UBUNTU-CVE-2025-61661

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Source

https://ubuntu.com/security/CVE-2025-61661

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-61661

Upstream

CVE-2025-61661

Published

2025-11-18T19:15:00Z

Modified

2026-05-20T16:23:40.470596331Z

Severity

4.8 (Medium) CVSS_V3 - CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component. This flaw occurs because the bootloader mishandles string conversion when reading information from a USB device, allowing an attacker to exploit inconsistent length values. A local attacker can connect a maliciously configured USB device during the boot sequence to trigger this issue. A successful exploitation may lead GRUB to crash, leading to a Denial of Service. Data corruption may be also possible, although given the complexity of the exploit the impact is most likely limited.

References

Affected packages

Ubuntu:16.04:LTS

grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.55

1.56

1.57

1.58

1.59

1.61

1.62

1.63

1.64

1.65

1.66

1.66.1

1.66.2

1.66.6

1.66.7

1.66.8

1.66.9

1.66.11

1.66.12

1.66.14

1.66.15

1.66.16

1.66.17

1.66.18

1.66.19

1.66.20

1.66.21

1.66.22

1.66.23

1.66.26

1.66.27

1.66.28

1.66.29

1.167~16.04.1

1.167~16.04.2

1.167~16.04.4

1.167~16.04.6

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.167~16.04.6+2.04-1ubuntu44.1.2"
        },
        {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.167~16.04.6+2.04-1ubuntu44.1.2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

grub2-unsigned

Package

Name: grub2-unsigned
Purl: pkg:deb/ubuntu/grub2-unsigned?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.04-1ubuntu44

2.04-1ubuntu44.1

2.04-1ubuntu44.1.2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.04-1ubuntu44.1.2"
        },
        {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.04-1ubuntu44.1.2"
        },
        {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.04-1ubuntu44.1.2"
        },
        {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.04-1ubuntu44.1.2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

Ubuntu:18.04:LTS

grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.85

1.86

1.87

1.89

1.91

1.92

1.93

1.93.1

1.93.2

1.93.3

1.93.4

1.93.5

1.93.7

1.93.8

1.93.10

1.93.11

1.93.13

1.93.14

1.93.15

1.93.16

1.93.18

1.93.19

1.93.20

1.93.21

1.93.22

1.93.24

1.167~18.04.1

1.167~18.04.3

1.167~18.04.5

1.173.2~18.04.1

1.187.2~18.04.1

1.187.3~18.04.1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.187.3~18.04.1+2.06-2ubuntu14.1"
        },
        {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.187.3~18.04.1+2.06-2ubuntu14.1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

grub2-unsigned

Package

Name: grub2-unsigned
Purl: pkg:deb/ubuntu/grub2-unsigned?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.04-1ubuntu44

2.04-1ubuntu44.1

2.04-1ubuntu44.1.2

2.04-1ubuntu47.4

2.06-2ubuntu14

2.06-2ubuntu14.1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.06-2ubuntu14.1"
        },
        {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.06-2ubuntu14.1"
        },
        {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.06-2ubuntu14.1"
        },
        {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.06-2ubuntu14.1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

Ubuntu:20.04:LTS

grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.128

1.129

1.130

1.131

1.133

1.134

1.135

1.136

1.137

1.138

1.139

1.140

1.141

1.142

1.142.1

1.142.3

1.142.4

1.142.5

1.142.6

1.142.8

1.142.9

1.142.10

1.142.11

1.167

1.167.2

1.173.2~20.04.1

1.173.4

1.187.2~20.04.2

1.187.3~20.04.1

1.187.4~20.04.1

1.187.6~20.04.1

1.187.12~20.04

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.187.12~20.04+2.06-2ubuntu14.8"
        },
        {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.187.12~20.04+2.06-2ubuntu14.8"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

grub2-unsigned

Package

Name: grub2-unsigned
Purl: pkg:deb/ubuntu/grub2-unsigned?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.04-1ubuntu44

2.04-1ubuntu44.2

2.04-1ubuntu47.4

2.04-1ubuntu47.5

2.06-2ubuntu14

2.06-2ubuntu14.1

2.06-2ubuntu14.2

2.06-2ubuntu14.4

2.06-2ubuntu14.8

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.06-2ubuntu14.8"
        },
        {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.06-2ubuntu14.8"
        },
        {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.06-2ubuntu14.8"
        },
        {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.06-2ubuntu14.8"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

Ubuntu:22.04:LTS

grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.173

1.174

1.176

1.177

1.178

1.179

1.180

1.182~22.04.1

1.187.2

1.187.3~22.04.1

1.187.4~22.04.1

1.187.6

1.187.12

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.187.12+2.06-2ubuntu14.8"
        },
        {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.187.12+2.06-2ubuntu14.8"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

grub2-unsigned

Package

Name: grub2-unsigned
Purl: pkg:deb/ubuntu/grub2-unsigned?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.04-1ubuntu47

2.04-1ubuntu48

2.06-2ubuntu3

2.06-2ubuntu4

2.06-2ubuntu5

2.06-2ubuntu6

2.06-2ubuntu7

2.06-2ubuntu10

2.06-2ubuntu14

2.06-2ubuntu14.1

2.06-2ubuntu14.2

2.06-2ubuntu14.4

2.06-2ubuntu14.8

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.06-2ubuntu14.8"
        },
        {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.06-2ubuntu14.8"
        },
        {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.06-2ubuntu14.8"
        },
        {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.06-2ubuntu14.8"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

Ubuntu:24.04:LTS

grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.197

1.199

1.201

1.202

1.202.2

1.202.5

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.202.5+2.12-1ubuntu7.3"
        },
        {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.202.5+2.12-1ubuntu7.3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

grub2-unsigned

Package

Name: grub2-unsigned
Purl: pkg:deb/ubuntu/grub2-unsigned?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.12~rc1-10ubuntu4

2.12~rc1-12ubuntu2

2.12-1ubuntu1

2.12-1ubuntu7

2.12-1ubuntu7.1

2.12-1ubuntu7.3

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.12-1ubuntu7.3"
        },
        {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.12-1ubuntu7.3"
        },
        {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.12-1ubuntu7.3"
        },
        {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.12-1ubuntu7.3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

Ubuntu:25.10

grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.212

1.213

1.214

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.214+2.14~git20250718.0e36779-1ubuntu4"
        },
        {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.214+2.14~git20250718.0e36779-1ubuntu4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

grub2-unsigned

Package

Name: grub2-unsigned
Purl: pkg:deb/ubuntu/grub2-unsigned?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.12-5ubuntu11

2.14~git20250718.0e36779-1ubuntu1

2.14~git20250718.0e36779-1ubuntu4

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.14~git20250718.0e36779-1ubuntu4"
        },
        {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.14~git20250718.0e36779-1ubuntu4"
        },
        {
            "binary_name": "grub-efi-amd64-unsigned",
            "binary_version": "2.14~git20250718.0e36779-1ubuntu4"
        },
        {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.14~git20250718.0e36779-1ubuntu4"
        },
        {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.14~git20250718.0e36779-1ubuntu4"
        },
        {
            "binary_name": "grub-efi-arm64-unsigned",
            "binary_version": "2.14~git20250718.0e36779-1ubuntu4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

Ubuntu:26.04:LTS

grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.214

1.215

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.215+2.14-2ubuntu1"
        },
        {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.215+2.14-2ubuntu1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

grub2-unsigned

Package

Name: grub2-unsigned
Purl: pkg:deb/ubuntu/grub2-unsigned?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.14~git20250718.0e36779-1ubuntu4

2.14-2ubuntu1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.14-2ubuntu1"
        },
        {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.14-2ubuntu1"
        },
        {
            "binary_name": "grub-efi-amd64-unsigned",
            "binary_version": "2.14-2ubuntu1"
        },
        {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.14-2ubuntu1"
        },
        {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.14-2ubuntu1"
        },
        {
            "binary_name": "grub-efi-arm64-unsigned",
            "binary_version": "2.14-2ubuntu1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

Ubuntu:Pro:14.04:LTS

grub2

Package

Name: grub2
Purl: pkg:deb/ubuntu/grub2?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.00-19ubuntu2

2.00-19ubuntu3

2.00-19ubuntu4

2.00-20

2.00-21

2.00-22

2.02~beta2-5

2.02~beta2-6

2.02~beta2-7

2.02~beta2-8

2.02~beta2-9

2.02~beta2-9ubuntu1

2.02~beta2-9ubuntu1.1

2.02~beta2-9ubuntu1.2

2.02~beta2-9ubuntu1.3

2.02~beta2-9ubuntu1.4

2.02~beta2-9ubuntu1.5

2.02~beta2-9ubuntu1.6

2.02~beta2-9ubuntu1.7

2.02~beta2-9ubuntu1.8

2.02~beta2-9ubuntu1.11

2.02~beta2-9ubuntu1.12

2.02~beta2-9ubuntu1.14

2.02~beta2-9ubuntu1.15

2.02~beta2-9ubuntu1.16

2.02~beta2-9ubuntu1.17

2.02~beta2-9ubuntu1.20

2.02~beta2-9ubuntu1.21

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-common",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-coreboot",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-coreboot-bin",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-efi",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-efi-arm",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-efi-arm-bin",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-efi-ia32",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-efi-ia32-bin",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-emu",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-firmware-qemu",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-ieee1275",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-ieee1275-bin",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-linuxbios",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-pc",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-pc-bin",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-rescue-pc",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-theme-starfield",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-uboot",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-uboot-bin",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-xen",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub-xen-bin",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub2",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        },
        {
            "binary_name": "grub2-common",
            "binary_version": "2.02~beta2-9ubuntu1.21"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"

grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.22

1.23

1.24

1.25

1.26

1.27

1.30

1.31

1.32

1.33

1.34

1.34.1

1.34.2

1.34.3

1.34.4

1.34.5

1.34.6

1.34.7

1.34.8

1.34.9

1.34.13

1.34.14

1.34.16

1.34.17

1.34.18

1.34.20

1.34.22

1.34.24

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.34.24+2.02~beta2-9ubuntu1.21"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61661.json"