FreeBSD hwpmc up to p2/p8/p12 privileges management

CVSS Meta Temp Score
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CTI Interest Score
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3.2$0-$5k0.93+

Summaryinfo

A vulnerability identified as problematic has been detected in FreeBSD hwpmc up to p2/p8/p12. This issue affects some unknown processing. The manipulation leads to privileges management. This vulnerability is listed as CVE-2026-58089. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability was found in FreeBSD hwpmc up to p2/p8/p12 and classified as problematic. This issue affects some unknown functionality. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality. The summary by CVE is:

When a process calls execve(2) to execute a setuid or setgid image, hwpmc(4) is supposed to detach PMCs owned by unprivileged processes. An inverted check meant that this scenario was not handled properly. An unprivileged local user who has attached PMCs to a process can continue monitoring it after the process executes a setuid or setgid binary, contrary to the intended policy.

It is possible to read the advisory at security.freebsd.org. The identification of this vulnerability is CVE-2026-58089 since 06/29/2026. The exploitation is known to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Upgrading to version p3, p9 or p13 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-66234). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: hwpmc p3/p9/p13

Timelineinfo

06/29/2026 CVE reserved
08/26/2026 +58 days Advisory disclosed
08/26/2026 +0 days VulDB entry created
08/26/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: security.freebsd.org
Status: Confirmed

CVE: CVE-2026-58089 (🔒)
GCVE (CVE): GCVE-0-2026-58089
GCVE (VulDB): GCVE-100-395663
EUVD: 🔒

Entryinfo

Created: 08/26/2026 06:53
Updated: 08/26/2026 08:07
Changes: 08/26/2026 06:53 (54), 08/26/2026 08:07 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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