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Fencer Vulns
critical 9.8

CVE-2023-36328 json

Integer Overflow vulnerability in mp_grow in libtom libtommath before commit beba892bc0d4e4ded4d667ab1d2a94f4d75109a9, allows attackers to…

published 2023-09-01 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-40296

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 69%
public exploits
0
none known

Summary

Integer Overflow vulnerability in mp_grow in libtom libtommath before commit beba892bc0d4e4ded4d667ab1d2a94f4d75109a9, allows attackers to execute arbitrary code and cause a denial of service (DoS).

Patch / fix

  • libtom libtommath 1.2.1
  • libtommath Debian 12 1.2.0-6+deb12u1
  • libtommath Debian 14, Debian 13 1.2.1-1

debian advisories DEBIAN-CVE-2023-36328

  • libtommath Ubuntu 20.04 LTS 1.2.0-3ubuntu0.1
  • libtommath Ubuntu 22.04 LTS 1.2.0-6ubuntu0.22.04.1
  • libtommath Ubuntu Pro 16.04 LTS 0.42.0-1.2ubuntu0.1~esm1
  • libtommath Ubuntu Pro 18.04 LTS 1.0.1-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2023-36328

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libtommath Alpine 3.24, Alpine 3.23 1.2.1-r0

alpine advisories ALPINE-CVE-2023-36328

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • tcl CBL-Mariner 2.0 8.6.13-2
  • libtommath CBL-Mariner 2.0, Azure Linux 3.0 1.1.0-5
  • tcl Azure Linux 3.0 8.6.13-3

azure linux advisories AZL-28627AZL-28639AZL-35296AZL-36959

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-36328 updated

libtommath: Integer Overflow vulnerability in mp_grow in libtom

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
2 y ago

Exploit prediction

1.26% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.