{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"lessThan":"47ed81aaa7f94d9808f4719e78a760c2ec1e6c86","status":"affected","version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","versionType":"git"},{"lessThan":"48de0c6952192b0771fca468df4364d11ec74ad9","status":"affected","version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","versionType":"git"},{"lessThan":"063497cc9f320ab71a7a937c3bc0a23e630aefe2","status":"affected","version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","versionType":"git"},{"lessThan":"7f184ca38a90889f3f6665ff96748b95da39dbee","status":"affected","version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","versionType":"git"},{"lessThan":"10b0ce629123a3737b4eda50188f73bb7be7b68b","status":"affected","version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","versionType":"git"},{"lessThan":"48a69cedde7388294e4ea6fd804156cd62bc04fc","status":"affected","version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","versionType":"git"},{"lessThan":"7c9046d92c4b9789c9d9d775e4fd5f34be64cb0a","status":"affected","version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","versionType":"git"},{"lessThan":"dad9f96945d77ecd4708f730c06ef54dcd8cc057","status":"affected","version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"status":"affected","version":"4.4"},{"lessThan":"4.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.265","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.216","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.148","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cveId":"CVE-2026-68363","cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath9k: hif_usb: don't dereference hif_dev after re-arming firmware request\n\nath9k_hif_request_firmware() re-arms an asynchronous firmware load via\nrequest_firmware_nowait(), passing hif_dev as the completion context, and\nthen still dereferences hif_dev:\n\n\tdev_info(&hif_dev->udev->dev, \"ath9k_htc: Firmware %s requested\\n\",\n\t\t hif_dev->fw_name);\n\nThe re-armed callback ath9k_hif_usb_firmware_cb() runs on the \"events\"\nworkqueue and, when the firmware is missing, walks the retry chain into\nath9k_hif_usb_firmware_fail() -> complete_all(&hif_dev->fw_done). That\nreleases the wait_for_completion(&hif_dev->fw_done) in a concurrent\nath9k_hif_usb_disconnect(), which then kfree()s hif_dev. The trailing\ndev_info() in the frame that re-armed the request can therefore read freed\nmemory (hif_dev->udev, the first field of struct hif_device_usb):\n\n  BUG: KASAN: slab-use-after-free in ath9k_hif_request_firmware\n  Read of size 8 ... by task kworker/...\n   ath9k_hif_request_firmware\n   ath9k_hif_usb_firmware_cb           drivers/net/wireless/ath/ath9k/hif_usb.c:1247\n   request_firmware_work_func\n  Allocated by ...:\n   ath9k_hif_usb_probe                 drivers/net/wireless/ath/ath9k/hif_usb.c\n  Freed by ...:\n   ath9k_hif_usb_disconnect -> kfree   drivers/net/wireless/ath/ath9k/hif_usb.c\n\nThe fw_done barrier only makes disconnect wait for the firmware chain to\n*terminate*; it does not protect the outer ath9k_hif_request_firmware()\nframe that re-armed the request and keeps touching hif_dev afterwards.\n\nDrop the post-request dev_info(): it is the only use of hif_dev after the\nasync request is armed, and it is purely informational (the dev_err() on the\nfailure path runs only when request_firmware_nowait() did not arm a callback,\nso hif_dev is still alive there).\n\nThis was first reported by syzbot as a single, non-reproduced crash that was\nlater auto-obsoleted, and was independently rediscovered by the reFuzz fuzzer,\nwhich produced a C reproducer (USB-gadget connect/disconnect of an ath9k_htc\ndevice whose firmware download fails). The vulnerable code is unchanged and\nstill present in v7.1-rc6, where the slab-use-after-free reproduces under KASAN\nonce the (sub-microsecond) race window is widened.","epss":{"date":"2026-11-06","percentile":0.08105,"score":0.00184},"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793985570483,"publishedAt":1786363420355,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/47ed81aaa7f94d9808f4719e78a760c2ec1e6c86"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/48de0c6952192b0771fca468df4364d11ec74ad9"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/063497cc9f320ab71a7a937c3bc0a23e630aefe2"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/7f184ca38a90889f3f6665ff96748b95da39dbee"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/10b0ce629123a3737b4eda50188f73bb7be7b68b"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/48a69cedde7388294e4ea6fd804156cd62bc04fc"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/7c9046d92c4b9789c9d9d775e4fd5f34be64cb0a"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/dad9f96945d77ecd4708f730c06ef54dcd8cc057"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/063497cc9f320ab71a7a937c3bc0a23e630aefe2"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/10b0ce629123a3737b4eda50188f73bb7be7b68b"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/47ed81aaa7f94d9808f4719e78a760c2ec1e6c86"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/48a69cedde7388294e4ea6fd804156cd62bc04fc"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/48de0c6952192b0771fca468df4364d11ec74ad9"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/7c9046d92c4b9789c9d9d775e4fd5f34be64cb0a"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/7f184ca38a90889f3f6665ff96748b95da39dbee"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/dad9f96945d77ecd4708f730c06ef54dcd8cc057"}],"remediation":[],"revision":"f11c647ee652a8d91d525d3c0f29650348f24627c2ad411b78e4f73d22f4b31b","sources":[{"modifiedAt":1793984114386,"name":"CNA: Linux","retrievedAt":1793985981150,"url":"https://www.cve.org/CVERecord?id=CVE-2026-68363"},{"modifiedAt":1793985570483,"name":"NVD","retrievedAt":1793989637909,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68363"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793985994492,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-68363"}],"ssvc":{"assessedAt":1793983687946,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"wifi: ath9k: hif_usb: don't dereference hif_dev after re-arming firmware request","updatedAt":1793989637909}