CVE-2026-43156 (GCVE-0-2026-43156)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:27 – Updated: 2026-05-06 11:27
VLAI?
Title
net: usb: pegasus: enable basic endpoint checking
Summary
In the Linux kernel, the following vulnerability has been resolved: net: usb: pegasus: enable basic endpoint checking pegasus_probe() fills URBs with hardcoded endpoint pipes without verifying the endpoint descriptors: - usb_rcvbulkpipe(dev, 1) for RX data - usb_sndbulkpipe(dev, 2) for TX data - usb_rcvintpipe(dev, 3) for status interrupts A malformed USB device can present these endpoints with transfer types that differ from what the driver assumes. Add a pegasus_usb_ep enum for endpoint numbers, replacing magic constants throughout. Add usb_check_bulk_endpoints() and usb_check_int_endpoints() calls before any resource allocation to verify endpoint types before use, rejecting devices with mismatched descriptors at probe time, and avoid triggering assertion. Similar fix to - commit 90b7f2961798 ("net: usb: rtl8150: enable basic endpoint checking") - commit 9e7021d2aeae ("net: usb: catc: enable basic endpoint checking")
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a3e64e950a3981a8199de9798f6d21261b959171 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 229dc9b9db475ac900182bafe258943e0e054c6d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 26b3ec62fa1a94ac801feca47f040fc729b3c174 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 35854ed5c40b02f95824e44398f9d2ba33727203 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 67ba6b13dbcaf45681fb6758794c5ac5fa589a6c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d2e7c898cc02dfe42443489a67a45ed616cb76e9 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2705709f6574a088aab246af72fc95f2fea51484 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3d7e6ce34f4fcc7083510c28b17a7c36462a25d4 (git)
Create a notification for this product.
    Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/usb/pegasus.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a3e64e950a3981a8199de9798f6d21261b959171",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "229dc9b9db475ac900182bafe258943e0e054c6d",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "26b3ec62fa1a94ac801feca47f040fc729b3c174",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "35854ed5c40b02f95824e44398f9d2ba33727203",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "67ba6b13dbcaf45681fb6758794c5ac5fa589a6c",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "d2e7c898cc02dfe42443489a67a45ed616cb76e9",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "2705709f6574a088aab246af72fc95f2fea51484",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "3d7e6ce34f4fcc7083510c28b17a7c36462a25d4",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/usb/pegasus.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.252",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.252",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.202",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.165",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.128",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.16",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: pegasus: enable basic endpoint checking\n\npegasus_probe() fills URBs with hardcoded endpoint pipes without\nverifying the endpoint descriptors:\n\n  - usb_rcvbulkpipe(dev, 1) for RX data\n  - usb_sndbulkpipe(dev, 2) for TX data\n  - usb_rcvintpipe(dev, 3)  for status interrupts\n\nA malformed USB device can present these endpoints with transfer types\nthat differ from what the driver assumes.\n\nAdd a pegasus_usb_ep enum for endpoint numbers, replacing magic\nconstants throughout. Add usb_check_bulk_endpoints() and\nusb_check_int_endpoints() calls before any resource allocation to\nverify endpoint types before use, rejecting devices with mismatched\ndescriptors at probe time, and avoid triggering assertion.\n\nSimilar fix to\n- commit 90b7f2961798 (\"net: usb: rtl8150: enable basic endpoint checking\")\n- commit 9e7021d2aeae (\"net: usb: catc: enable basic endpoint checking\")"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-06T11:27:36.491Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a3e64e950a3981a8199de9798f6d21261b959171"
        },
        {
          "url": "https://git.kernel.org/stable/c/229dc9b9db475ac900182bafe258943e0e054c6d"
        },
        {
          "url": "https://git.kernel.org/stable/c/26b3ec62fa1a94ac801feca47f040fc729b3c174"
        },
        {
          "url": "https://git.kernel.org/stable/c/35854ed5c40b02f95824e44398f9d2ba33727203"
        },
        {
          "url": "https://git.kernel.org/stable/c/67ba6b13dbcaf45681fb6758794c5ac5fa589a6c"
        },
        {
          "url": "https://git.kernel.org/stable/c/d2e7c898cc02dfe42443489a67a45ed616cb76e9"
        },
        {
          "url": "https://git.kernel.org/stable/c/2705709f6574a088aab246af72fc95f2fea51484"
        },
        {
          "url": "https://git.kernel.org/stable/c/3d7e6ce34f4fcc7083510c28b17a7c36462a25d4"
        }
      ],
      "title": "net: usb: pegasus: enable basic endpoint checking",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43156",
    "datePublished": "2026-05-06T11:27:36.491Z",
    "dateReserved": "2026-05-01T14:12:55.989Z",
    "dateUpdated": "2026-05-06T11:27:36.491Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-43156",
      "date": "2026-05-08",
      "epss": "0.00024",
      "percentile": "0.06984"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-43156\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-06T12:16:33.427\",\"lastModified\":\"2026-05-06T13:07:51.607\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: usb: pegasus: enable basic endpoint checking\\n\\npegasus_probe() fills URBs with hardcoded endpoint pipes without\\nverifying the endpoint descriptors:\\n\\n  - usb_rcvbulkpipe(dev, 1) for RX data\\n  - usb_sndbulkpipe(dev, 2) for TX data\\n  - usb_rcvintpipe(dev, 3)  for status interrupts\\n\\nA malformed USB device can present these endpoints with transfer types\\nthat differ from what the driver assumes.\\n\\nAdd a pegasus_usb_ep enum for endpoint numbers, replacing magic\\nconstants throughout. Add usb_check_bulk_endpoints() and\\nusb_check_int_endpoints() calls before any resource allocation to\\nverify endpoint types before use, rejecting devices with mismatched\\ndescriptors at probe time, and avoid triggering assertion.\\n\\nSimilar fix to\\n- commit 90b7f2961798 (\\\"net: usb: rtl8150: enable basic endpoint checking\\\")\\n- commit 9e7021d2aeae (\\\"net: usb: catc: enable basic endpoint checking\\\")\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/229dc9b9db475ac900182bafe258943e0e054c6d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/26b3ec62fa1a94ac801feca47f040fc729b3c174\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2705709f6574a088aab246af72fc95f2fea51484\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/35854ed5c40b02f95824e44398f9d2ba33727203\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3d7e6ce34f4fcc7083510c28b17a7c36462a25d4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/67ba6b13dbcaf45681fb6758794c5ac5fa589a6c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a3e64e950a3981a8199de9798f6d21261b959171\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d2e7c898cc02dfe42443489a67a45ed616cb76e9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.