USN-8819-3 (UBUNTU-CVE-2025-38724)

Vulnerability from osv_ubuntu – Published: 2026-09-29 09:19 – Updated: 2026-09-29 09:19 – Source website
VLAI
Summary
linux-aws-hwe, linux-azure, linux-azure-4.15 vulnerabilities
Details

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 file system (NFS) server daemon; - IPv6 networking; - Netfilter; (CVE-2025-38724, CVE-2026-53131, CVE-2026-53221)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-38724",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/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": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "critical",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-53131",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-53221",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
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                }
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        }
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                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
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                  "type": "CVSS_V3"
                },
                {
                  "score": "critical",
                  "type": "Ubuntu"
                }
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            {
              "id": "CVE-2026-53131",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
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        "4.15.0-1186.199~16.04.1",
        "4.15.0-1187.200~16.04.1",
        "4.15.0-1188.201~16.04.1",
        "4.15.0-1189.202~16.04.1",
        "4.15.0-1190.203~16.04.1",
        "4.15.0-1191.204~16.04.1",
        "4.15.0-1192.205~16.04.1",
        "4.15.0-1194.207~16.04.1",
        "4.15.0-1195.208~16.04.1",
        "4.15.0-1196.209~16.04.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-38724",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/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": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "critical",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-53131",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-53221",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "linux-azure-4.15-cloud-tools-4.15.0-1207",
            "binary_version": "4.15.0-1207.222"
          },
          {
            "binary_name": "linux-azure-4.15-headers-4.15.0-1207",
            "binary_version": "4.15.0-1207.222"
          },
          {
            "binary_name": "linux-azure-4.15-tools-4.15.0-1207",
            "binary_version": "4.15.0-1207.222"
          },
          {
            "binary_name": "linux-buildinfo-4.15.0-1207-azure",
            "binary_version": "4.15.0-1207.222"
          },
          {
            "binary_name": "linux-cloud-tools-4.15.0-1207-azure",
            "binary_version": "4.15.0-1207.222"
          },
          {
            "binary_name": "linux-headers-4.15.0-1207-azure",
            "binary_version": "4.15.0-1207.222"
          },
          {
            "binary_name": "linux-image-unsigned-4.15.0-1207-azure",
            "binary_version": "4.15.0-1207.222"
          },
          {
            "binary_name": "linux-modules-4.15.0-1207-azure",
            "binary_version": "4.15.0-1207.222"
          },
          {
            "binary_name": "linux-modules-extra-4.15.0-1207-azure",
            "binary_version": "4.15.0-1207.222"
          },
          {
            "binary_name": "linux-tools-4.15.0-1207-azure",
            "binary_version": "4.15.0-1207.222"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "linux-azure-4.15",
        "purl": "pkg:deb/ubuntu/linux-azure-4.15@4.15.0-1207.222?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.15.0-1207.222"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.15.0-1082.92",
        "4.15.0-1083.93",
        "4.15.0-1089.99",
        "4.15.0-1091.101",
        "4.15.0-1092.102",
        "4.15.0-1093.103",
        "4.15.0-1095.105",
        "4.15.0-1096.106",
        "4.15.0-1099.110",
        "4.15.0-1100.111",
        "4.15.0-1102.113",
        "4.15.0-1103.114",
        "4.15.0-1104.116",
        "4.15.0-1106.118",
        "4.15.0-1108.120",
        "4.15.0-1109.121",
        "4.15.0-1110.122",
        "4.15.0-1111.123",
        "4.15.0-1112.125",
        "4.15.0-1113.126",
        "4.15.0-1114.127",
        "4.15.0-1115.128",
        "4.15.0-1118.131",
        "4.15.0-1121.134",
        "4.15.0-1122.135",
        "4.15.0-1123.136",
        "4.15.0-1124.137",
        "4.15.0-1125.138",
        "4.15.0-1126.139",
        "4.15.0-1127.140",
        "4.15.0-1129.142",
        "4.15.0-1130.143",
        "4.15.0-1131.144",
        "4.15.0-1133.146",
        "4.15.0-1134.147",
        "4.15.0-1136.149",
        "4.15.0-1137.150",
        "4.15.0-1138.151",
        "4.15.0-1139.152",
        "4.15.0-1142.156",
        "4.15.0-1145.160",
        "4.15.0-1146.161",
        "4.15.0-1149.164",
        "4.15.0-1150.165",
        "4.15.0-1151.166",
        "4.15.0-1153.168",
        "4.15.0-1157.172",
        "4.15.0-1158.173",
        "4.15.0-1159.174",
        "4.15.0-1161.176",
        "4.15.0-1162.177",
        "4.15.0-1163.178",
        "4.15.0-1164.179",
        "4.15.0-1165.180",
        "4.15.0-1166.181",
        "4.15.0-1167.182",
        "4.15.0-1168.183",
        "4.15.0-1169.184",
        "4.15.0-1170.185",
        "4.15.0-1171.186",
        "4.15.0-1172.187",
        "4.15.0-1173.188",
        "4.15.0-1174.189",
        "4.15.0-1175.190",
        "4.15.0-1176.191",
        "4.15.0-1177.192",
        "4.15.0-1178.193",
        "4.15.0-1179.194",
        "4.15.0-1180.195",
        "4.15.0-1181.196",
        "4.15.0-1182.197",
        "4.15.0-1183.198",
        "4.15.0-1184.199",
        "4.15.0-1185.200",
        "4.15.0-1186.201",
        "4.15.0-1187.202",
        "4.15.0-1188.203",
        "4.15.0-1189.204",
        "4.15.0-1190.205",
        "4.15.0-1191.206",
        "4.15.0-1192.207",
        "4.15.0-1193.208",
        "4.15.0-1194.209",
        "4.15.0-1195.210",
        "4.15.0-1196.211",
        "4.15.0-1197.212",
        "4.15.0-1199.214",
        "4.15.0-1200.215",
        "4.15.0-1201.216",
        "4.15.0-1202.217",
        "4.15.0-1204.219",
        "4.15.0-1205.220",
        "4.15.0-1206.221"
      ]
    }
  ],
  "aliases": [],
  "details": "Several 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 file system (NFS) server daemon;\n  - IPv6 networking;\n  - Netfilter;\n(CVE-2025-38724, CVE-2026-53131, CVE-2026-53221)\n",
  "id": "USN-8819-3",
  "modified": "2026-09-29T09:19:24Z",
  "published": "2026-09-29T09:19:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8819-3"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-38724"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-53131"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-53221"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-aws-hwe, linux-azure, linux-azure-4.15 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2025-38724",
    "UBUNTU-CVE-2026-53131",
    "UBUNTU-CVE-2026-53221"
  ]
}



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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.



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.