Vulnerability-Lookup

USN-8579-1 (UBUNTU-CVE-2024-5300)

Vulnerability from osv_ubuntu – Published: 2026-07-21 14:24 – Updated: 2026-07-21 14:24 – Source website

Summary

snapd vulnerabilities

Details

James Henstridge discovered that snapd's default apparmor template did not restrict access to systemd-userdbd varlink interface. A local attacker could possibly use this issue to obtain sensitive information. (CVE-2024-5300)

Qualys discovered that snap-confine can be tricked to create attacker-controlled files at certain privileged locations. A local attacker could possibly use this issue to bypass intended restrictions and escalate privileges to root. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-8933)

Zygmunt Krynicki discovered that snapd's default seccomp template did not restrict the creation of executables with the set-user-ID attribute. A local attacker could possibly use this issue to create and execute setuid binaries. (CVE-2026-15226)

References

URL

Type

	https://ubuntu.com/security/notices/USN-8579-1	ADVISORY
	https://ubuntu.com/security/CVE-2024-5300	REPORT
	https://ubuntu.com/security/CVE-2026-8933	REPORT
	https://ubuntu.com/security/CVE-2026-15226	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2024-5300",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-15226",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:16.04:LTS"
        }
      },
      "ecosystem_specific": {
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            "binary_version": "2.61.4ubuntu0.16.04.1+esm4"
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                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
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            },
            {
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                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
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            {
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    },
    {
      "database_specific": {
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              "id": "CVE-2024-5300",
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                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-8933",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-15226",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
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            "binary_version": "2.76+ubuntu24.04.1"
          },
          {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.76+ubuntu24.04.1"
          },
          {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.76+ubuntu24.04.1"
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            "binary_name": "ubuntu-snappy",
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        "2.74.1+ubuntu24.04.4",
        "2.75.2+ubuntu24.04",
        "2.76+ubuntu24.04"
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    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2024-5300",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-8933",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-15226",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.76+ubuntu26.04.3"
          },
          {
            "binary_name": "snapd",
            "binary_version": "2.76+ubuntu26.04.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "snapd",
        "purl": "pkg:deb/ubuntu/snapd@2.76+ubuntu26.04.3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.76+ubuntu26.04.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.71.1+ubuntu25.10.1",
        "2.72+ubuntu26.04.1",
        "2.73+ubuntu26.04.1",
        "2.74+ubuntu26.04",
        "2.74.1+ubuntu26.04",
        "2.74.1+ubuntu26.04.3",
        "2.74.1+ubuntu26.04.4",
        "2.75.2+ubuntu26.04.2",
        "2.76+ubuntu26.04.2"
      ]
    }
  ],
  "aliases": [],
  "details": "James Henstridge discovered that snapd\u0027s default apparmor template did\nnot restrict access to systemd-userdbd varlink interface. A local\nattacker could possibly use this issue to obtain sensitive information.\n(CVE-2024-5300)\n\nQualys discovered that snap-confine can be tricked to create\nattacker-controlled files at certain privileged locations. A local\nattacker could possibly use this issue to bypass intended restrictions\nand escalate privileges to root. This issue only affected\nUbuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.\n(CVE-2026-8933)\n\nZygmunt Krynicki discovered that snapd\u0027s default seccomp template\ndid not restrict the creation of executables with the set-user-ID\nattribute. A local attacker could possibly use this issue to create\nand execute setuid binaries. (CVE-2026-15226)",
  "id": "USN-8579-1",
  "modified": "2026-07-21T14:24:27Z",
  "published": "2026-07-21T14:24:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8579-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-5300"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-8933"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-15226"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "snapd vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2024-5300",
    "UBUNTU-CVE-2026-8933",
    "UBUNTU-CVE-2026-15226"
  ]
}

UBUNTU-CVE-2024-5300 (CVE-2024-5300)

Vulnerability from osv_ubuntu – Published: 2026-07-21 14:00 – Updated: 2026-07-29 07:41 – Source website

Details

An access control bypass and information disclosure vulnerability exists in the base AppArmor security profile configuration of Canonical snapd. The abstraction rules located in /etc/apparmor.d/abstractions/nss-systemd (inherited via ) inadvertently permit strictly confined snap applications, which lack the privileged account-control interface, to interact directly with the io.systemd.Multiplexer and io.systemd.NameServiceSwitch UNIX domain sockets under /run/systemd/userdb/. On systems where the systemd-userdbd service is installed and operational, the service fails to distinguish between an unconfined root user on the host system and a restricted root user running within a snap application's sandbox (such as a daemon or configuration hook). Because systemd-userdbd returns "complete" user records—including sensitive hashed user passwords from /etc/shadow—when queried by a process running as root, a compromised or malicious strictly confined snap executing code as root can successfully query the Varlink interface to retrieve all system password hashes, bypassing intended snap sandbox restrictions. This issue is mitigated by the fact that systemd-userdbd is not installed by default on standard Ubuntu deployments.

Severity

5.6 (Medium)


                    
                      CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2024-5300	REPORT
	https://www.cve.org/CVERecord?id=CVE-2024-5300	REPORT
	https://ubuntu.com/security/notices/USN-8579-1	ADVISORY

JSON

To clipboard

{
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      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
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            "binary_version": "2.75.2+ubuntu25.10"
          },
          {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.75.2+ubuntu25.10"
          },
          {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.75.2+ubuntu25.10"
          },
          {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.75.2+ubuntu25.10"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "snapd",
        "purl": "pkg:deb/ubuntu/snapd@2.75.2+ubuntu25.10?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.67.1+25.04",
        "2.68.5+ubuntu25.10.2",
        "2.71+ubuntu25.10",
        "2.71.1+ubuntu25.10.1",
        "2.72+ubuntu25.10.2",
        "2.73+ubuntu25.10",
        "2.73+ubuntu25.10.1",
        "2.74.1+ubuntu25.10.4",
        "2.75.2+ubuntu25.10"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.76+ubuntu26.04.3"
          },
          {
            "binary_name": "snapd",
            "binary_version": "2.76+ubuntu26.04.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "snapd",
        "purl": "pkg:deb/ubuntu/snapd@2.76+ubuntu26.04.3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.76+ubuntu26.04.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.71.1+ubuntu25.10.1",
        "2.72+ubuntu26.04.1",
        "2.73+ubuntu26.04.1",
        "2.74+ubuntu26.04",
        "2.74.1+ubuntu26.04",
        "2.74.1+ubuntu26.04.3",
        "2.74.1+ubuntu26.04.4",
        "2.75.2+ubuntu26.04.2",
        "2.76+ubuntu26.04.2"
      ]
    }
  ],
  "aliases": [],
  "details": "An access control bypass and information disclosure vulnerability exists in the base AppArmor security profile configuration of Canonical snapd. The abstraction rules located in /etc/apparmor.d/abstractions/nss-systemd (inherited via ) inadvertently permit strictly confined snap applications, which lack the privileged account-control interface, to interact directly with the io.systemd.Multiplexer and io.systemd.NameServiceSwitch UNIX domain sockets under /run/systemd/userdb/. On systems where the systemd-userdbd service is installed and operational, the service fails to distinguish between an unconfined root user on the host system and a restricted root user running within a snap application\u0027s sandbox (such as a daemon or configuration hook). Because systemd-userdbd returns \"complete\" user records\u2014including sensitive hashed user passwords from /etc/shadow\u2014when queried by a process running as root, a compromised or malicious strictly confined snap executing code as root can successfully query the Varlink interface to retrieve all system password hashes, bypassing intended snap sandbox restrictions. This issue is mitigated by the fact that systemd-userdbd is not installed by default on standard Ubuntu deployments.",
  "id": "UBUNTU-CVE-2024-5300",
  "modified": "2026-07-29T07:41:34Z",
  "published": "2026-07-21T14:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-5300"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-5300"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8579-1"
    }
  ],
  "related": [
    "USN-8579-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2024-5300"
  ]
}

UBUNTU-CVE-2026-15226 (CVE-2026-15226)

Vulnerability from osv_ubuntu – Published: 2026-07-21 14:00 – Updated: 2026-07-21 21:01 – Source website

Details

A sandbox confinement bypass vulnerability exists in Canonical snapd within its internal execution environment compiler (snap-confine). The default seccomp security templates generated by the engine to restrict system calls do not filter or reject process operations capable of creating or manipulating file execution flags with set-user-ID attributes. Consequently, an application running within a strictly confined snap environment can successfully compile or drop binaries and apply setuid properties to them. If a compromised or malicious process inside the snap sandbox executes these generated setuid binaries, it can potentially circumvent architectural sandboxing assumptions, drop intended restriction policies, or execute privileged actions inside the container namespace that should otherwise be strictly blocked. The vulnerability has been resolved by hardening the seccomp template engine to block the execution and creation of setuid executables by sandboxed snap processes.

Severity

8.4 (High)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

N/A (UNKNOWN)


                    
                      high

References

URL

Type

	https://ubuntu.com/security/CVE-2026-15226	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-15226	REPORT
	https://ubuntu.com/security/notices/USN-8579-1	ADVISORY

JSON

To clipboard

{
  "affected": [
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      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
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      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "snapd",
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        ],
        "priority_reason": "CVSS high"
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      "package": {
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      "versions": [
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          {
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      "package": {
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      "ranges": [
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          "events": [
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        "priority_reason": "CVSS high"
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      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "snapd",
        "purl": "pkg:deb/ubuntu/snapd@2.76+ubuntu26.04.3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.76+ubuntu26.04.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.71.1+ubuntu25.10.1",
        "2.72+ubuntu26.04.1",
        "2.73+ubuntu26.04.1",
        "2.74+ubuntu26.04",
        "2.74.1+ubuntu26.04",
        "2.74.1+ubuntu26.04.3",
        "2.74.1+ubuntu26.04.4",
        "2.75.2+ubuntu26.04.2",
        "2.76+ubuntu26.04.2"
      ]
    }
  ],
  "aliases": [],
  "details": "A sandbox confinement bypass vulnerability exists in Canonical snapd within its internal execution environment compiler (snap-confine). The default seccomp security templates generated by the engine to restrict system calls do not filter or reject process operations capable of creating or manipulating file execution flags with set-user-ID attributes. Consequently, an application running within a strictly confined snap environment can successfully compile or drop binaries and apply setuid properties to them. If a compromised or malicious process inside the snap sandbox executes these generated setuid binaries, it can potentially circumvent architectural sandboxing assumptions, drop intended restriction policies, or execute privileged actions inside the container namespace that should otherwise be strictly blocked. The vulnerability has been resolved by hardening the seccomp template engine to block the execution and creation of setuid executables by sandboxed snap processes.",
  "id": "UBUNTU-CVE-2026-15226",
  "modified": "2026-07-21T21:01:23Z",
  "published": "2026-07-21T14:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-15226"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-15226"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8579-1"
    }
  ],
  "related": [
    "USN-8579-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "high",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-15226"
  ]
}

UBUNTU-CVE-2026-8933 (CVE-2026-8933)

Vulnerability from osv_ubuntu – Published: 2026-07-21 14:00 – Updated: 2026-07-29 07:53 – Source website

Details

A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core component used internally by Canonical snapd to construct the secure execution environment for snap applications. This vulnerability uniquely affects versions of snap-confine configured with set-capabilities (rather than standard set-uid-root installations). Due to a flaw in how privilege boundaries or security sandboxes are initialized when the binary runs under limited ambient capabilities, a local, unprivileged attacker can exploit this behavior to bypass intended restrictions and execute arbitrary code. Successful exploitation allows the local user to elevate their privileges to full root authority.

Severity

7.8 (High)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      high

References

URL

Type

	https://ubuntu.com/security/CVE-2026-8933	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-8933	REPORT
	https://ubuntu.com/security/notices/USN-8579-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.76+ubuntu22.04.1"
          },
          {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.76+ubuntu22.04.1"
          },
          {
            "binary_name": "snap-confine",
            "binary_version": "2.76+ubuntu22.04.1"
          },
          {
            "binary_name": "snapd",
            "binary_version": "2.76+ubuntu22.04.1"
          },
          {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.76+ubuntu22.04.1"
          },
          {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.76+ubuntu22.04.1"
          },
          {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.76+ubuntu22.04.1"
          },
          {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.76+ubuntu22.04.1"
          },
          {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.76+ubuntu22.04.1"
          }
        ],
        "priority_reason": "Local Privilege Escalation"
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "snapd",
        "purl": "pkg:deb/ubuntu/snapd@2.76+ubuntu22.04.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.76+ubuntu22.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.53+21.10ubuntu1",
        "2.54.2+22.04ubuntu1",
        "2.54.2+22.04ubuntu2",
        "2.54.2+22.04ubuntu3",
        "2.54.3+git19.g868fc21+22.04",
        "2.54.3+git26.g360067e+22.04",
        "2.55.2+22.04",
        "2.55.2+22.04.1",
        "2.55.3+22.04",
        "2.55.3+22.04ubuntu1",
        "2.55.5+22.04",
        "2.56.2+22.04ubuntu1",
        "2.57.4+22.04",
        "2.57.5+22.04",
        "2.57.5+22.04ubuntu0.1",
        "2.58+22.04",
        "2.58+22.04.1",
        "2.61.3+22.04",
        "2.62+22.04",
        "2.63+22.04",
        "2.63+22.04ubuntu0.1",
        "2.65.3+22.04",
        "2.66.1+22.04",
        "2.67.1+22.04",
        "2.68.5+ubuntu22.04.1",
        "2.71+ubuntu22.04",
        "2.72+ubuntu22.04",
        "2.73+ubuntu22.04",
        "2.73+ubuntu22.04.1",
        "2.74.1+ubuntu22.04.4",
        "2.75.2+ubuntu22.04",
        "2.76+ubuntu22.04"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.76+ubuntu24.04.1"
          },
          {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.76+ubuntu24.04.1"
          },
          {
            "binary_name": "snap-confine",
            "binary_version": "2.76+ubuntu24.04.1"
          },
          {
            "binary_name": "snapd",
            "binary_version": "2.76+ubuntu24.04.1"
          },
          {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.76+ubuntu24.04.1"
          },
          {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.76+ubuntu24.04.1"
          },
          {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.76+ubuntu24.04.1"
          },
          {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.76+ubuntu24.04.1"
          },
          {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.76+ubuntu24.04.1"
          }
        ],
        "priority_reason": "Local Privilege Escalation"
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "snapd",
        "purl": "pkg:deb/ubuntu/snapd@2.76+ubuntu24.04.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.76+ubuntu24.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.60.4+23.10",
        "2.61.3+24.04",
        "2.62+24.04build1",
        "2.63+24.04",
        "2.63+24.04ubuntu0.1",
        "2.63.1+24.04",
        "2.65.3+24.04",
        "2.66.1+24.04",
        "2.67.1+24.04",
        "2.68.5+ubuntu24.04.1",
        "2.71+ubuntu24.04",
        "2.72+ubuntu24.04",
        "2.73+ubuntu24.04",
        "2.73+ubuntu24.04.1",
        "2.73+ubuntu24.04.2",
        "2.74.1+ubuntu24.04.4",
        "2.75.2+ubuntu24.04",
        "2.76+ubuntu24.04"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.76+ubuntu26.04.3"
          },
          {
            "binary_name": "snapd",
            "binary_version": "2.76+ubuntu26.04.3"
          }
        ],
        "priority_reason": "Local Privilege Escalation"
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "snapd",
        "purl": "pkg:deb/ubuntu/snapd@2.76+ubuntu26.04.3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.76+ubuntu26.04.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.71.1+ubuntu25.10.1",
        "2.72+ubuntu26.04.1",
        "2.73+ubuntu26.04.1",
        "2.74+ubuntu26.04",
        "2.74.1+ubuntu26.04",
        "2.74.1+ubuntu26.04.3",
        "2.74.1+ubuntu26.04.4",
        "2.75.2+ubuntu26.04.2",
        "2.76+ubuntu26.04.2"
      ]
    }
  ],
  "aliases": [],
  "details": "A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core component used internally by Canonical snapd to construct the secure execution environment for snap applications. This vulnerability uniquely affects versions of snap-confine configured with set-capabilities (rather than standard set-uid-root installations). Due to a flaw in how privilege boundaries or security sandboxes are initialized when the binary runs under limited ambient capabilities, a local, unprivileged attacker can exploit this behavior to bypass intended restrictions and execute arbitrary code. Successful exploitation allows the local user to elevate their privileges to full root authority.",
  "id": "UBUNTU-CVE-2026-8933",
  "modified": "2026-07-29T07:53:17Z",
  "published": "2026-07-21T14:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-8933"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-8933"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8579-1"
    }
  ],
  "related": [
    "USN-8579-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "high",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-8933"
  ]
}

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

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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USN-8579-1 (UBUNTU-CVE-2024-5300)

UBUNTU-CVE-2024-5300 (CVE-2024-5300)

UBUNTU-CVE-2026-15226 (CVE-2026-15226)

UBUNTU-CVE-2026-8933 (CVE-2026-8933)

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