usn-8255-2
Vulnerability from osv_ubuntu
Published
2026-05-11 14:02
Modified
2026-07-04 16:36
Summary
linux-azure-5.15 vulnerabilities
Details

Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in the Ubuntu Linux kernel did not properly perform permission checks in certain situations. A local attacker could possibly use this to gain elevated privileges. (CVE-2023-2640)

Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in the Ubuntu Linux kernel did not properly perform permission checks in certain situations. A local attacker could possibly use this to gain elevated privileges. (CVE-2023-32629)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Network drivers; - NVME drivers; (CVE-2026-23112, CVE-2026-23273)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2023-2640",
              "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": "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-2023-32629",
              "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": "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-2026-23112",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-23273",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "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"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "linux-azure-5.15-cloud-tools-5.15.0-1111",
            "binary_version": "5.15.0-1111.120~20.04.1"
          },
          {
            "binary_name": "linux-azure-5.15-headers-5.15.0-1111",
            "binary_version": "5.15.0-1111.120~20.04.1"
          },
          {
            "binary_name": "linux-azure-5.15-tools-5.15.0-1111",
            "binary_version": "5.15.0-1111.120~20.04.1"
          },
          {
            "binary_name": "linux-buildinfo-5.15.0-1111-azure",
            "binary_version": "5.15.0-1111.120~20.04.1"
          },
          {
            "binary_name": "linux-cloud-tools-5.15.0-1111-azure",
            "binary_version": "5.15.0-1111.120~20.04.1"
          },
          {
            "binary_name": "linux-headers-5.15.0-1111-azure",
            "binary_version": "5.15.0-1111.120~20.04.1"
          },
          {
            "binary_name": "linux-image-unsigned-5.15.0-1111-azure",
            "binary_version": "5.15.0-1111.120~20.04.1"
          },
          {
            "binary_name": "linux-modules-5.15.0-1111-azure",
            "binary_version": "5.15.0-1111.120~20.04.1"
          },
          {
            "binary_name": "linux-modules-extra-5.15.0-1111-azure",
            "binary_version": "5.15.0-1111.120~20.04.1"
          },
          {
            "binary_name": "linux-modules-involflt-5.15.0-1111-azure",
            "binary_version": "5.15.0-1111.120~20.04.1"
          },
          {
            "binary_name": "linux-tools-5.15.0-1111-azure",
            "binary_version": "5.15.0-1111.120~20.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "linux-azure-5.15",
        "purl": "pkg:deb/ubuntu/linux-azure-5.15@5.15.0-1111.120~20.04.1?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.15.0-1111.120~20.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.15.0-1007.8~20.04.1",
        "5.15.0-1008.9~20.04.1",
        "5.15.0-1013.16~20.04.1",
        "5.15.0-1014.17~20.04.1",
        "5.15.0-1017.20~20.04.1",
        "5.15.0-1019.24~20.04.1",
        "5.15.0-1020.25~20.04.1",
        "5.15.0-1021.26~20.04.1",
        "5.15.0-1022.27~20.04.1",
        "5.15.0-1023.29~20.04.1",
        "5.15.0-1029.36~20.04.1",
        "5.15.0-1030.37~20.04.1",
        "5.15.0-1031.38~20.04.1",
        "5.15.0-1033.40~20.04.1",
        "5.15.0-1034.41~20.04.1",
        "5.15.0-1035.42~20.04.1",
        "5.15.0-1036.43~20.04.1",
        "5.15.0-1037.44~20.04.1",
        "5.15.0-1038.45~20.04.1",
        "5.15.0-1039.46~20.04.1",
        "5.15.0-1040.47~20.04.1",
        "5.15.0-1041.48~20.04.1",
        "5.15.0-1042.49~20.04.1",
        "5.15.0-1043.50~20.04.1",
        "5.15.0-1045.52~20.04.1",
        "5.15.0-1046.53~20.04.1",
        "5.15.0-1047.54~20.04.1",
        "5.15.0-1049.56~20.04.1",
        "5.15.0-1050.57~20.04.1",
        "5.15.0-1051.59~20.04.1",
        "5.15.0-1052.60~20.04.1",
        "5.15.0-1053.61~20.04.1",
        "5.15.0-1054.62~20.04.1",
        "5.15.0-1056.64~20.04.1",
        "5.15.0-1057.65~20.04.1",
        "5.15.0-1058.66~20.04.2",
        "5.15.0-1059.67~20.04.1",
        "5.15.0-1060.69~20.04.1",
        "5.15.0-1061.70~20.04.1",
        "5.15.0-1063.72~20.04.1",
        "5.15.0-1064.73~20.04.1",
        "5.15.0-1065.74~20.04.1",
        "5.15.0-1067.76~20.04.1",
        "5.15.0-1068.77~20.04.1",
        "5.15.0-1070.79~20.04.1",
        "5.15.0-1071.80~20.04.1",
        "5.15.0-1072.81~20.04.1",
        "5.15.0-1073.82~20.04.1",
        "5.15.0-1074.83~20.04.1",
        "5.15.0-1075.84~20.04.1",
        "5.15.0-1078.87~20.04.1",
        "5.15.0-1079.88~20.04.1",
        "5.15.0-1081.90~20.04.1",
        "5.15.0-1082.91~20.04.1",
        "5.15.0-1086.95~20.04.1",
        "5.15.0-1087.96~20.04.1",
        "5.15.0-1088.97~20.04.1",
        "5.15.0-1089.98~20.04.1",
        "5.15.0-1091.100~20.04.1",
        "5.15.0-1094.103~20.04.1",
        "5.15.0-1095.104~20.04.1",
        "5.15.0-1096.105~20.04.1",
        "5.15.0-1097.106~20.04.1",
        "5.15.0-1098.107~20.04.1",
        "5.15.0-1102.111~20.04.1",
        "5.15.0-1103.112~20.04.1",
        "5.15.0-1110.119~20.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFS\nimplementation in the Ubuntu Linux kernel did not properly perform\npermission checks in certain situations. A local attacker could possibly\nuse this to gain elevated privileges. (CVE-2023-2640)\n\nShir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in\nthe Ubuntu Linux kernel did not properly perform permission checks in\ncertain situations. A local attacker could possibly use this to gain\nelevated privileges. (CVE-2023-32629)\n\nSeveral security issues were discovered in the Linux kernel.\nAn attacker could possibly use these to compromise the system.\nThis update corrects flaws in the following subsystems:\n  - Network drivers;\n  - NVME drivers;\n(CVE-2026-23112, CVE-2026-23273)\n",
  "id": "USN-8255-2",
  "modified": "2026-07-04T16:36:17Z",
  "published": "2026-05-11T14:02:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8255-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-2640"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-32629"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-23112"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-23273"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-azure-5.15 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2023-2640",
    "UBUNTU-CVE-2023-32629",
    "UBUNTU-CVE-2026-23112",
    "UBUNTU-CVE-2026-23273"
  ]
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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