{"id":"CVE-2026-68344","state":"PUBLISHED","title":"usb: atm: ueagle-atm: reject descriptors that confuse probe and disconnect","description":"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->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.","publishedAt":"2026-08-10T12:03:20.917Z","updatedAt":"2026-08-19T16:33:45.376Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d85f19aaef42a03e3e4765d659c761c8750a7f23","status":"affected","lessThan":"9e7312844429379108ea9523a5ed934f142bb177","versionType":"git"},{"version":"76861031b43a18065d13f9ffb8595d25c7576005","status":"affected","lessThan":"f92832262718443feb4e5df2bf70424ba842629e","versionType":"git"},{"version":"bbfedc84714064ea4845e6b76f96316eb5bb65d8","status":"affected","lessThan":"e814ae925f6f575325124c29dde518b92c822b83","versionType":"git"},{"version":"f2a6abc670104fc3e383ee3b1cf35c070485e3df","status":"affected","lessThan":"c035b1198906dd5bd3df9a3045b59254bad1ea7a","versionType":"git"},{"version":"c581e30ae5b332d8acef64475a211b3f82099941","status":"affected","lessThan":"9904a46401198872ab3de34fd11f383831ef3428","versionType":"git"},{"version":"509b51327320bdeaef1969248177a446ded073ab","status":"affected","lessThan":"d0a57f19fe2865b9747484f5f9c631f944ed9a0f","versionType":"git"},{"version":"ddcdac47e1f2651c7be60e299f98faf981522797","status":"affected","lessThan":"0cc0c4c14150bb5a16b88dd61368f96cd4caa9ce","versionType":"git"},{"version":"e2674dfbed8a30d57e2bc872c4bfa6c3eec918bf","status":"affected","lessThan":"71132cedd1ecbc4032d76e9928c18a10f7e39b80","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/atm/ueagle-atm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5.10.261","status":"affected","lessThan":"5.10.265","versionType":"semver"},{"version":"5.15.212","status":"affected","lessThan":"5.15.216","versionType":"semver"},{"version":"6.1.178","status":"affected","lessThan":"6.1.183","versionType":"semver"},{"version":"6.6.145","status":"affected","lessThan":"6.6.148","versionType":"semver"},{"version":"6.12.97","status":"affected","lessThan":"6.12.101","versionType":"semver"},{"version":"6.18.40","status":"affected","lessThan":"6.18.42","versionType":"semver"},{"version":"7.1.5","status":"affected","lessThan":"7.1.6","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/atm/ueagle-atm.c"]}],"references":["https://git.kernel.org/stable/c/9e7312844429379108ea9523a5ed934f142bb177","https://git.kernel.org/stable/c/f92832262718443feb4e5df2bf70424ba842629e","https://git.kernel.org/stable/c/e814ae925f6f575325124c29dde518b92c822b83","https://git.kernel.org/stable/c/c035b1198906dd5bd3df9a3045b59254bad1ea7a","https://git.kernel.org/stable/c/9904a46401198872ab3de34fd11f383831ef3428","https://git.kernel.org/stable/c/d0a57f19fe2865b9747484f5f9c631f944ed9a0f","https://git.kernel.org/stable/c/0cc0c4c14150bb5a16b88dd61368f96cd4caa9ce","https://git.kernel.org/stable/c/71132cedd1ecbc4032d76e9928c18a10f7e39b80"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68344.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68344","state":"PUBLISHED","datePublished":"2026-08-10T12:03:20.917Z","dateUpdated":"2026-08-19T16:33:45.376Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.384Z"},"containers":{"cna":{"title":"usb: atm: ueagle-atm: reject descriptors that confuse probe and disconnect","descriptions":[{"lang":"en","value":"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->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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d85f19aaef42a03e3e4765d659c761c8750a7f23","status":"affected","lessThan":"9e7312844429379108ea9523a5ed934f142bb177","versionType":"git"},{"version":"76861031b43a18065d13f9ffb8595d25c7576005","status":"affected","lessThan":"f92832262718443feb4e5df2bf70424ba842629e","versionType":"git"},{"version":"bbfedc84714064ea4845e6b76f96316eb5bb65d8","status":"affected","lessThan":"e814ae925f6f575325124c29dde518b92c822b83","versionType":"git"},{"version":"f2a6abc670104fc3e383ee3b1cf35c070485e3df","status":"affected","lessThan":"c035b1198906dd5bd3df9a3045b59254bad1ea7a","versionType":"git"},{"version":"c581e30ae5b332d8acef64475a211b3f82099941","status":"affected","lessThan":"9904a46401198872ab3de34fd11f383831ef3428","versionType":"git"},{"version":"509b51327320bdeaef1969248177a446ded073ab","status":"affected","lessThan":"d0a57f19fe2865b9747484f5f9c631f944ed9a0f","versionType":"git"},{"version":"ddcdac47e1f2651c7be60e299f98faf981522797","status":"affected","lessThan":"0cc0c4c14150bb5a16b88dd61368f96cd4caa9ce","versionType":"git"},{"version":"e2674dfbed8a30d57e2bc872c4bfa6c3eec918bf","status":"affected","lessThan":"71132cedd1ecbc4032d76e9928c18a10f7e39b80","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/atm/ueagle-atm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5.10.261","status":"affected","lessThan":"5.10.265","versionType":"semver"},{"version":"5.15.212","status":"affected","lessThan":"5.15.216","versionType":"semver"},{"version":"6.1.178","status":"affected","lessThan":"6.1.183","versionType":"semver"},{"version":"6.6.145","status":"affected","lessThan":"6.6.148","versionType":"semver"},{"version":"6.12.97","status":"affected","lessThan":"6.12.101","versionType":"semver"},{"version":"6.18.40","status":"affected","lessThan":"6.18.42","versionType":"semver"},{"version":"7.1.5","status":"affected","lessThan":"7.1.6","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/atm/ueagle-atm.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-19T16:33:45.376Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.261","versionEndExcluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.212","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.178","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.145","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.97","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18.40","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.1.5","versionEndExcluding":"7.1.6"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}