CVE-2025-40913

Net::Dropbear versions through 0.16 for Perl contains a dependency that may be susceptible to an integer overflow

6.5 MediumFix available

Net::Dropbear versions through 0.16 for Perl contains a dependency that may be susceptible to an integer overflow.

Net::Dropbear embeds a version of the libtommath library that is susceptible to an integer overflow associated with CVE-2023-36328.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

0.33%Up 0.3 points since Jul 17, 2025

What each source reports

CVE List Score used 6.5

Net::Dropbear versions through 0.16 for Perl contains a dependency that may be susceptible to an integer overflow

Net::Dropbear versions through 0.16 for Perl contains a dependency that may be susceptible to an integer overflow.

Net::Dropbear embeds a version of the libtommath library that is susceptible to an integer overflow associated with CVE-2023-36328.

Record: CVE-2025-40913
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness: CWE-1395
Updated: 2026-11-02

EUVDEUVD-2025-21701 6.5

Net::Dropbear versions through 0.16 for Perl contains a dependency that may be susceptible to an integer overflow.

Net::Dropbear embeds a version of the libtommath library that is susceptible to an integer overflow associated with CVE-2023-36328.

Record: EUVD-2025-21701
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-x86q-3xjx-wg89 6.5

Net::Dropbear versions through 0.16 for Perl contains a dependency that may be susceptible to an...

Net::Dropbear versions through 0.16 for Perl contains a dependency that may be susceptible to an integer overflow.

Net::Dropbear embeds a version of the libtommath library that is susceptible to an integer overflow associated with CVE-2023-36328.

Record: GHSA-x86q-3xjx-wg89
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Updated: 2026-11-02

NVD 6.5

Net::Dropbear versions through 0.16 for Perl contains a dependency that may be susceptible to an integer overflow.

Net::Dropbear embeds a version of the libtommath library that is susceptible to an integer overflow associated with CVE-2023-36328.

Record: CVE-2025-40913
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Updated: 2026-11-02

OSV 6.5

Net::Dropbear versions through 0.16 for Perl contains a dependency that may be susceptible to an integer overflow

Net::Dropbear versions through 0.16 for Perl contains a dependency that may be susceptible to an integer overflow.

Net::Dropbear embeds a version of the libtommath library that is susceptible to an integer overflow associated with CVE-2023-36328.

Record: CVE-2025-40913
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness: CWE-1395
Updated: 2026-11-02

OSVCVE-2025-40914 9.8

Perl CryptX before version 0.087 contains a dependency that may be susceptible to an integer overflow

Perl CryptX before version 0.087 contains a dependency that may be susceptible to an integer overflow.

CryptX embeds a version of the libtommath library that is susceptible to an integer overflow associated with CVE-2023-36328.

Record: CVE-2025-40914
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-1395
Updated: 2026-11-02

OSVAZL-65547 No score

CVE-2025-40913 affecting package libtommath 1.3.1~rc1-3

Net::Dropbear versions through 0.16 for Perl contains a dependency that may be susceptible to an integer overflow.

Net::Dropbear embeds a version of the libtommath library that is susceptible to an integer overflow associated with CVE-2023-36328.

Record: AZL-65547
Updated: 2026-11-05

OSVAZL-65550 No score

CVE-2025-40913 affecting package samba 4.18.3-2

Net::Dropbear versions through 0.16 for Perl contains a dependency that may be susceptible to an integer overflow.

Net::Dropbear embeds a version of the libtommath library that is susceptible to an integer overflow associated with CVE-2023-36328.

Record: AZL-65550
Updated: 2026-11-05

OSVAZL-65571 No score

CVE-2025-40913 affecting package tcl for versions less than 8.6.13-2

Net::Dropbear versions through 0.16 for Perl contains a dependency that may be susceptible to an integer overflow.

Net::Dropbear embeds a version of the libtommath library that is susceptible to an integer overflow associated with CVE-2023-36328.

Record: AZL-65571
Updated: 2026-11-05

Affected products

atrodo net::dropbear

Affected packages

Affected packages
Package	Affected	Fixed
`libtommath` Azure Linux:3	through 1.3.1~rc1-3	None known
`samba` Azure Linux:3	through 4.18.3-2	None known
`tcl` Azure Linux:3	before 8.6.13-2	8.6.13-2

History

History
Recorded	Changed	Sources
Nov 5, 2026	facts	OSV
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-40913 is a medium vulnerability (CVSS 6.5) in Atrodo Net::dropbear, published June 11, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 25th percentile. Fixed in tcl 8.6.13-2.

References

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