CVE-2026-45923

CVEs › CVE-2026-45923

Description

In the Linux kernel, the following vulnerability has been resolved: net: usb: catc: enable basic endpoint checking catc_probe() fills three URBs with hardcoded endpoint pipes without verifying the endpoint descriptors: - usb_sndbulkpipe(usbdev, 1) and usb_rcvbulkpipe(usbdev, 1) for TX/RX - usb_rcvintpipe(usbdev, 2) for interrupt status A malformed USB device can present these endpoints with transfer types that differ from what the driver assumes. Add a catc_usb_ep enum for endpoint numbers, replacing magic constants throughout. Add usb_check_bulk_endpoints() and usb_check_int_endpoints() calls after usb_set_interface() to verify endpoint types before use, rejecting devices with mismatched descriptors at probe time. Similar to - commit 90b7f2961798 ("net: usb: rtl8150: enable basic endpoint checking") which fixed the issue in rtl8150.

Overview

State: PUBLISHED
Assigner (CNA): Linux
CVSS severity: high
CVSS score: 8.4 / 10
CVSS vector: AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Effective score: 8.4 / 10 HIGH source: CNA overview
CWE(s): —
Reserved: 2026-05-13
Published: 2026-05-27 12:17 UTC
Last updated: 2026-05-27 12:17 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/45xxx/CVE-2026-45923.json
Linked Threat: CVE-2026-45923 — CVE-2026-45923

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-05-27 14:17:07 UTC
NVD last modified: 2026-06-24 17:21:45 UTC
NVD CVSS v3.1: 5.5 / 10 MEDIUM source: nvd@nist.gov
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Exploitability subscore: 1.8 / 10
Impact subscore: 3.6 / 10
EPSS score: 0.0016 (probability of exploitation in next 30 days)
EPSS percentile: 5.57% vs all CVEs — higher = more likely to be exploited, as of 2026-07-17

NVD / KEV / EPSS data refreshed 2026-07-17 15:15 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-32389
Assigner: Linux
Published: May 27, 2026, 12:17:42 PM
Updated: May 27, 2026, 12:17:42 PM
EUVD base score: 0.0 / 10
EUVD-reported EPSS: 0.1600
Vendors: Linux
Products: Linux (patch: 5.10.252)

Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <36c28b028efba0f42218d41fed12c47ce217c1f1)

Linux (2.6.12)

Linux (patch: 6.1.165)

Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9e7021d2aeae57c323a6f722ed7915686cdcc123)

Linux (patch: 6.6.128)

Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a488001a8197da4f9c413eec8f6acbff71c60145)

Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <163d04897e57633c5d2e69734e4e4b22bb63f50d)

Linux (patch: 7.0)

Linux (patch: 6.19.4)

Linux (patch: 6.18.14)

Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <eade522d3e6ac3f3bfb51bfa5b5b4b32bd0b846f)

Linux (patch: 6.12.75)

Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ac7739b78ded519e1d9919a814da3b34120bec8c)

Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1a42cfced8900d33d032c7ec338484855b61b8cc)

Linux (patch: 0)
Aliases: GHSA-f555-jxrw-hv6g

ENISA description: In the Linux kernel, the following vulnerability has been resolved: net: usb: catc: enable basic endpoint checking catc_probe() fills three URBs with hardcoded endpoint pipes without verifying the endpoint descriptors: - usb_sndbulkpipe(usbdev, 1) and usb_rcvbulkpipe(usbdev, 1) for TX/RX - usb_rcvintpipe(usbdev, 2) for interrupt status A malformed USB device can present these endpoints with transfer types that differ from what the driver assumes. Add a catc_usb_ep enum for endpoint numbers, replacing magic constants throughout. Add usb_check_bulk_endpoints() and usb_check_int_endpoints() calls after usb_set_interface() to verify endpoint types before use, rejecting devices with mismatched descriptors at probe time. Similar to - commit 90b7f2961798 ("net: usb: rtl8150: enable basic endpoint checking") which fixed the issue in rtl8150.

EUVD references (7)

Affected products (2)

Vendor	Product	Versions	Platforms
Linux	Linux	`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2` (affected), `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2` (affected), `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2` (affected), `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2` (affected), `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2` (affected), `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2` (affected), `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2` (affected)	—
Linux	Linux	`2.6.12` (affected), `0` (unaffected), `5.10.252` (unaffected), `6.1.165` (unaffected), `6.6.128` (unaffected), `6.12.75` (unaffected), `6.18.14` (unaffected), `6.19.4` (unaffected), `7.0` (unaffected)	—

Affected products — CPE 2.3 (6) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*

Vendor references (7)

References embedded in the original CVE record by the assigning CNA.

Web references (10)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

https://git.kernel.org/stable/c/163d04897e57633c5d2e69734e4e4b22bb63f50d tenable:git.kernel.org
https://git.kernel.org/stable/c/1a42cfced8900d33d032c7ec338484855b61b8cc tenable:git.kernel.org
https://git.kernel.org/stable/c/36c28b028efba0f42218d41fed12c47ce217c1f1 tenable:git.kernel.org
https://git.kernel.org/stable/c/9e7021d2aeae57c323a6f722ed7915686cdcc123 tenable:git.kernel.org
https://git.kernel.org/stable/c/a488001a8197da4f9c413eec8f6acbff71c60145 tenable:git.kernel.org
https://git.kernel.org/stable/c/ac7739b78ded519e1d9919a814da3b34120bec8c tenable:git.kernel.org
https://git.kernel.org/stable/c/eade522d3e6ac3f3bfb51bfa5b5b4b32bd0b846f tenable:git.kernel.org
https://nvd.nist.gov/vuln/detail/CVE-2026-45923 tenable:nvd.nist.gov
https://www.cve.org/CVERecord?id=CVE-2026-45923 tenable:www.cve.org
https://www.first.org/epss/ tenable:www.first.org

NVD-tagged references (7)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://git.kernel.org/stable/c/163d04897e57633c5d2e69734e4e4b22bb63f50d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/1a42cfced8900d33d032c7ec338484855b61b8cc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/36c28b028efba0f42218d41fed12c47ce217c1f1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/9e7021d2aeae57c323a6f722ed7915686cdcc123 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/a488001a8197da4f9c413eec8f6acbff71c60145 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/ac7739b78ded519e1d9919a814da3b34120bec8c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/eade522d3e6ac3f3bfb51bfa5b5b4b32bd0b846f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch

Remediations (17)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

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The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

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Nvd - Cve-2026-20923

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An official website of the United States government NVD MENU

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AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-45923.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/usb/catc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "eade522d3e6ac3f3bfb51bfa5b5b4b32bd0b846f",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "ac7739b78ded519e1d9919a814da3b34120bec8c",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "163d04897e57633c5d2e69734e4e4b22bb63f50d",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "a488001a8197da4f9c413eec8f6acbff71c60145",
              "status": "affected",
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              "versionType": "git"
            },
            {
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              "versionType": "git"
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            {
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              "versionType": "git"
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            {
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              "versionType": "git"
            }
          ]
        },
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            "drivers/net/usb/catc.c"
          ],
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          "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": "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": "6.18.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "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": "6.18.14",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.4",
                  "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: catc: enable basic endpoint checking\n\ncatc_probe() fills three URBs with hardcoded endpoint pipes without\nverifying the endpoint descriptors:\n\n  - usb_sndbulkpipe(usbdev, 1) and usb_rcvbulkpipe(usbdev, 1) for TX/RX\n  - usb_rcvintpipe(usbdev, 2) for interrupt status\n\nA malformed USB device can present these endpoints with transfer types\nthat differ from what the driver assumes.\n\nAdd a catc_usb_ep enum for endpoint numbers, replacing magic constants\nthroughout. Add usb_check_bulk_endpoints() and usb_check_int_endpoints()\ncalls after usb_set_interface() to verify endpoint types before use,\nrejecting devices with mismatched descriptors at probe time.\n\nSimilar to\n- commit 90b7f2961798 (\"net: usb: rtl8150: enable basic endpoint checking\")\nwhich fixed the issue in rtl8150."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:17:42.312Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/eade522d3e6ac3f3bfb51bfa5b5b4b32bd0b846f"
        },
        {
          "url": "https://git.kernel.org/stable/c/ac7739b78ded519e1d9919a814da3b34120bec8c"
        },
        {
          "url": "https://git.kernel.org/stable/c/163d04897e57633c5d2e69734e4e4b22bb63f50d"
        },
        {
          "url": "https://git.kernel.org/stable/c/a488001a8197da4f9c413eec8f6acbff71c60145"
        },
        {
          "url": "https://git.kernel.org/stable/c/36c28b028efba0f42218d41fed12c47ce217c1f1"
        },
        {
          "url": "https://git.kernel.org/stable/c/1a42cfced8900d33d032c7ec338484855b61b8cc"
        },
        {
          "url": "https://git.kernel.org/stable/c/9e7021d2aeae57c323a6f722ed7915686cdcc123"
        }
      ],
      "title": "net: usb: catc: enable basic endpoint checking",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45923",
    "datePublished": "2026-05-27T12:17:42.312Z",
    "dateReserved": "2026-05-13T15:03:33.085Z",
    "dateUpdated": "2026-05-27T12:17:42.312Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}