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CVE-2021-29985 (GCVE-0-2021-29985)

Vulnerability from cvelistv5 – Published: 2021-08-17 19:12 – Updated: 2024-08-03 22:24
VLAI
Summary
A use-after-free vulnerability in media channels could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • Use-after-free media channels
Assigner
References
Impacted products
Vendor Product Version CPE status
Mozilla Thunderbird Affected: unspecified , < 78.13 (custom)
Affected: unspecified , < 91 (custom)
guessed Create a notification for this product.
Mozilla Firefox ESR Affected: unspecified , < 78.13 (custom)
guessed Create a notification for this product.
Mozilla Firefox Affected: unspecified , < 91 (custom)
guessed Create a notification for this product.
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    "redhat_vex": {
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      "current_release_date": "2025-11-21T16:14:12+00:00",
      "cve": "CVE-2021-29985",
      "id": "CVE-2021-29985",
      "initial_release_date": "2021-08-10T00:00:00+00:00",
      "product_status:fixed": "144",
      "product_status:known_affected": "4",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Mozilla: Use-after-free media channels",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-29985.json",
      "version": "3"
    },
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      "current_release_date": "2026-08-31T02:05:10Z",
      "cve": "CVE-2021-29985",
      "id": "CVE-2021-29985",
      "initial_release_date": "2023-02-15T03:42:32Z",
      "product_status:known_affected": "1",
      "product_status:known_not_affected": "24",
      "product_status:recommended": "516",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-29985",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-29985.json",
      "version": "32"
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  }
}



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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

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.