UBUNTU-CVE-2026-31790

See a problem?
Please try reporting it to the source first.

Source

https://ubuntu.com/security/CVE-2026-31790

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31790.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-31790

Upstream

CVE-2026-31790

Downstream

USN-8155-1

Related

USN-8155-1

Published

2026-04-07T00:00:00Z

Modified

2026-04-17T10:36:05.741511Z

Severity

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

Summary

[none]

Details

Issue summary: Applications using RSASVE key encapsulation to establish a secret encryption key can send contents of an uninitialized memory buffer to a malicious peer. Impact summary: The uninitialized buffer might contain sensitive data from the previous execution of the application process which leads to sensitive data leakage to an attacker. RSApublicencrypt() returns the number of bytes written on success and -1 on error. The affected code tests only whether the return value is non-zero. As a result, if RSA encryption fails, encapsulation can still return success to the caller, set the output lengths, and leave the caller to use the contents of the ciphertext buffer as if a valid KEM ciphertext had been produced. If applications use EVPPKEYencapsulate() with RSA/RSASVE on an attacker-supplied invalid RSA public key without first validating that key, then this may cause stale or uninitialized contents of the caller-provided ciphertext buffer to be disclosed to the attacker in place of the KEM ciphertext. As a workaround calling EVPPKEYpubliccheck() or EVPPKEYpubliccheckquick() before EVPPKEY_encapsulate() will mitigate the issue. The FIPS modules in 3.6, 3.5, 3.4, 3.3, 3.1 and 3.0 are affected by this issue.

References

Affected packages

Ubuntu:22.04:LTS

openssl

Package

Name: openssl
Purl: pkg:deb/ubuntu/openssl@3.0.2-0ubuntu1.23?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.0.2-0ubuntu1.23

Affected versions

1.*

1.1.1l-1ubuntu1

3.*

3.0.0-1ubuntu1

3.0.1-0ubuntu1

3.0.2-0ubuntu1

3.0.2-0ubuntu1.1

3.0.2-0ubuntu1.2

3.0.2-0ubuntu1.4

3.0.2-0ubuntu1.5

3.0.2-0ubuntu1.6

3.0.2-0ubuntu1.7

3.0.2-0ubuntu1.8

3.0.2-0ubuntu1.9

3.0.2-0ubuntu1.10

3.0.2-0ubuntu1.12

3.0.2-0ubuntu1.13

3.0.2-0ubuntu1.14

3.0.2-0ubuntu1.15

3.0.2-0ubuntu1.16

3.0.2-0ubuntu1.17

3.0.2-0ubuntu1.18

3.0.2-0ubuntu1.19

3.0.2-0ubuntu1.20

3.0.2-0ubuntu1.21

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3.0.2-0ubuntu1.23",
            "binary_name": "libssl-dev"
        },
        {
            "binary_version": "3.0.2-0ubuntu1.23",
            "binary_name": "libssl3"
        },
        {
            "binary_version": "3.0.2-0ubuntu1.23",
            "binary_name": "openssl"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31790.json"

Ubuntu:24.04:LTS

edk2

Package

Name: edk2
Purl: pkg:deb/ubuntu/edk2@2024.02-2ubuntu0.8?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2023.*

2023.05-2

2023.11-2

2023.11-3

2023.11-4

2023.11-5

2023.11-6

2023.11-8

2024.*

2024.02-1

2024.02-2

2024.02-2ubuntu0.1

2024.02-2ubuntu0.3

2024.02-2ubuntu0.4

2024.02-2ubuntu0.5

2024.02-2ubuntu0.6

2024.02-2ubuntu0.7

2024.02-2ubuntu0.8

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2024.02-2ubuntu0.8",
            "binary_name": "efi-shell-aa64"
        },
        {
            "binary_version": "2024.02-2ubuntu0.8",
            "binary_name": "efi-shell-arm"
        },
        {
            "binary_version": "2024.02-2ubuntu0.8",
            "binary_name": "efi-shell-ia32"
        },
        {
            "binary_version": "2024.02-2ubuntu0.8",
            "binary_name": "efi-shell-riscv64"
        },
        {
            "binary_version": "2024.02-2ubuntu0.8",
            "binary_name": "efi-shell-x64"
        },
        {
            "binary_version": "2024.02-2ubuntu0.8",
            "binary_name": "ovmf"
        },
        {
            "binary_version": "2024.02-2ubuntu0.8",
            "binary_name": "ovmf-ia32"
        },
        {
            "binary_version": "2024.02-2ubuntu0.8",
            "binary_name": "ovmf-legacy"
        },
        {
            "binary_version": "2024.02-2ubuntu0.8",
            "binary_name": "qemu-efi-aarch64"
        },
        {
            "binary_version": "2024.02-2ubuntu0.8",
            "binary_name": "qemu-efi-arm"
        },
        {
            "binary_version": "2024.02-2ubuntu0.8",
            "binary_name": "qemu-efi-riscv64"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31790.json"

openssl

Package

Name: openssl
Purl: pkg:deb/ubuntu/openssl@3.0.13-0ubuntu3.9?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.0.13-0ubuntu3.9

Affected versions

3.*

3.0.10-1ubuntu2

3.0.10-1ubuntu2.1

3.0.10-1ubuntu3

3.0.10-1ubuntu4

3.0.13-0ubuntu2

3.0.13-0ubuntu3

3.0.13-0ubuntu3.1

3.0.13-0ubuntu3.2

3.0.13-0ubuntu3.3

3.0.13-0ubuntu3.4

3.0.13-0ubuntu3.5

3.0.13-0ubuntu3.6

3.0.13-0ubuntu3.7

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3.0.13-0ubuntu3.9",
            "binary_name": "libssl-dev"
        },
        {
            "binary_version": "3.0.13-0ubuntu3.9",
            "binary_name": "libssl3t64"
        },
        {
            "binary_version": "3.0.13-0ubuntu3.9",
            "binary_name": "openssl"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31790.json"

Ubuntu:25.10

edk2

Package

Name: edk2
Purl: pkg:deb/ubuntu/edk2@2025.02-8ubuntu3.1?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2025.*

2025.02-3ubuntu2

2025.02-8

2025.02-8ubuntu1

2025.02-8ubuntu2

2025.02-8ubuntu3

2025.02-8ubuntu3.1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2025.02-8ubuntu3.1",
            "binary_name": "efi-shell-aa64"
        },
        {
            "binary_version": "2025.02-8ubuntu3.1",
            "binary_name": "efi-shell-arm"
        },
        {
            "binary_version": "2025.02-8ubuntu3.1",
            "binary_name": "efi-shell-ia32"
        },
        {
            "binary_version": "2025.02-8ubuntu3.1",
            "binary_name": "efi-shell-loongarch64"
        },
        {
            "binary_version": "2025.02-8ubuntu3.1",
            "binary_name": "efi-shell-riscv64"
        },
        {
            "binary_version": "2025.02-8ubuntu3.1",
            "binary_name": "efi-shell-x64"
        },
        {
            "binary_version": "2025.02-8ubuntu3.1",
            "binary_name": "ovmf"
        },
        {
            "binary_version": "2025.02-8ubuntu3.1",
            "binary_name": "ovmf-ia32"
        },
        {
            "binary_version": "2025.02-8ubuntu3.1",
            "binary_name": "ovmf-inteltdx"
        },
        {
            "binary_version": "2025.02-8ubuntu3.1",
            "binary_name": "ovmf-legacy"
        },
        {
            "binary_version": "2025.02-8ubuntu3.1",
            "binary_name": "qemu-efi-aarch64"
        },
        {
            "binary_version": "2025.02-8ubuntu3.1",
            "binary_name": "qemu-efi-arm"
        },
        {
            "binary_version": "2025.02-8ubuntu3.1",
            "binary_name": "qemu-efi-loongarch64"
        },
        {
            "binary_version": "2025.02-8ubuntu3.1",
            "binary_name": "qemu-efi-riscv64"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31790.json"

openssl

Package

Name: openssl
Purl: pkg:deb/ubuntu/openssl@3.5.3-1ubuntu3.3?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.5.3-1ubuntu3.3

Affected versions

3.*

3.4.1-1ubuntu3

3.5.0-2ubuntu1

3.5.2-1ubuntu1

3.5.3-1ubuntu2

3.5.3-1ubuntu3

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3.5.3-1ubuntu3.3",
            "binary_name": "libssl-dev"
        },
        {
            "binary_version": "3.5.3-1ubuntu3.3",
            "binary_name": "libssl3t64"
        },
        {
            "binary_version": "3.5.3-1ubuntu3.3",
            "binary_name": "openssl"
        },
        {
            "binary_version": "3.5.3-1ubuntu3.3",
            "binary_name": "openssl-provider-legacy"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31790.json"

Ubuntu:Pro:FIPS-preview:22.04:LTS

openssl

Package

Name: openssl
Purl: pkg:deb/ubuntu/openssl@3.0.2-0ubuntu1.12+Fips1?arch=source&distro=fips-preview/jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.0.2-0ubuntu1.10+Fips1

3.0.2-0ubuntu1.12+Fips1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3.0.2-0ubuntu1.12+Fips1",
            "binary_name": "libssl-dev"
        },
        {
            "binary_version": "3.0.2-0ubuntu1.12+Fips1",
            "binary_name": "libssl3"
        },
        {
            "binary_version": "3.0.2-0ubuntu1.12+Fips1",
            "binary_name": "openssl"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31790.json"

openssl-fips

Package

Name: openssl-fips
Purl: pkg:deb/ubuntu/openssl-fips@3.0.5-0ubuntu0.1+Fips2.1?arch=source&distro=fips-preview/jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.0.5-0ubuntu0.1+Fips2.1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3.0.5-0ubuntu0.1+Fips2.1",
            "binary_name": "openssl-fips-module-3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31790.json"

Ubuntu:Pro:FIPS-updates:22.04:LTS

openssl

Package

Name: openssl
Purl: pkg:deb/ubuntu/openssl@3.0.2-0ubuntu1.21+Fips1?arch=source&distro=fips-updates/jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.0.2-0ubuntu1.10+Fips1

3.0.2-0ubuntu1.12+Fips1

3.0.2-0ubuntu1.14+Fips1

3.0.2-0ubuntu1.15+Fips1

3.0.2-0ubuntu1.16+Fips1

3.0.2-0ubuntu1.17+Fips1

3.0.2-0ubuntu1.18+Fips1

3.0.2-0ubuntu1.19+Fips1

3.0.2-0ubuntu1.20+Fips1

3.0.2-0ubuntu1.21+Fips1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3.0.2-0ubuntu1.21+Fips1",
            "binary_name": "libssl-dev"
        },
        {
            "binary_version": "3.0.2-0ubuntu1.21+Fips1",
            "binary_name": "libssl3"
        },
        {
            "binary_version": "3.0.2-0ubuntu1.21+Fips1",
            "binary_name": "openssl"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31790.json"

openssl-fips

Package

Name: openssl-fips
Purl: pkg:deb/ubuntu/openssl-fips@3.0.5-0ubuntu0.2+Fips1?arch=source&distro=fips-updates/jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.0.5-0ubuntu0.1+Fips2.1

3.0.5-0ubuntu0.2+Fips1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3.0.5-0ubuntu0.2+Fips1",
            "binary_name": "openssl-fips-module-3"
        },
        {
            "binary_version": "3.0.5-0ubuntu0.2+Fips1",
            "binary_name": "openssl-fips-module-3-dev"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31790.json"

Ubuntu:Pro:FIPS-updates:24.04:LTS

openssl-fips

Package

Name: openssl-fips
Purl: pkg:deb/ubuntu/openssl-fips@3.0.13-0ubuntu3.6+Fips1?arch=source&distro=fips-updates/noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.0.13-0ubuntu3+Fips1

3.0.13-0ubuntu3.6+Fips1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3.0.13-0ubuntu3.6+Fips1",
            "binary_name": "openssl-fips-module-3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31790.json"