Home/CVE/An operator precedence bug in the kernel results in a scenario where a buffer overflow causes attacker-controlled data t
CVE

CVE-2026-7270

An operator precedence bug in the kernel results in a scenario where a buffer overflow causes attacker-controlled data t

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.

HIGH · CVSS 7.8 EPSS 8e-05
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-783Operator Precedence Logic Error
▤

Affected Products & Versions

1
freebsdall versions
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · secteam@freebsd.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD30 Apr 2026 · 07:16 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://security.freebsd.org/advisories/FreeBSD-SA-26:13.exec.ascVendor Advisory
https://blog.calif.io/p/cve-2026-7270-how-i-get-root-on-freebsd
https://news.ycombinator.com/item?id=48077971
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