CVE-2026-68344 (GCVE-0-2026-68344)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:03 – Updated: 2026-08-19 16:33
VLAI
Title
usb: atm: ueagle-atm: reject descriptors that confuse probe and disconnect
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: atm: ueagle-atm: reject descriptors that confuse probe and disconnect uea_probe() distinguishes a pre-firmware device from a post-firmware one using the USB id (UEA_IS_PREFIRM()), and stores a different object as the interface data in each case: a 'struct completion' for a pre-firmware device (to be waited on in .disconnect()), or a 'struct usbatm_data' for a post-firmware one. uea_disconnect() instead tells the two apart by the number of interfaces of the active configuration (a pre-firmware device exposes a single interface, ADI930 has 2 and eagle has 3), and casts the interface data accordingly. Because the two handlers use different criteria, a crafted device that advertises a pre-firmware id together with a multi-interface descriptor (or a post-firmware id with a single interface) makes them disagree: the small 'struct completion' stored by uea_probe() is then passed to usbatm_usb_disconnect(), which casts it to 'struct usbatm_data' and takes instance->serialize, reading past the end of the allocation: BUG: KASAN: slab-out-of-bounds in __mutex_lock+0x152a/0x1b80 Read of size 8 at addr ffff8880470e2c60 by task kworker/1:2/982 ... __mutex_lock+0x152a/0x1b80 usbatm_usb_disconnect+0x70/0x820 uea_disconnect+0x133/0x2c0 usb_unbind_interface+0x1dd/0x9e0 ... which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes to the right of allocated 96-byte region [ffff8880470e2c00, ffff8880470e2c60) Reject such inconsistent descriptors in uea_probe() so that both handlers always make the same pre/post-firmware decision.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d85f19aaef42a03e3e4765d659c761c8750a7f23 , < 9e7312844429379108ea9523a5ed934f142bb177 (git)
Affected: 76861031b43a18065d13f9ffb8595d25c7576005 , < f92832262718443feb4e5df2bf70424ba842629e (git)
Affected: bbfedc84714064ea4845e6b76f96316eb5bb65d8 , < e814ae925f6f575325124c29dde518b92c822b83 (git)
Affected: f2a6abc670104fc3e383ee3b1cf35c070485e3df , < c035b1198906dd5bd3df9a3045b59254bad1ea7a (git)
Affected: c581e30ae5b332d8acef64475a211b3f82099941 , < 9904a46401198872ab3de34fd11f383831ef3428 (git)
Affected: 509b51327320bdeaef1969248177a446ded073ab , < d0a57f19fe2865b9747484f5f9c631f944ed9a0f (git)
Affected: ddcdac47e1f2651c7be60e299f98faf981522797 , < 0cc0c4c14150bb5a16b88dd61368f96cd4caa9ce (git)
Affected: e2674dfbed8a30d57e2bc872c4bfa6c3eec918bf , < 71132cedd1ecbc4032d76e9928c18a10f7e39b80 (git)
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Linux Linux Affected: 5.10.261 , < 5.10.265 (semver)
Affected: 5.15.212 , < 5.15.216 (semver)
Affected: 6.1.178 , < 6.1.183 (semver)
Affected: 6.6.145 , < 6.6.148 (semver)
Affected: 6.12.97 , < 6.12.101 (semver)
Affected: 6.18.40 , < 6.18.42 (semver)
Affected: 7.1.5 , < 7.1.6 (semver)
guessed Create a notification for this product.
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{
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      "descriptions": [
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          "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 \u0027struct completion\u0027 for a pre-firmware\ndevice (to be waited on in .disconnect()), or a \u0027struct usbatm_data\u0027 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 \u0027struct completion\u0027 stored by uea_probe() is then passed to\nusbatm_usb_disconnect(), which casts it to \u0027struct usbatm_data\u0027 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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:33:45.376Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/9e7312844429379108ea9523a5ed934f142bb177"
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          "url": "https://git.kernel.org/stable/c/9904a46401198872ab3de34fd11f383831ef3428"
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        },
        {
          "url": "https://git.kernel.org/stable/c/71132cedd1ecbc4032d76e9928c18a10f7e39b80"
        }
      ],
      "title": "usb: atm: ueagle-atm: reject descriptors that confuse probe and disconnect",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68344",
    "datePublished": "2026-08-10T12:03:20.917Z",
    "dateReserved": "2026-07-30T09:28:09.384Z",
    "dateUpdated": "2026-08-19T16:33:45.376Z",
    "state": "PUBLISHED"
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      "date": "2026-08-20",
      "epss": "0.0021",
      "percentile": "0.11564"
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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 \u0027struct completion\u0027 stored by uea_probe() is then passed to\\nusbatm_usb_disconnect(), which casts it to \u0027struct usbatm_data\u0027 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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/usb/atm/ueagle-atm.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d85f19aaef42a03e3e4765d659c761c8750a7f23\",\"lessThan\":\"9e7312844429379108ea9523a5ed934f142bb177\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"76861031b43a18065d13f9ffb8595d25c7576005\",\"lessThan\":\"f92832262718443feb4e5df2bf70424ba842629e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bbfedc84714064ea4845e6b76f96316eb5bb65d8\",\"lessThan\":\"e814ae925f6f575325124c29dde518b92c822b83\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f2a6abc670104fc3e383ee3b1cf35c070485e3df\",\"lessThan\":\"c035b1198906dd5bd3df9a3045b59254bad1ea7a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c581e30ae5b332d8acef64475a211b3f82099941\",\"lessThan\":\"9904a46401198872ab3de34fd11f383831ef3428\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"509b51327320bdeaef1969248177a446ded073ab\",\"lessThan\":\"d0a57f19fe2865b9747484f5f9c631f944ed9a0f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ddcdac47e1f2651c7be60e299f98faf981522797\",\"lessThan\":\"0cc0c4c14150bb5a16b88dd61368f96cd4caa9ce\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e2674dfbed8a30d57e2bc872c4bfa6c3eec918bf\",\"lessThan\":\"71132cedd1ecbc4032d76e9928c18a10f7e39b80\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/usb/atm/ueagle-atm.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.10.261\",\"lessThan\":\"5.10.265\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.212\",\"lessThan\":\"5.15.216\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.1.178\",\"lessThan\":\"6.1.183\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.6.145\",\"lessThan\":\"6.6.148\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.12.97\",\"lessThan\":\"6.12.101\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.18.40\",\"lessThan\":\"6.18.42\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"7.1.5\",\"lessThan\":\"7.1.6\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0cc0c4c14150bb5a16b88dd61368f96cd4caa9ce\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/71132cedd1ecbc4032d76e9928c18a10f7e39b80\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9904a46401198872ab3de34fd11f383831ef3428\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9e7312844429379108ea9523a5ed934f142bb177\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c035b1198906dd5bd3df9a3045b59254bad1ea7a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d0a57f19fe2865b9747484f5f9c631f944ed9a0f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e814ae925f6f575325124c29dde518b92c822b83\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f92832262718443feb4e5df2bf70424ba842629e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-11T12:29:54+00:00",
      "cve": "CVE-2026-68344",
      "id": "CVE-2026-68344",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "260",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usb: atm: ueagle-atm: reject descriptors that confuse probe and disconnect",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68344.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-11T23:47:04Z",
      "cve": "CVE-2026-68344",
      "id": "CVE-2026-68344",
      "initial_release_date": "2026-08-11T23:47:04Z",
      "product_status:known_not_affected": "296",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68344",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68344.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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