9k_destroy_wmi() is trying to access\n'drv_priv' that has already been freed by ieee80211_free_hw(), called by\nath9k_htc_hw_deinit(). The patch moves ath9k_destroy_wmi() before\nieee80211_free_hw(). Note that urbs from the driver should be killed\nbefore freeing 'wmi' with ath9k_destroy_wmi() as their callbacks will\naccess 'wmi'.\n\nFound by a modified version of syzkaller.\n\n==================================================================\nBUG: KASAN: use-after-free in ath9k_destroy_wmi+0x38/0x40\nRead of size 8 at addr ffff8881069132a0 by task kworker/0:1/7\n\nCPU: 0 PID: 7 Comm: kworker/0:1 Tainted: G O 5.14.0+ #131\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014\nWorkqueue: usb_hub_wq hub_event\nCall Trace:\n dump_stack_lvl+0x8e/0xd1\n print_address_description.constprop.0.cold+0x93/0x334\n ? ath9k_destroy_wmi+0x38/0x40\n ? ath9k_destroy_wmi+0x38/0x40\n kasan_report.cold+0x83/0xdf\n ? ath9k_destroy_wmi+0x38/0x40\n ath9k_destroy_wmi+0x38/0x40\n ath9k_hif_usb_disconnect+0x329/0x3f0\n ? ath9k_hif_usb_suspend+0x120/0x120\n ? usb_disable_interface+0xfc/0x180\n usb_unbind_interface+0x19b/0x7e0\n ? usb_autoresume_device+0x50/0x50\n device_release_driver_internal+0x44d/0x520\n bus_remove_device+0x2e5/0x5a0\n device_del+0x5b2/0xe30\n ? __device_link_del+0x370/0x370\n ? usb_remove_ep_devs+0x43/0x80\n ? remove_intf_ep_devs+0x112/0x1a0\n usb_disable_device+0x1e3/0x5a0\n usb_disconnect+0x267/0x870\n hub_event+0x168d/0x3950\n ? rcu_read_lock_sched_held+0xa1/0xd0\n ? hub_port_debounce+0x2e0/0x2e0\n ? check_irq_usage+0x860/0xf20\n ? drain_workqueue+0x281/0x360\n ? lock_release+0x640/0x640\n ? rcu_read_lock_sched_held+0xa1/0xd0\n ? rcu_read_lock_bh_held+0xb0/0xb0\n ? lockdep_hardirqs_on_prepare+0x273/0x3e0\n process_one_work+0x92b/0x1460\n ? pwq_dec_nr_in_flight+0x330/0x330\n ? rwlock_bug.part.0+0x90/0x90\n worker_thread+0x95/0xe00\n ? __kthread_parkme+0x115/0x1e0\n ? process_one_work+0x1460/0x1460\n kthread+0x3a1/0x480\n ? set_kthread_struct+0x120/0x120\n ret_from_fork+0x1f/0x30\n\nThe buggy address belongs to the page:\npage:ffffea00041a44c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106913\nflags: 0x200000000000000(node=0|zone=2)\nraw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000\nraw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\npage_owner tracks the page as freed\npage last allocated via order 3, migratetype Unmovable, gfp_mask 0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), pid 7, ts 38347963444, free_ts 41399957635\n prep_new_page+0x1aa/0x240\n get_page_from_freelist+0x159a/0x27c0\n __alloc_pages+0x2da/0x6a0\n alloc_pages+0xec/0x1e0\n kmalloc_order+0x39/0xf0\n kmalloc_order_trace+0x19/0x120\n __kmalloc+0x308/0x390\n wiphy_new_nm+0x6f5/0x1dd0\n ieee80211_alloc_hw_nm+0x36d/0x2230\n ath9k_htc_probe_device+0x9d/0x1e10\n ath9k_htc_hw_init+0x34/0x50\n ath9k_hif_usb_firmware_cb+0x25f/0x4e0\n request_firmware_work_func+0x131/0x240\n process_one_work+0x92b/0x1460\n worker_thread+0x95/0xe00\n kthread+0x3a1/0x480\npage last free stack trace:\n free_pcp_prepare+0x3d3/0x7f0\n free_unref_page+0x1e/0x3d0\n device_release+0xa4/0x240\n kobject_put+0x186/0x4c0\n put_device+0x20/0x30\n ath9k_htc_disconnect_device+0x1cf/0x2c0\n ath9k_htc_hw_deinit+0x26/0x30\n ath9k_hif_usb_disconnect+0x2d9/0x3f0\n usb_unbind_interface+0x19b/0x7e0\n device_release_driver_internal+0x44d/0x520\n bus_remove_device+0x2e5/0x5a0\n device_del+0x5b2/0xe30\n usb_disable_device+0x1e3/0x5a0\n usb_disconnect+0x267/0x870\n hub_event+0x168d/0x3950\n process_one_work+0x92b/0x1460\n\nMemory state around the buggy address:\n ffff888106913180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n ffff888106913200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n>ffff888\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "abeaa85054ff8cfe8b99aafc5c70ea067e5d0908", "status": "affected", "versionType": "git", "lessThan": "99ff971b62e5bd5dee65bbe9777375206f5db791" }, { "version": "abeaa85054ff8cfe8b99aafc5c70ea067e5d0908", "status": "affected", "versionType": "git", "lessThan": "634a5471a6bd774c0d0fa448dfa6ec593e899ec9" }, { "version": "abeaa85054ff8cfe8b99aafc5c70ea067e5d0908", "status": "affected", "versionType": "git", "lessThan": "1f137c634a8c8faba648574f687805641e62f92e" }, { "version": "abeaa85054ff8cfe8b99aafc5c70ea067e5d0908", "status": "affected", "versionType": "git", "lessThan": "de15e8bbd9eb26fe94a06d0ec7be82dc490eb729" }, { "version": "abeaa85054ff8cfe8b99aafc5c70ea067e5d0908", "status": "affected", "versionType": "git", "lessThan": "f099c5c9e2ba08a379bd354a82e05ef839ae29ac" }, { "version": "5c42f9bfb4c22898ed3d2806d75e2e58522a5edd", "status": "affected", "versionType": "git" }, { "version": "44736603a7099d2a9b48c669e43a689588e272a5", "status": "affected", "versionType": "git" }, { "version": "406a2fbfabbf7ed9ed21884a82c07fabc6fe0b68", "status": "affected", "versionType": "git" }, { "version": "66a4ca83d50bb38c814190af2188868153cce5de", "status": "affected", "versionType": "git" }, { "version": "3eb802924486a923585b344340a5536d91989a45", "status": "affected", "versionType": "git" }, { "version": "1bc633311a37913293c3c0a1b0f5261c49e3d5dc", "status": "affected", "versionType": "git" }, { "version": "378d2734bf603bac4959bce2cadf5927aa2beffc", "status": "affected", "versionType": "git" }, { "version": "4.4.228", "status": "affected", "versionType": "semver", "lessThan": "4.5" }, { "version": "4.9.228", "status": "affected", "versionType": "semver", "lessThan": "4.10" }, { "version": "4.14.185", "status": "affected", "versionType": "semver", "lessThan": "4.15" }, { "version": "4.19.129", "status": "affected", "versionType": "semver", "lessThan": "4.20" }, { "version": "5.4.47", "status": "affected", "versionType": "semver", "lessThan": "5.5" }, { "version": "5.6.19", "status": "affected", "versionType": "semver", "lessThan": "5.7" }, { "version": "5.7.3", "status": "affected", "versionType": "semver", "lessThan": "5.8" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.8", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.8" }, { "version": "5.10.173", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.99", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.16", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.2.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.2.*" }, { "version": "6.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }