{"id":"CVE-2026-68344","summary":"usb: atm: ueagle-atm: reject descriptors that confuse probe and disconnect","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: atm: ueagle-atm: reject descriptors that confuse probe and disconnect\n\nuea_probe() distinguishes a pre-firmware device from a post-firmware one\nusing the USB id (UEA_IS_PREFIRM()), and stores a different object as the\ninterface data in each case: a 'struct completion' for a pre-firmware\ndevice (to be waited on in .disconnect()), or a 'struct usbatm_data' for a\npost-firmware one.\n\nuea_disconnect() instead tells the two apart by the number of interfaces\nof the active configuration (a pre-firmware device exposes a single\ninterface, ADI930 has 2 and eagle has 3), and casts the interface data\naccordingly.\n\nBecause the two handlers use different criteria, a crafted device that\nadvertises a pre-firmware id together with a multi-interface descriptor\n(or a post-firmware id with a single interface) makes them disagree: the\nsmall 'struct completion' stored by uea_probe() is then passed to\nusbatm_usb_disconnect(), which casts it to 'struct usbatm_data' and takes\ninstance-\u003eserialize, reading past the end of the allocation:\n\n  BUG: KASAN: slab-out-of-bounds in __mutex_lock+0x152a/0x1b80\n  Read of size 8 at addr ffff8880470e2c60 by task kworker/1:2/982\n  ...\n   __mutex_lock+0x152a/0x1b80\n   usbatm_usb_disconnect+0x70/0x820\n   uea_disconnect+0x133/0x2c0\n   usb_unbind_interface+0x1dd/0x9e0\n  ...\n  which belongs to the cache kmalloc-96 of size 96\n  The buggy address is located 0 bytes to the right of\n   allocated 96-byte region [ffff8880470e2c00, ffff8880470e2c60)\n\nReject such inconsistent descriptors in uea_probe() so that both handlers\nalways make the same pre/post-firmware decision.","modified":"2026-08-21T03:30:44.127170904Z","published":"2026-08-10T12:03:20.917Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68344.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0cc0c4c14150bb5a16b88dd61368f96cd4caa9ce"},{"type":"WEB","url":"https://git.kernel.org/stable/c/71132cedd1ecbc4032d76e9928c18a10f7e39b80"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9904a46401198872ab3de34fd11f383831ef3428"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9e7312844429379108ea9523a5ed934f142bb177"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c035b1198906dd5bd3df9a3045b59254bad1ea7a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d0a57f19fe2865b9747484f5f9c631f944ed9a0f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e814ae925f6f575325124c29dde518b92c822b83"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f92832262718443feb4e5df2bf70424ba842629e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68344.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68344"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d85f19aaef42a03e3e4765d659c761c8750a7f23"},{"fixed":"9e7312844429379108ea9523a5ed934f142bb177"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"76861031b43a18065d13f9ffb8595d25c7576005"},{"fixed":"f92832262718443feb4e5df2bf70424ba842629e"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"bbfedc84714064ea4845e6b76f96316eb5bb65d8"},{"fixed":"e814ae925f6f575325124c29dde518b92c822b83"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f2a6abc670104fc3e383ee3b1cf35c070485e3df"},{"fixed":"c035b1198906dd5bd3df9a3045b59254bad1ea7a"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c581e30ae5b332d8acef64475a211b3f82099941"},{"fixed":"9904a46401198872ab3de34fd11f383831ef3428"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"509b51327320bdeaef1969248177a446ded073ab"},{"fixed":"d0a57f19fe2865b9747484f5f9c631f944ed9a0f"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ddcdac47e1f2651c7be60e299f98faf981522797"},{"fixed":"0cc0c4c14150bb5a16b88dd61368f96cd4caa9ce"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e2674dfbed8a30d57e2bc872c4bfa6c3eec918bf"},{"fixed":"71132cedd1ecbc4032d76e9928c18a10f7e39b80"}]}],"versions":["v5.10.264","v5.10.263","v5.10.262","v5.10.261","v5.15.215","v5.15.214","v5.15.213","v5.15.212","v6.1.182","v6.1.181","v6.1.180","v6.1.179","v6.1.178","v6.6.147","v6.6.146","v6.6.145","v6.12.100","v6.12.99","v6.12.98","v6.12.97","v6.18.41","v6.18.40","v7.1.5"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68344.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.10.261"},{"fixed":"5.10.265"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.15.212"},{"fixed":"5.15.216"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.1.178"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.6.145"},{"fixed":"6.6.148"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.12.97"},{"fixed":"6.12.101"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.18.40"},{"fixed":"6.18.42"}]},{"type":"ECOSYSTEM","events":[{"introduced":"7.1.5"},{"fixed":"7.1.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68344.json"}}],"schema_version":"1.9.0"}