UBUNTU-CVE-2026-87733

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-87733
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87733.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-87733
Upstream
  • CVE-2026-87733
Published
2026-09-09T05:18:00Z
Modified
2026-09-16T14:03:37Z
Severity
  • 6.2 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An issue was discovered in the mirage-crypto-ec function before 2.2.0 for OCaml. The ECDSA functions {P256,P384,P521}.Dsa.pub_of_octets accept 0x00, the encoding of the point at infinity, as a public key. With that public key, signatures can be forged without a private key.

References

Affected packages

Ubuntu:22.04:LTS / ocaml-mirage-crypto

Package

Name
ocaml-mirage-crypto
Purl
pkg:deb/ubuntu/ocaml-mirage-crypto?arch=source&distro=jammy

Affected ranges

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

Affected versions

0.*
0.10.5-4
0.10.5-4build2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libmirage-crypto-ocaml",
            "binary_version":  "0.10.5-4build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87733.json"

Ubuntu:24.04:LTS / ocaml-mirage-crypto

Package

Name
ocaml-mirage-crypto
Purl
pkg:deb/ubuntu/ocaml-mirage-crypto?arch=source&distro=noble

Affected ranges

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

Affected versions

0.*
0.11.1-3
0.11.2-1
0.11.2-1build1
0.11.2-2build3

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libmirage-crypto-ocaml",
            "binary_version":  "0.11.2-2build3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87733.json"

Ubuntu:26.04:LTS / ocaml-mirage-crypto

Package

Name
ocaml-mirage-crypto
Purl
pkg:deb/ubuntu/ocaml-mirage-crypto?arch=source&distro=resolute

Affected ranges

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

Affected versions

2.*
2.0.1-1build1
2.0.2-1build1
2.0.2-1build2
2.0.2-1build3
2.0.2-1build5

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libmirage-crypto-ocaml",
            "binary_version":  "2.0.2-1build5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87733.json"