CVE-2026-46151 (GCVE-0-2026-46151)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-06-14 17:58
VLAI
Title
usb: usblp: fix heap leak in IEEE 1284 device ID via short response
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: usblp: fix heap leak in IEEE 1284 device ID via short response usblp_ctrl_msg() collapses the usb_control_msg() return value to 0/-errno, discarding the actual number of bytes transferred. A broken printer can complete the GET_DEVICE_ID control transfer short and the driver has no way to know. usblp_cache_device_id_string() reads the 2-byte big-endian length prefix from the response and trusts it (clamped only to the buffer bounds). The buffer is kmalloc(1024) at probe time. A device that sends exactly two bytes (e.g. 0x03 0xFF, claiming a 1023-byte ID) leaves device_id_string[2..1022] holding stale kmalloc heap. That stale data is then exposed: - via the ieee1284_id sysfs attribute (sprintf("%s", buf+2), truncated at the first NUL in the stale heap), and - via the IOCNR_GET_DEVICE_ID ioctl, which copy_to_user()s the full claimed length regardless of NULs, up to 1021 bytes of uninitialized heap, with the leak size chosen by the device. Fix this up by just zapping the buffer with zeros before each request sent to the device.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4650cce898fcd0bb8c33e529984687a8caed10c3 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 612640abbd9e0947fe8f37aaf0cf324265d7caa4 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4220d4dd062ea3d3eb056a6cbe0b568e740d20b1 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6e29c32a27218f2dcd4a4e9b0b3c5e7728640698 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6d8142141c942c0d8e79343cffda9c44bb1f3f4f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8247f52d822180e94ccbfdab91613af386a4e34d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 522d17e93a85575256894212d10e5a1fa6f36529 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7a400c6fe3617e31e690e3f7ca37bb335e0498f3 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.88 , ≤ 6.12.* (semver)
Unaffected: 6.18.30 , ≤ 6.18.* (semver)
Unaffected: 7.0.7 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: usblp: fix heap leak in IEEE 1284 device ID via short response\n\nusblp_ctrl_msg() collapses the usb_control_msg() return value to\n0/-errno, discarding the actual number of bytes transferred.  A broken\nprinter can complete the GET_DEVICE_ID control transfer short and the\ndriver has no way to know.\n\nusblp_cache_device_id_string() reads the 2-byte big-endian length prefix\nfrom the response and trusts it (clamped only to the buffer bounds).\nThe buffer is kmalloc(1024) at probe time. A device that sends exactly\ntwo bytes (e.g. 0x03 0xFF, claiming a 1023-byte ID) leaves\ndevice_id_string[2..1022] holding stale kmalloc heap.\n\nThat stale data is then exposed:\n  - via the ieee1284_id sysfs attribute (sprintf(\"%s\", buf+2), truncated\n    at the first NUL in the stale heap), and\n  - via the IOCNR_GET_DEVICE_ID ioctl, which copy_to_user()s the full\n    claimed length regardless of NULs, up to 1021 bytes of uninitialized\n    heap, with the leak size chosen by the device.\n\nFix this up by just zapping the buffer with zeros before each request\nsent to the device."
        }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/4650cce898fcd0bb8c33e529984687a8caed10c3"
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          "url": "https://git.kernel.org/stable/c/612640abbd9e0947fe8f37aaf0cf324265d7caa4"
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        {
          "url": "https://git.kernel.org/stable/c/7a400c6fe3617e31e690e3f7ca37bb335e0498f3"
        }
      ],
      "title": "usb: usblp: fix heap leak in IEEE 1284 device ID via short response",
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        "engine": "bippy-1.2.0"
      }
    }
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    "dateReserved": "2026-05-13T15:03:33.101Z",
    "dateUpdated": "2026-06-14T17:58:20.398Z",
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      "title": "usb: usblp: fix heap leak in IEEE 1284 device ID via short response",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46151.json",
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A device that sends exactly\\ntwo bytes (e.g. 0x03 0xFF, claiming a 1023-byte ID) leaves\\ndevice_id_string[2..1022] holding stale kmalloc heap.\\n\\nThat stale data is then exposed:\\n  - via the ieee1284_id sysfs attribute (sprintf(\\\"%s\\\", buf+2), truncated\\n    at the first NUL in the stale heap), and\\n  - via the IOCNR_GET_DEVICE_ID ioctl, which copy_to_user()s the full\\n    claimed length regardless of NULs, up to 1021 bytes of uninitialized\\n    heap, with the leak size chosen by the device.\\n\\nFix this up by just zapping the buffer with zeros before each request\\nsent to the device.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/usb/class/usblp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"4650cce898fcd0bb8c33e529984687a8caed10c3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"612640abbd9e0947fe8f37aaf0cf324265d7caa4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"4220d4dd062ea3d3eb056a6cbe0b568e740d20b1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"6e29c32a27218f2dcd4a4e9b0b3c5e7728640698\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"6d8142141c942c0d8e79343cffda9c44bb1f3f4f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"8247f52d822180e94ccbfdab91613af386a4e34d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"522d17e93a85575256894212d10e5a1fa6f36529\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"7a400c6fe3617e31e690e3f7ca37bb335e0498f3\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/usb/class/usblp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.258\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.140\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.88\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.30\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.7\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.12.1\",\"versionEndExcluding\":\"5.10.258\",\"matchCriteriaId\":\"E03287AA-1109-4662-85B8-5E824B2EA646\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.209\",\"matchCriteriaId\":\"919C10A9-7951-4A74-BADD-C135A0A8D8B4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.175\",\"matchCriteriaId\":\"92385813-D91D-480D-83A1-F423D2CBB2BA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.140\",\"matchCriteriaId\":\"A1A92866-F406-43B5-B2D1-CFC274753E9D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.88\",\"matchCriteriaId\":\"5AFBE0EC-CCDF-4207-AE92-ABF958125CA4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.30\",\"matchCriteriaId\":\"BF39AE08-AE6D-4410-8FBE-76F6BF5BF55B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:41:07+00:00",
      "cve": "CVE-2026-46151",
      "id": "CVE-2026-46151",
      "initial_release_date": "2026-05-28T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usb: usblp: fix heap leak in IEEE 1284 device ID via short response",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46151.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-21T23:54:54Z",
      "cve": "CVE-2026-46151",
      "id": "CVE-2026-46151",
      "initial_release_date": "2026-05-29T01:16:13Z",
      "product_status:known_affected": "175",
      "product_status:known_not_affected": "31",
      "product_status:recommended": "102",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46151",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46151.json",
      "version": "8"
    }
  }
}



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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

Author Source Type Date Other

Nomenclature

  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.