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.
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"binary_name": "linux-tools-4.15.0-1148-fips",
"binary_version": "4.15.0-1148.160"
}
],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}{
"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:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:FIPS-updates:18.04:LTS"
}
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8390-1.json"
{
"binaries": [
{
"binary_name": "linux-buildinfo-4.15.0-2094-gcp-fips",
"binary_version": "4.15.0-2094.100"
},
{
"binary_name": "linux-gcp-fips-headers-4.15.0-2094",
"binary_version": "4.15.0-2094.100"
},
{
"binary_name": "linux-gcp-fips-tools-4.15.0-2094",
"binary_version": "4.15.0-2094.100"
},
{
"binary_name": "linux-headers-4.15.0-2094-gcp-fips",
"binary_version": "4.15.0-2094.100"
},
{
"binary_name": "linux-image-unsigned-4.15.0-2094-gcp-fips",
"binary_version": "4.15.0-2094.100"
},
{
"binary_name": "linux-image-unsigned-hmac-4.15.0-2094-gcp-fips",
"binary_version": "4.15.0-2094.100"
},
{
"binary_name": "linux-modules-4.15.0-2094-gcp-fips",
"binary_version": "4.15.0-2094.100"
},
{
"binary_name": "linux-modules-extra-4.15.0-2094-gcp-fips",
"binary_version": "4.15.0-2094.100"
},
{
"binary_name": "linux-tools-4.15.0-2094-gcp-fips",
"binary_version": "4.15.0-2094.100"
}
],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}{
"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:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:FIPS-updates:18.04:LTS"
}
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8390-1.json"