usn-8388-2
Vulnerability from osv_ubuntu
Published
2026-06-22 23:01
Modified
2026-07-06 18:13
Summary
linux-intel-iotg-5.15, linux-lowlatency, linux-lowlatency-hwe-5.15 vulnerabilities
Details

It was discovered that the Linux kernel did not properly handle shared page fragments during socket buffer operations, collectively known as Dirty Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the RxRPC networking subsystem when processing paged fragments. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43284, CVE-2026-43500)

It was discovered that a logic flaw existed in the XFRM ESP-in-TCP subsystem in the Linux kernel when handling socket buffer fragments. This flaw is known as Fragnesia. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43503, CVE-2026-46300)

Qualys discovered that a race condition existed in the ptrace subsystem of the Linux kernel when privileged processes are exiting. An unprivileged local attacker could use this issue to expose sensitive information. (CVE-2026-46333)

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: - RDS protocol; (CVE-2026-43494)

References
To clipboard 

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        "5.15.0-102.112~20.04.1",
        "5.15.0-105.115~20.04.1",
        "5.15.0-106.116~20.04.1",
        "5.15.0-107.117~20.04.1",
        "5.15.0-110.120~20.04.1",
        "5.15.0-113.123~20.04.1",
        "5.15.0-116.126~20.04.1",
        "5.15.0-117.127~20.04.1",
        "5.15.0-118.128~20.04.1",
        "5.15.0-119.129~20.04.1",
        "5.15.0-121.131~20.04.1",
        "5.15.0-122.132~20.04.1",
        "5.15.0-124.134~20.04.1",
        "5.15.0-125.135~20.04.1",
        "5.15.0-126.136~20.04.1",
        "5.15.0-127.137~20.04.1",
        "5.15.0-128.138~20.04.1",
        "5.15.0-129.139~20.04.1",
        "5.15.0-131.141~20.04.1",
        "5.15.0-133.143~20.04.1",
        "5.15.0-134.145~20.04.1",
        "5.15.0-135.146~20.04.1",
        "5.15.0-136.147~20.04.1",
        "5.15.0-138.148~20.04.1",
        "5.15.0-139.149~20.04.1",
        "5.15.0-140.150~20.04.1",
        "5.15.0-142.152~20.04.1",
        "5.15.0-143.153~20.04.1",
        "5.15.0-144.157~20.04.1",
        "5.15.0-145.158~20.04.1",
        "5.15.0-152.162~20.04.1",
        "5.15.0-153.163~20.04.1",
        "5.15.0-156.166~20.04.1",
        "5.15.0-157.167~20.04.1",
        "5.15.0-160.170~20.04.1",
        "5.15.0-161.171~20.04.1",
        "5.15.0-163.173~20.04.1",
        "5.15.0-164.174~20.04.1",
        "5.15.0-168.178~20.04.1",
        "5.15.0-170.180~20.04.1",
        "5.15.0-171.181~20.04.1",
        "5.15.0-173.183~20.04.1",
        "5.15.0-174.184~20.04.1",
        "5.15.0-175.185~20.04.1",
        "5.15.0-177.187~20.04.1",
        "5.15.0-178.188~20.04.1",
        "5.15.0-179.189~20.04.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-43284",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/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": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-43494",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:L/AT:N/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:H/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-2026-43500",
              "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": "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-2026-43503",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:L/AT:N/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:H/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:C/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-46300",
              "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": "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-2026-46333",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                  "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": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "linux-buildinfo-5.15.0-181-lowlatency",
            "binary_version": "5.15.0-181.191"
          },
          {
            "binary_name": "linux-buildinfo-5.15.0-181-lowlatency-64k",
            "binary_version": "5.15.0-181.191"
          },
          {
            "binary_name": "linux-cloud-tools-5.15.0-181-lowlatency",
            "binary_version": "5.15.0-181.191"
          },
          {
            "binary_name": "linux-headers-5.15.0-181-lowlatency",
            "binary_version": "5.15.0-181.191"
          },
          {
            "binary_name": "linux-headers-5.15.0-181-lowlatency-64k",
            "binary_version": "5.15.0-181.191"
          },
          {
            "binary_name": "linux-image-unsigned-5.15.0-181-lowlatency",
            "binary_version": "5.15.0-181.191"
          },
          {
            "binary_name": "linux-image-unsigned-5.15.0-181-lowlatency-64k",
            "binary_version": "5.15.0-181.191"
          },
          {
            "binary_name": "linux-lowlatency-cloud-tools-5.15.0-181",
            "binary_version": "5.15.0-181.191"
          },
          {
            "binary_name": "linux-lowlatency-headers-5.15.0-181",
            "binary_version": "5.15.0-181.191"
          },
          {
            "binary_name": "linux-lowlatency-tools-5.15.0-181",
            "binary_version": "5.15.0-181.191"
          },
          {
            "binary_name": "linux-modules-5.15.0-181-lowlatency",
            "binary_version": "5.15.0-181.191"
          },
          {
            "binary_name": "linux-modules-5.15.0-181-lowlatency-64k",
            "binary_version": "5.15.0-181.191"
          },
          {
            "binary_name": "linux-modules-iwlwifi-5.15.0-181-lowlatency",
            "binary_version": "5.15.0-181.191"
          },
          {
            "binary_name": "linux-tools-5.15.0-181-lowlatency",
            "binary_version": "5.15.0-181.191"
          },
          {
            "binary_name": "linux-tools-5.15.0-181-lowlatency-64k",
            "binary_version": "5.15.0-181.191"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "linux-lowlatency",
        "purl": "pkg:deb/ubuntu/linux-lowlatency@5.15.0-181.191?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.15.0-181.191"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.15.0-22.22",
        "5.15.0-23.23",
        "5.15.0-24.24",
        "5.15.0-27.28",
        "5.15.0-30.31",
        "5.15.0-33.34",
        "5.15.0-35.36",
        "5.15.0-37.39",
        "5.15.0-39.42",
        "5.15.0-40.43",
        "5.15.0-41.44",
        "5.15.0-43.46",
        "5.15.0-46.49",
        "5.15.0-47.53",
        "5.15.0-48.54",
        "5.15.0-50.56",
        "5.15.0-52.58",
        "5.15.0-53.59",
        "5.15.0-56.62",
        "5.15.0-57.63",
        "5.15.0-58.64",
        "5.15.0-60.66",
        "5.15.0-67.74",
        "5.15.0-69.76",
        "5.15.0-70.77",
        "5.15.0-71.78",
        "5.15.0-72.79",
        "5.15.0-73.80",
        "5.15.0-75.82",
        "5.15.0-76.83",
        "5.15.0-78.85",
        "5.15.0-79.88",
        "5.15.0-82.91",
        "5.15.0-83.92",
        "5.15.0-84.93",
        "5.15.0-86.95",
        "5.15.0-87.96",
        "5.15.0-88.98",
        "5.15.0-89.99",
        "5.15.0-91.101",
        "5.15.0-92.102",
        "5.15.0-94.104",
        "5.15.0-97.107",
        "5.15.0-100.110",
        "5.15.0-101.111",
        "5.15.0-102.112",
        "5.15.0-105.115",
        "5.15.0-106.116",
        "5.15.0-107.117",
        "5.15.0-110.120",
        "5.15.0-113.123",
        "5.15.0-116.126",
        "5.15.0-117.127",
        "5.15.0-118.128",
        "5.15.0-119.129",
        "5.15.0-121.131",
        "5.15.0-122.132",
        "5.15.0-124.134",
        "5.15.0-125.135",
        "5.15.0-126.136",
        "5.15.0-127.137",
        "5.15.0-128.138",
        "5.15.0-129.139",
        "5.15.0-131.141",
        "5.15.0-133.143",
        "5.15.0-134.145",
        "5.15.0-135.146",
        "5.15.0-136.147",
        "5.15.0-138.148",
        "5.15.0-139.149",
        "5.15.0-140.150",
        "5.15.0-141.151",
        "5.15.0-142.152",
        "5.15.0-143.153",
        "5.15.0-144.157",
        "5.15.0-145.158",
        "5.15.0-152.162",
        "5.15.0-153.163",
        "5.15.0-156.166",
        "5.15.0-157.167",
        "5.15.0-160.170",
        "5.15.0-161.171",
        "5.15.0-163.173",
        "5.15.0-164.174",
        "5.15.0-168.178",
        "5.15.0-170.180",
        "5.15.0-171.181",
        "5.15.0-173.183",
        "5.15.0-174.184",
        "5.15.0-175.185",
        "5.15.0-177.187",
        "5.15.0-178.188",
        "5.15.0-179.189"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that the Linux kernel did not properly handle shared page\nfragments during socket buffer operations, collectively known as Dirty\nFrag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the\nRxRPC networking subsystem when processing paged fragments. A local\nattacker could use this to escalate privileges, or possibly escape a\ncontainer. (CVE-2026-43284, CVE-2026-43500)\n\nIt was discovered that a logic flaw existed in the XFRM ESP-in-TCP\nsubsystem in the Linux kernel when handling socket buffer fragments. This\nflaw is known as Fragnesia. A local attacker could use this to escalate\nprivileges, or possibly escape a container. (CVE-2026-43503,\nCVE-2026-46300)\n\nQualys discovered that a race condition existed in the ptrace subsystem of\nthe Linux kernel when privileged processes are exiting. An unprivileged\nlocal attacker could use this issue to expose sensitive information.\n(CVE-2026-46333)\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  - RDS protocol;\n(CVE-2026-43494)\n",
  "id": "USN-8388-2",
  "modified": "2026-07-06T18:13:24Z",
  "published": "2026-06-22T23:01:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8388-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-43284"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-43494"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-43500"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-43503"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-46300"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-46333"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-intel-iotg-5.15, linux-lowlatency, linux-lowlatency-hwe-5.15 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-43284",
    "UBUNTU-CVE-2026-43494",
    "UBUNTU-CVE-2026-43500",
    "UBUNTU-CVE-2026-43503",
    "UBUNTU-CVE-2026-46300",
    "UBUNTU-CVE-2026-46333"
  ]
}



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Tags
Taxonomy of the tags.





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.