{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68363","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-30T09:28:09.385Z","datePublished":"2026-08-10T12:03:40.355Z","dateUpdated":"2026-08-19T16:34:18.694Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-19T16:34:18.694Z"},"descriptions":[{"lang":"en","value":"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."}],"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/ath9k/hif_usb.c"],"versions":[{"version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","lessThan":"47ed81aaa7f94d9808f4719e78a760c2ec1e6c86","status":"affected","versionType":"git"},{"version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","lessThan":"48de0c6952192b0771fca468df4364d11ec74ad9","status":"affected","versionType":"git"},{"version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","lessThan":"063497cc9f320ab71a7a937c3bc0a23e630aefe2","status":"affected","versionType":"git"},{"version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","lessThan":"7f184ca38a90889f3f6665ff96748b95da39dbee","status":"affected","versionType":"git"},{"version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","lessThan":"10b0ce629123a3737b4eda50188f73bb7be7b68b","status":"affected","versionType":"git"},{"version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","lessThan":"48a69cedde7388294e4ea6fd804156cd62bc04fc","status":"affected","versionType":"git"},{"version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","lessThan":"7c9046d92c4b9789c9d9d775e4fd5f34be64cb0a","status":"affected","versionType":"git"},{"version":"e904cf6fe23022cde4e0ea9d41601411a315a3dc","lessThan":"dad9f96945d77ecd4708f730c06ef54dcd8cc057","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/ath9k/hif_usb.c"],"versions":[{"version":"4.4","status":"affected"},{"version":"0","lessThan":"4.4","status":"unaffected","versionType":"semver"},{"version":"5.10.265","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.216","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.6","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":"4.4","versionEndExcluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/47ed81aaa7f94d9808f4719e78a760c2ec1e6c86"},{"url":"https://git.kernel.org/stable/c/48de0c6952192b0771fca468df4364d11ec74ad9"},{"url":"https://git.kernel.org/stable/c/063497cc9f320ab71a7a937c3bc0a23e630aefe2"},{"url":"https://git.kernel.org/stable/c/7f184ca38a90889f3f6665ff96748b95da39dbee"},{"url":"https://git.kernel.org/stable/c/10b0ce629123a3737b4eda50188f73bb7be7b68b"},{"url":"https://git.kernel.org/stable/c/48a69cedde7388294e4ea6fd804156cd62bc04fc"},{"url":"https://git.kernel.org/stable/c/7c9046d92c4b9789c9d9d775e4fd5f34be64cb0a"},{"url":"https://git.kernel.org/stable/c/dad9f96945d77ecd4708f730c06ef54dcd8cc057"}],"title":"wifi: ath9k: hif_usb: don't dereference hif_dev after re-arming firmware request","x_generator":{"engine":"bippy-1.2.0"}}}}