CVE-2026-98752 (GCVE-0-2026-98752)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:47 – Updated: 2026-10-30 12:39
VLAI
Title
tty: port: fix tty_port_tty_vhangup() race
Summary
In the Linux kernel, the following vulnerability has been resolved: tty: port: fix tty_port_tty_vhangup() race Drivers rely on tty_port_tty_vhangup() to synchronously hang up their ports before tearing down resources as part of deregistration (e.g. on physical disconnect). If tty_port_tty_vhangup() races with another hangup it may however return before the port has been shut down. This is in turn can lead to use-after-free and NULL-pointer dereferences in racing ioctls (including a synchronous hangup) and in processing of racing asynchronous hangups (carrier loss). Add the missing serialisation to tty_port_tty_vhangup() and tty_port_hangup() so that the former does not return until the port has been shut down also when there is a racing hangup. Note that serial core does not use tty_port_hangup(), but it already holds the port mutex when clearing port->tty and shutting down the port in uart_hangup().
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e , < a78910f6d78cc1415cbc9b4fb621c3f4f6945be2 (git)
Affected: 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e , < 2e16ae1464a4f435425c6f6ff1e293db850a624c (git)
Affected: 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e , < a776d603d1e1bba2837295817b0a39394707b10d (git)
Affected: 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e , < ce220b4cdf62f73db0c1940f968eb33b9899fdd0 (git)
Affected: 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e , < 6d1a984afc3ca477dab3e51ec806671d443ad524 (git)
Affected: 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e , < 6b7be3b9b857947e9c1338d4919d4ebd3b75e907 (git)
Affected: 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e , < 017b18addbe8dcace1a569a00d40ed1ba1e03f4c (git)
Affected: 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e , < b48820de8c1a596c5b99775524dfce73c6576c5d (git)
Affected: 4260dc792fabfd20c8644fa9414b2ae48372365f (git)
Affected: 2.6.31.2 , < 2.6.32 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.32
Unaffected: 0 , < 2.6.32 (semver)
Unaffected: 5.10.273 , ≤ 5.10.* (semver)
Unaffected: 5.15.224 , ≤ 5.15.* (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.56 , ≤ 6.18.* (semver)
Unaffected: 7.2.10 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/tty_port.c",
            "include/linux/tty_port.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a78910f6d78cc1415cbc9b4fb621c3f4f6945be2",
              "status": "affected",
              "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
              "versionType": "git"
            },
            {
              "lessThan": "2e16ae1464a4f435425c6f6ff1e293db850a624c",
              "status": "affected",
              "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
              "versionType": "git"
            },
            {
              "lessThan": "a776d603d1e1bba2837295817b0a39394707b10d",
              "status": "affected",
              "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
              "versionType": "git"
            },
            {
              "lessThan": "ce220b4cdf62f73db0c1940f968eb33b9899fdd0",
              "status": "affected",
              "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
              "versionType": "git"
            },
            {
              "lessThan": "6d1a984afc3ca477dab3e51ec806671d443ad524",
              "status": "affected",
              "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
              "versionType": "git"
            },
            {
              "lessThan": "6b7be3b9b857947e9c1338d4919d4ebd3b75e907",
              "status": "affected",
              "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
              "versionType": "git"
            },
            {
              "lessThan": "017b18addbe8dcace1a569a00d40ed1ba1e03f4c",
              "status": "affected",
              "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
              "versionType": "git"
            },
            {
              "lessThan": "b48820de8c1a596c5b99775524dfce73c6576c5d",
              "status": "affected",
              "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4260dc792fabfd20c8644fa9414b2ae48372365f",
              "versionType": "git"
            },
            {
              "lessThan": "2.6.32",
              "status": "affected",
              "version": "2.6.31.2",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/tty_port.c",
            "include/linux/tty_port.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.32"
            },
            {
              "lessThan": "2.6.32",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.273",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.224",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.273",
                  "versionStartIncluding": "2.6.32",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.224",
                  "versionStartIncluding": "2.6.32",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.191",
                  "versionStartIncluding": "2.6.32",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.160",
                  "versionStartIncluding": "2.6.32",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.113",
                  "versionStartIncluding": "2.6.32",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.56",
                  "versionStartIncluding": "2.6.32",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.10",
                  "versionStartIncluding": "2.6.32",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "2.6.32",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "2.6.31.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: port: fix tty_port_tty_vhangup() race\n\nDrivers rely on tty_port_tty_vhangup() to synchronously hang up their\nports before tearing down resources as part of deregistration (e.g. on\nphysical disconnect).\n\nIf tty_port_tty_vhangup() races with another hangup it may however\nreturn before the port has been shut down. This is in turn can lead to\nuse-after-free and NULL-pointer dereferences in racing ioctls (including\na synchronous hangup) and in processing of racing asynchronous hangups\n(carrier loss).\n\nAdd the missing serialisation to tty_port_tty_vhangup() and\ntty_port_hangup() so that the former does not return until the port has\nbeen shut down also when there is a racing hangup.\n\nNote that serial core does not use tty_port_hangup(), but it already\nholds the port mutex when clearing port-\u003etty and shutting down the port\nin uart_hangup()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:39:22.635Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a78910f6d78cc1415cbc9b4fb621c3f4f6945be2"
        },
        {
          "url": "https://git.kernel.org/stable/c/2e16ae1464a4f435425c6f6ff1e293db850a624c"
        },
        {
          "url": "https://git.kernel.org/stable/c/a776d603d1e1bba2837295817b0a39394707b10d"
        },
        {
          "url": "https://git.kernel.org/stable/c/ce220b4cdf62f73db0c1940f968eb33b9899fdd0"
        },
        {
          "url": "https://git.kernel.org/stable/c/6d1a984afc3ca477dab3e51ec806671d443ad524"
        },
        {
          "url": "https://git.kernel.org/stable/c/6b7be3b9b857947e9c1338d4919d4ebd3b75e907"
        },
        {
          "url": "https://git.kernel.org/stable/c/017b18addbe8dcace1a569a00d40ed1ba1e03f4c"
        },
        {
          "url": "https://git.kernel.org/stable/c/b48820de8c1a596c5b99775524dfce73c6576c5d"
        }
      ],
      "title": "tty: port: fix tty_port_tty_vhangup() race",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98752",
    "datePublished": "2026-10-18T15:47:36.877Z",
    "dateReserved": "2026-09-25T10:25:14.368Z",
    "dateUpdated": "2026-10-30T12:39:22.635Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-98752",
      "date": "2026-11-01",
      "epss": "0.00176",
      "percentile": "0.07151"
    },
    "microsoft_vex": {
      "current_release_date": "2026-10-21T18:42:45.000Z",
      "cve": "CVE-2026-98752",
      "id": "msrc_CVE-2026-98752",
      "initial_release_date": "2026-10-20T01:02:01.000Z",
      "product_status:known_affected": "1",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "tty: port: fix tty_port_tty_vhangup() race",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98752.json",
      "version": "3"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/tty/tty_port.c",
                  "include/linux/tty_port.h"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "a78910f6d78cc1415cbc9b4fb621c3f4f6945be2",
                    "status": "affected",
                    "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "2e16ae1464a4f435425c6f6ff1e293db850a624c",
                    "status": "affected",
                    "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "a776d603d1e1bba2837295817b0a39394707b10d",
                    "status": "affected",
                    "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "ce220b4cdf62f73db0c1940f968eb33b9899fdd0",
                    "status": "affected",
                    "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "6d1a984afc3ca477dab3e51ec806671d443ad524",
                    "status": "affected",
                    "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "6b7be3b9b857947e9c1338d4919d4ebd3b75e907",
                    "status": "affected",
                    "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "017b18addbe8dcace1a569a00d40ed1ba1e03f4c",
                    "status": "affected",
                    "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "b48820de8c1a596c5b99775524dfce73c6576c5d",
                    "status": "affected",
                    "version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "4260dc792fabfd20c8644fa9414b2ae48372365f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "2.6.32",
                    "status": "affected",
                    "version": "2.6.31.2",
                    "versionType": "semver"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/tty/tty_port.c",
                  "include/linux/tty_port.h"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "2.6.32"
                  },
                  {
                    "lessThan": "2.6.32",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.273",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.224",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.191",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.160",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.113",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.56",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.10",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.3",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: port: fix tty_port_tty_vhangup() race\n\nDrivers rely on tty_port_tty_vhangup() to synchronously hang up their\nports before tearing down resources as part of deregistration (e.g. on\nphysical disconnect).\n\nIf tty_port_tty_vhangup() races with another hangup it may however\nreturn before the port has been shut down. This is in turn can lead to\nuse-after-free and NULL-pointer dereferences in racing ioctls (including\na synchronous hangup) and in processing of racing asynchronous hangups\n(carrier loss).\n\nAdd the missing serialisation to tty_port_tty_vhangup() and\ntty_port_hangup() so that the former does not return until the port has\nbeen shut down also when there is a racing hangup.\n\nNote that serial core does not use tty_port_hangup(), but it already\nholds the port mutex when clearing port-\u003etty and shutting down the port\nin uart_hangup()."
          }
        ],
        "id": "CVE-2026-98752",
        "lastModified": "2026-10-30T13:21:24.107",
        "metrics": {},
        "published": "2026-10-18T16:17:28.993",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/017b18addbe8dcace1a569a00d40ed1ba1e03f4c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/2e16ae1464a4f435425c6f6ff1e293db850a624c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/6b7be3b9b857947e9c1338d4919d4ebd3b75e907"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/6d1a984afc3ca477dab3e51ec806671d443ad524"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/a776d603d1e1bba2837295817b0a39394707b10d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/a78910f6d78cc1415cbc9b4fb621c3f4f6945be2"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/b48820de8c1a596c5b99775524dfce73c6576c5d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/ce220b4cdf62f73db0c1940f968eb33b9899fdd0"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-23T03:43:05+00:00",
      "cve": "CVE-2026-98752",
      "id": "CVE-2026-98752",
      "initial_release_date": "2026-10-18T00:00:00+00:00",
      "product_status:known_affected": "264",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tty: port: fix tty_port_tty_vhangup() race",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98752.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-19T23:48:06Z",
      "cve": "CVE-2026-98752",
      "id": "CVE-2026-98752",
      "initial_release_date": "2026-10-19T23:48:06Z",
      "product_status:known_affected": "158",
      "product_status:known_not_affected": "190",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-98752",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-98752.json",
      "version": "2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Loading timeline…




    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.