USN-8847-2 (UBUNTU-CVE-2026-35189)

Vulnerability from osv_ubuntu – Published: 2026-09-29 23:28 – Updated: 2026-09-30 20:43 – Source website
VLAI
Summary
openssl, openssl1.0 vulnerabilities
Details

USN-8847-1 fixed vulnerabilities in OpenSSL. This update provides the corresponding fix for OpenSSL on Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.

Original advisory details:

It was discovered that OpenSSL incorrectly handled certain certificate revocation list distribution point names. An attacker could possibly use this issue to cause OpenSSL to consume excessive memory, resulting in a denial of service. (CVE-2026-35189)

It was discovered that OpenSSL incorrectly implemented scalar multiplication for non-NIST elliptic curves. An attacker could possibly use this issue to perform a timing side-channel attack and obtain sensitive information. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2026-54872)

It was discovered that OpenSSL incorrectly implemented SM2 signature generation. An attacker could possibly use this issue to perform a timing side-channel attack and obtain sensitive information. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2026-77696)

It was discovered that OpenSSL incorrectly handled DTLS retransmission of handshake messages. An attacker could possibly use this issue to cause incorrect handshake behavior or a denial of service. (CVE-2026-84782)

References
To clipboard 

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              "id": "CVE-2026-84782",
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                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
                  "type": "CVSS_V3"
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            },
            {
              "id": "CVE-2026-54872",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
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              ]
            },
            {
              "id": "CVE-2026-77696",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
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                  "score": "low",
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              ]
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            {
              "id": "CVE-2026-84782",
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                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
                  "type": "CVSS_V3"
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  ],
  "aliases": [],
  "details": "USN-8847-1 fixed vulnerabilities in OpenSSL. This update provides the\ncorresponding fix for OpenSSL on Ubuntu 14.04 LTS, Ubuntu 16.04 LTS,\nUbuntu 18.04 LTS and Ubuntu 20.04 LTS.\n\nOriginal advisory details:\n\n It was discovered that OpenSSL incorrectly handled certain certificate\n revocation list distribution point names. An attacker could possibly use\n this issue to cause OpenSSL to consume excessive memory, resulting in a\n denial of service. (CVE-2026-35189)\n\n It was discovered that OpenSSL incorrectly implemented scalar\n multiplication for non-NIST elliptic curves. An attacker could possibly use\n this issue to perform a timing side-channel attack and obtain\n sensitive information. This issue only affected Ubuntu 18.04 LTS and\n Ubuntu 20.04 LTS. (CVE-2026-54872)\n\n It was discovered that OpenSSL incorrectly implemented SM2 signature\n generation. An attacker could possibly use this issue to perform a\n timing side-channel attack and obtain sensitive information. This issue\n only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2026-77696)\n\n It was discovered that OpenSSL incorrectly handled DTLS retransmission\n of handshake messages. An attacker could possibly use this issue to\n cause incorrect handshake behavior or a denial of service.\n (CVE-2026-84782)",
  "id": "USN-8847-2",
  "modified": "2026-09-30T20:43:33Z",
  "published": "2026-09-29T23:28:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8847-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-35189"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-54872"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-77696"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-84782"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "openssl, openssl1.0 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-35189",
    "UBUNTU-CVE-2026-54872",
    "UBUNTU-CVE-2026-77696",
    "UBUNTU-CVE-2026-84782"
  ]
}



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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.



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.