FreeBSD Kernel operator precedence logic error

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in FreeBSD. This affects an unknown function of the component Kernel. This manipulation causes operator precedence logic error. This vulnerability is tracked as CVE-2026-7270. The attack is restricted to local execution. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in FreeBSD (version now known) and classified as critical. Affected by this vulnerability is some unknown processing of the component Kernel. The manipulation with an unknown input leads to a operator precedence logic error vulnerability. The CWE definition for the vulnerability is CWE-783. The product uses an expression in which operator precedence causes incorrect logic to be used. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An operator precedence bug in the kernel results in a scenario where a buffer overflow causes attacker-controlled data to overwrite adjacent execve(2) argument buffers. The bug may be exploitable by an unprivileged user to obtain superuser privileges.

The weakness was disclosed by Ryan Austin. It is possible to read the advisory at security.freebsd.org. This vulnerability is known as CVE-2026-7270 since 04/28/2026. The exploitation appears to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/01/2026).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1324). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • FreeBSD Project FreeBSD OS

Productinfo

Type

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
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: Operator precedence logic error
CWE: CWE-783
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/28/2026 CVE reserved
04/30/2026 +2 days Advisory disclosed
04/30/2026 +0 days VulDB entry created
05/01/2026 +1 days VulDB entry last update

Sourcesinfo

Product: freebsd.org

Advisory: security.freebsd.org
Researcher: Ryan Austin
Status: Confirmed

CVE: CVE-2026-7270 (🔒)
GCVE (CVE): GCVE-0-2026-7270
GCVE (VulDB): GCVE-100-360247
CERT Bund: WID-SEC-2026-1324 - FreeBSD Project FreeBSD OS: Mehrere Schwachstellen

Entryinfo

Created: 04/30/2026 10:01
Updated: 05/01/2026 05:16
Changes: 04/30/2026 10:01 (54), 05/01/2026 05:16 (7)
Complete: 🔍
Cache ID: 216::103

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

Discussion

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