UBUNTU-CVE-2026-6727

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Source
https://ubuntu.com/security/CVE-2026-6727
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6727.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-6727
Upstream
  • CVE-2026-6727
Published
2026-08-13T00:00:00Z
Modified
2026-08-13T19:30:30.704171356Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A timing side-channel vulnerability exists in the RSA OAEP decryption implementation. A privileged local attacker with access to the TPM command interface may be able to exploit timing differences to recover information that could allow decryption of ciphertexts encrypted to TPM-managed RSA keys, including the RSA Endorsement Key (EK), including import blobs, credential blobs, and session salts. Under certain conditions, this may also enable the forgery of TPM 2.0 attestations. Refer to TCGVRT0011.

References

Affected packages

Ubuntu:22.04:LTS / libtpms

Package

Name
libtpms
Purl
pkg:deb/ubuntu/libtpms?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.8.2-1ubuntu1
0.9.0-0ubuntu1
0.9.0-0ubuntu2
0.9.0-0ubuntu3
0.9.0-0ubuntu4
0.9.3-0ubuntu1
0.9.3-0ubuntu1.22.04.1
0.9.3-0ubuntu1.22.04.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.9.3-0ubuntu1.22.04.2",
            "binary_name": "libtpms0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6727.json"

Ubuntu:24.04:LTS / libtpms

Package

Name
libtpms
Purl
pkg:deb/ubuntu/libtpms?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.9.3-0ubuntu2
0.9.3-0ubuntu3
0.9.3-0ubuntu4
0.9.3-0ubuntu4.24.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.9.3-0ubuntu4.24.04.1",
            "binary_name": "libtpms0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6727.json"

Ubuntu:26.04:LTS / libtpms

Package

Name
libtpms
Purl
pkg:deb/ubuntu/libtpms?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.9.3-0ubuntu5
0.10.1-2ubuntu1
0.10.2-1ubuntu1
0.10.2-2ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.10.2-2ubuntu1",
            "binary_name": "libtpms0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6727.json"