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

Vulnerability from cvelistv5 – Published: 2026-05-06 11:27 – Updated: 2026-05-11 22:18
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
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 CPE status
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)
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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)
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-03T14:57:47+00:00",
      "cve": "CVE-2026-43156",
      "id": "CVE-2026-43156",
      "initial_release_date": "2026-05-06T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: usb: pegasus: enable basic endpoint checking",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43156.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-16T00:14:10Z",
      "cve": "CVE-2026-43156",
      "id": "CVE-2026-43156",
      "initial_release_date": "2026-05-07T02:17:35Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "647",
      "product_status:known_not_affected": "17",
      "product_status:recommended": "287",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43156",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43156.json",
      "version": "12"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.