VDB-392990 · CVE-2026-58081 · GCVE-0-2026-58081

FreeBSD iconv up to p0.x/p6/p10/p15 Encoding Modules buffer overflow

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7.0	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in FreeBSD iconv up to p0.x/p6/p10/p15. This issue affects some unknown processing of the component Encoding Modules. Such manipulation leads to buffer overflow. This vulnerability is referenced as CVE-2026-58081. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in FreeBSD iconv up to p0.x/p6/p10/p15 and classified as critical. Affected by this issue is an unknown part of the component Encoding Modules. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Several encoding modules, including HZ, UTF-7, VIQR, and ZW, did not properly check the size of the caller-supplied output buffer before writing converted characters. An application that uses iconv(3) to convert untrusted input to or from one of the affected encodings may be vulnerable to buffer overflows if it uses one of the affected encoding modules.

The advisory is available at security.freebsd.org. This vulnerability is handled as CVE-2026-58081 since 06/29/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available.

Upgrading to version p1, p7, p11 or p16 eliminates this vulnerability.

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Productinfo

Type

Operating System

Vendor

FreeBSD

Name

iconv

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: iconv p1/p7/p11/p16

Timelineinfo

06/29/2026 CVE reserved
08/19/2026 +51 days Advisory disclosed
08/19/2026 +0 days VulDB entry created
08/19/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: security.freebsd.org
Status: Confirmed

CVE: CVE-2026-58081 (🔒)
GCVE (CVE): GCVE-0-2026-58081
GCVE (VulDB): GCVE-100-392990

Entryinfo

Created: 08/19/2026 09:34
Changes: 08/19/2026 09:34 (55)
Complete: 🔍
Cache ID: 216::103