{"id":"CVE-2026-68344","title":"usb: atm: ueagle-atm: reject descriptors that confuse probe and disconnect","summary":"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 (U…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= d85f19aaef42a03e3e4765d659c761c8750a7f23 < 9e7312844429379108ea9523a5ed934f142bb177","Linux >= 76861031b43a18065d13f9ffb8595d25c7576005 < f92832262718443feb4e5df2bf70424ba842629e","Linux >= bbfedc84714064ea4845e6b76f96316eb5bb65d8 < e814ae925f6f575325124c29dde518b92c822b83","Linux >= f2a6abc670104fc3e383ee3b1cf35c070485e3df < c035b1198906dd5bd3df9a3045b59254bad1ea7a","Linux >= c581e30ae5b332d8acef64475a211b3f82099941 < 9904a46401198872ab3de34fd11f383831ef3428","Linux >= 509b51327320bdeaef1969248177a446ded073ab < d0a57f19fe2865b9747484f5f9c631f944ed9a0f","Linux >= ddcdac47e1f2651c7be60e299f98faf981522797 < 0cc0c4c14150bb5a16b88dd61368f96cd4caa9ce","Linux >= e2674dfbed8a30d57e2bc872c4bfa6c3eec918bf < 71132cedd1ecbc4032d76e9928c18a10f7e39b80","Linux >= 5.10.261 < 5.10.265","Linux >= 5.15.212 < 5.15.216","Linux >= 6.1.178 < 6.1.183","Linux >= 6.6.145 < 6.6.148","Linux >= 6.12.97 < 6.12.101","Linux >= 6.18.40 < 6.18.42","Linux >= 7.1.5 < 7.1.6"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:47:34.418277Z"},"published":"2026-08-10","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:55:13.605Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68344","references":[{"url":"https://git.kernel.org/stable/c/9e7312844429379108ea9523a5ed934f142bb177"},{"url":"https://git.kernel.org/stable/c/f92832262718443feb4e5df2bf70424ba842629e"},{"url":"https://git.kernel.org/stable/c/e814ae925f6f575325124c29dde518b92c822b83"},{"url":"https://git.kernel.org/stable/c/c035b1198906dd5bd3df9a3045b59254bad1ea7a"},{"url":"https://git.kernel.org/stable/c/9904a46401198872ab3de34fd11f383831ef3428"},{"url":"https://git.kernel.org/stable/c/d0a57f19fe2865b9747484f5f9c631f944ed9a0f"},{"url":"https://git.kernel.org/stable/c/0cc0c4c14150bb5a16b88dd61368f96cd4caa9ce"},{"url":"https://git.kernel.org/stable/c/71132cedd1ecbc4032d76e9928c18a10f7e39b80"}],"tags":["cve.org"],"epss":0.00216,"epssPercentile":0.12141,"ingestedAt":"2026-11-06T18:00:12.611Z","slug":"CVE-2026-68344","body":"## Overview\n\nIn 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->serialize, 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.\n\n## Affected\n\n- `Linux >= d85f19aaef42a03e3e4765d659c761c8750a7f23 < 9e7312844429379108ea9523a5ed934f142bb177`\n- `Linux >= 76861031b43a18065d13f9ffb8595d25c7576005 < f92832262718443feb4e5df2bf70424ba842629e`\n- `Linux >= bbfedc84714064ea4845e6b76f96316eb5bb65d8 < e814ae925f6f575325124c29dde518b92c822b83`\n- `Linux >= f2a6abc670104fc3e383ee3b1cf35c070485e3df < c035b1198906dd5bd3df9a3045b59254bad1ea7a`\n- `Linux >= c581e30ae5b332d8acef64475a211b3f82099941 < 9904a46401198872ab3de34fd11f383831ef3428`\n- `Linux >= 509b51327320bdeaef1969248177a446ded073ab < d0a57f19fe2865b9747484f5f9c631f944ed9a0f`\n- `Linux >= ddcdac47e1f2651c7be60e299f98faf981522797 < 0cc0c4c14150bb5a16b88dd61368f96cd4caa9ce`\n- `Linux >= e2674dfbed8a30d57e2bc872c4bfa6c3eec918bf < 71132cedd1ecbc4032d76e9928c18a10f7e39b80`\n- `Linux >= 5.10.261 < 5.10.265`\n- `Linux >= 5.15.212 < 5.15.216`\n- `Linux >= 6.1.178 < 6.1.183`\n- `Linux >= 6.6.145 < 6.6.148`\n- `Linux >= 6.12.97 < 6.12.101`\n- `Linux >= 6.18.40 < 6.18.42`\n- `Linux >= 7.1.5 < 7.1.6`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}