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CVE-2024-46719 (GCVE-0-2024-46719)

Vulnerability from cvelistv5 – Published: 2024-09-18 06:32 – Updated: 2026-05-11 20:35
VLAI
Title
usb: typec: ucsi: Fix null pointer dereference in trace
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: Fix null pointer dereference in trace ucsi_register_altmode checks IS_ERR for the alt pointer and treats NULL as valid. When CONFIG_TYPEC_DP_ALTMODE is not enabled, ucsi_register_displayport returns NULL which causes a NULL pointer dereference in trace. Rather than return NULL, call typec_port_register_altmode to register DisplayPort alternate mode as a non-controllable mode when CONFIG_TYPEC_DP_ALTMODE is not enabled.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-29 14:57 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: af8622f6a585d8d82b11cd7987e082861fd0edd3 , < 8095bf0579ed4906a33f7bec675bfb29b6b16a3b (git)
Affected: af8622f6a585d8d82b11cd7987e082861fd0edd3 , < 7e64cabe81c303bdf6fd26b6a09a3289b33bc870 (git)
Affected: af8622f6a585d8d82b11cd7987e082861fd0edd3 , < 3aa56313b0de06ce1911950b2cc0c269614a87a9 (git)
Affected: af8622f6a585d8d82b11cd7987e082861fd0edd3 , < b4243c05d7e3db0bdbf9124e6fa59b4ca7c807ae (git)
Affected: af8622f6a585d8d82b11cd7987e082861fd0edd3 , < 3b9f2d9301ae67070fe77a0c06758722fd7172b7 (git)
Affected: af8622f6a585d8d82b11cd7987e082861fd0edd3 , < 99331fe68a8eaa4097143a33fb0c12d5e5e8e830 (git)
Affected: af8622f6a585d8d82b11cd7987e082861fd0edd3 , < 99516f76db48e1a9d54cdfed63c1babcee4e71a5 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.2
Unaffected: 0 , < 5.2 (semver)
Unaffected: 5.4.284 , ≤ 5.4.* (semver)
Unaffected: 5.10.226 , ≤ 5.10.* (semver)
Unaffected: 5.15.167 , ≤ 5.15.* (semver)
Unaffected: 6.1.109 , ≤ 6.1.* (semver)
Unaffected: 6.6.50 , ≤ 6.6.* (semver)
Unaffected: 6.10.9 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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Rather than return NULL, call\\ntypec_port_register_altmode to register DisplayPort alternate mode\\nas a non-controllable mode when CONFIG_TYPEC_DP_ALTMODE is not enabled.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: typec: ucsi: Se corrige la desreferencia del puntero nulo en el seguimiento ucsi_register_altmode comprueba IS_ERR para el puntero alt y trata NULL como v\u00e1lido. Cuando CONFIG_TYPEC_DP_ALTMODE no est\u00e1 habilitado, ucsi_register_displayport devuelve NULL, lo que provoca una desreferencia del puntero NULL en el seguimiento. En lugar de devolver NULL, llame a typec_port_register_altmode para registrar el modo alternativo de DisplayPort como un modo no controlable cuando CONFIG_TYPEC_DP_ALTMODE no est\u00e1 habilitado.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/usb/typec/ucsi/ucsi.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"af8622f6a585d8d82b11cd7987e082861fd0edd3\",\"lessThan\":\"8095bf0579ed4906a33f7bec675bfb29b6b16a3b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"af8622f6a585d8d82b11cd7987e082861fd0edd3\",\"lessThan\":\"7e64cabe81c303bdf6fd26b6a09a3289b33bc870\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"af8622f6a585d8d82b11cd7987e082861fd0edd3\",\"lessThan\":\"3aa56313b0de06ce1911950b2cc0c269614a87a9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"af8622f6a585d8d82b11cd7987e082861fd0edd3\",\"lessThan\":\"b4243c05d7e3db0bdbf9124e6fa59b4ca7c807ae\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"af8622f6a585d8d82b11cd7987e082861fd0edd3\",\"lessThan\":\"3b9f2d9301ae67070fe77a0c06758722fd7172b7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"af8622f6a585d8d82b11cd7987e082861fd0edd3\",\"lessThan\":\"99331fe68a8eaa4097143a33fb0c12d5e5e8e830\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"af8622f6a585d8d82b11cd7987e082861fd0edd3\",\"lessThan\":\"99516f76db48e1a9d54cdfed63c1babcee4e71a5\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/usb/typec/ucsi/ucsi.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.2\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.2\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.284\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.226\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.167\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.109\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.50\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.10.9\",\"lessThanOrEqual\":\"6.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.11\",\"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}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-09-29T14:57:21.735008Z\",\"id\":\"CVE-2024-46719\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"5.4.284\",\"matchCriteriaId\":\"B1C17E9C-479F-4AE4-8344-B7A213DE3E83\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.226\",\"matchCriteriaId\":\"864FC17C-501A-4823-A643-6F35D65D8A97\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.167\",\"matchCriteriaId\":\"043405A4-25FE-45D4-A7BB-2A0C3B7D17C1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.109\",\"matchCriteriaId\":\"790F505A-7933-48F1-B038-380A8BC5C153\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.50\",\"matchCriteriaId\":\"A56A0460-B122-44D6-B0E6-26CE9C891536\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.9\",\"matchCriteriaId\":\"F4469C96-A86B-4CC3-B2D5-C21B6B72641B\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3aa56313b0de06ce1911950b2cc0c269614a87a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3b9f2d9301ae67070fe77a0c06758722fd7172b7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7e64cabe81c303bdf6fd26b6a09a3289b33bc870\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8095bf0579ed4906a33f7bec675bfb29b6b16a3b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/99331fe68a8eaa4097143a33fb0c12d5e5e8e830\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/99516f76db48e1a9d54cdfed63c1babcee4e71a5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b4243c05d7e3db0bdbf9124e6fa59b4ca7c807ae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-13T09:11:17+00:00",
      "cve": "CVE-2024-46719",
      "id": "CVE-2024-46719",
      "initial_release_date": "2024-09-18T00:00:00+00:00",
      "product_status:known_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usb: typec: ucsi: Fix null pointer dereference in trace",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-46719.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-03T00:21:36Z",
      "cve": "CVE-2024-46719",
      "id": "CVE-2024-46719",
      "initial_release_date": "2024-09-19T03:11:09Z",
      "product_status:known_affected": "369",
      "product_status:known_not_affected": "501",
      "product_status:recommended": "623",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-46719",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-46719.json",
      "version": "67"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T22:16:52.599Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-46719\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-29T14:57:21.735008Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-29T14:57:25.758Z\"}}], \"cna\": {\"title\": \"usb: typec: ucsi: Fix null pointer dereference in trace\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"af8622f6a585d8d82b11cd7987e082861fd0edd3\", \"lessThan\": \"8095bf0579ed4906a33f7bec675bfb29b6b16a3b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"af8622f6a585d8d82b11cd7987e082861fd0edd3\", \"lessThan\": \"7e64cabe81c303bdf6fd26b6a09a3289b33bc870\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"af8622f6a585d8d82b11cd7987e082861fd0edd3\", \"lessThan\": \"3aa56313b0de06ce1911950b2cc0c269614a87a9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"af8622f6a585d8d82b11cd7987e082861fd0edd3\", \"lessThan\": \"b4243c05d7e3db0bdbf9124e6fa59b4ca7c807ae\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"af8622f6a585d8d82b11cd7987e082861fd0edd3\", \"lessThan\": \"3b9f2d9301ae67070fe77a0c06758722fd7172b7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"af8622f6a585d8d82b11cd7987e082861fd0edd3\", \"lessThan\": \"99331fe68a8eaa4097143a33fb0c12d5e5e8e830\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"af8622f6a585d8d82b11cd7987e082861fd0edd3\", \"lessThan\": \"99516f76db48e1a9d54cdfed63c1babcee4e71a5\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/usb/typec/ucsi/ucsi.h\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.2\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.2\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.284\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.226\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.167\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.109\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.50\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/usb/typec/ucsi/ucsi.h\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/8095bf0579ed4906a33f7bec675bfb29b6b16a3b\"}, {\"url\": \"https://git.kernel.org/stable/c/7e64cabe81c303bdf6fd26b6a09a3289b33bc870\"}, {\"url\": \"https://git.kernel.org/stable/c/3aa56313b0de06ce1911950b2cc0c269614a87a9\"}, {\"url\": \"https://git.kernel.org/stable/c/b4243c05d7e3db0bdbf9124e6fa59b4ca7c807ae\"}, {\"url\": \"https://git.kernel.org/stable/c/3b9f2d9301ae67070fe77a0c06758722fd7172b7\"}, {\"url\": \"https://git.kernel.org/stable/c/99331fe68a8eaa4097143a33fb0c12d5e5e8e830\"}, {\"url\": \"https://git.kernel.org/stable/c/99516f76db48e1a9d54cdfed63c1babcee4e71a5\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: typec: ucsi: Fix null pointer dereference in trace\\n\\nucsi_register_altmode checks IS_ERR for the alt pointer and treats\\nNULL as valid. When CONFIG_TYPEC_DP_ALTMODE is not enabled,\\nucsi_register_displayport returns NULL which causes a NULL pointer\\ndereference in trace. Rather than return NULL, call\\ntypec_port_register_altmode to register DisplayPort alternate mode\\nas a non-controllable mode when CONFIG_TYPEC_DP_ALTMODE is not enabled.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.284\", \"versionStartIncluding\": \"5.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.226\", \"versionStartIncluding\": \"5.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.167\", \"versionStartIncluding\": \"5.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.109\", \"versionStartIncluding\": \"5.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.50\", \"versionStartIncluding\": \"5.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.9\", \"versionStartIncluding\": \"5.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11\", \"versionStartIncluding\": \"5.2\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:52:54.042Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-46719\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-05T10:52:54.042Z\", \"dateReserved\": \"2024-09-11T15:12:18.255Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-09-18T06:32:18.028Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

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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.