Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300)
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: - Virtio block driver; - DMA engine subsystem; - GPU drivers; - HSI subsystem; - Media drivers; - Network drivers; - Ethernet team driver; - TTY drivers; - Framebuffer layer; - BTRFS file system; - Ext4 file system; - Network file system (NFS) server daemon; - Timer subsystem; - DCCP (Datagram Congestion Control Protocol); - IPv6 networking; - NET/ROM layer; - Packet sockets; - SCTP protocol; - VMware vSockets driver; - USB sound devices; (CVE-2021-47149, CVE-2021-47294, CVE-2021-47319, CVE-2021-47330, CVE-2021-47589, CVE-2023-52574, CVE-2023-52650, CVE-2024-27078, CVE-2024-35849, CVE-2024-49924, CVE-2024-50006, CVE-2024-50299, CVE-2024-53124, CVE-2024-53150, CVE-2024-56767, CVE-2025-21796, CVE-2025-37785, CVE-2025-37838, CVE-2025-38352, CVE-2025-38617, CVE-2025-38618)
{
"binaries": [
{
"binary_version": "4.4.0-1119.126",
"binary_name": "block-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "crypto-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "dasd-extra-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "dasd-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "fat-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "fb-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "firewire-core-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "floppy-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "fs-core-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "fs-secondary-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "input-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "ipmi-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "irda-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "kernel-image-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "linux-buildinfo-4.4.0-1119-fips"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "linux-fips-cloud-tools-common"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "linux-fips-headers-4.4.0-1119"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "linux-fips-source-4.4.0"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "linux-fips-tools-4.4.0-1119"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "linux-headers-4.4.0-1119-fips"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "linux-image-4.4.0-1119-fips"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "linux-image-hmac-4.4.0-1119-fips"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "linux-image-unsigned-4.4.0-1119-fips"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "linux-image-unsigned-hmac-4.4.0-1119-fips"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "linux-modules-4.4.0-1119-fips"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "linux-modules-extra-4.4.0-1119-fips"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "linux-tools-4.4.0-1119-fips"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "linux-udebs-fips"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "md-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "message-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "mouse-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "multipath-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "nfs-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "nic-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "nic-pcmcia-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "nic-shared-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "nic-usb-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "parport-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "pata-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "pcmcia-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "pcmcia-storage-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "plip-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "ppp-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "sata-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "scsi-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "serial-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "speakup-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "storage-core-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "usb-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "virtio-modules-4.4.0-1119-fips-di"
},
{
"binary_version": "4.4.0-1119.126",
"binary_name": "vlan-modules-4.4.0-1119-fips-di"
}
],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}
{
"cves": [
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2021-47149"
},
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2021-47294"
},
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2021-47319"
},
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2021-47330"
},
{
"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": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2021-47589"
},
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2023-52574"
},
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2023-52650"
},
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2024-27078"
},
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2024-35849"
},
{
"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": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2024-49924"
},
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2024-50006"
},
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
],
"id": "CVE-2024-50299"
},
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2024-53124"
},
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
],
"id": "CVE-2024-53150"
},
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2024-56767"
},
{
"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": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2025-21796"
},
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2025-37785"
},
{
"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": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2025-37838"
},
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
],
"id": "CVE-2025-38352"
},
{
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2025-38617"
},
{
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2025-38618"
},
{
"severity": [
{
"score": "high",
"type": "Ubuntu"
}
],
"id": "CVE-2025-40300"
}
],
"ecosystem": "Ubuntu:Pro:FIPS:16.04:LTS"
}