Local privilege escalation via execve()
Summary
| CVE | CVE-2026-7270 |
|---|---|
| State | PUBLISHED |
| Assigner | freebsd |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-04-30 07:16:41 UTC |
| Updated | 2026-05-10 08:16:08 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from ADP
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.000130000 probability, percentile 0.021910000 (date 2026-05-12)
Problem Types: CWE-783 | CWE-783 CWE-783: Operator Precedence Logic Error
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | DECLARED | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Freebsd | Freebsd | 13.5 | - | All | All |
| Operating System | Freebsd | Freebsd | 13.5 | beta3 | All | All |
| Operating System | Freebsd | Freebsd | 13.5 | p1 | All | All |
| Operating System | Freebsd | Freebsd | 13.5 | p10 | All | All |
| Operating System | Freebsd | Freebsd | 13.5 | p11 | All | All |
| Operating System | Freebsd | Freebsd | 13.5 | p12 | All | All |
| Operating System | Freebsd | Freebsd | 13.5 | p2 | All | All |
| Operating System | Freebsd | Freebsd | 13.5 | p3 | All | All |
| Operating System | Freebsd | Freebsd | 13.5 | p4 | All | All |
| Operating System | Freebsd | Freebsd | 13.5 | p5 | All | All |
| Operating System | Freebsd | Freebsd | 13.5 | p6 | All | All |
| Operating System | Freebsd | Freebsd | 13.5 | p7 | All | All |
| Operating System | Freebsd | Freebsd | 13.5 | p8 | All | All |
| Operating System | Freebsd | Freebsd | 13.5 | p9 | All | All |
| Operating System | Freebsd | Freebsd | 14.3 | - | All | All |
| Operating System | Freebsd | Freebsd | 14.3 | p1 | All | All |
| Operating System | Freebsd | Freebsd | 14.3 | p10 | All | All |
| Operating System | Freebsd | Freebsd | 14.3 | p11 | All | All |
| Operating System | Freebsd | Freebsd | 14.3 | p2 | All | All |
| Operating System | Freebsd | Freebsd | 14.3 | p3 | All | All |
| Operating System | Freebsd | Freebsd | 14.3 | p4 | All | All |
| Operating System | Freebsd | Freebsd | 14.3 | p5 | All | All |
| Operating System | Freebsd | Freebsd | 14.3 | p6 | All | All |
| Operating System | Freebsd | Freebsd | 14.3 | p7 | All | All |
| Operating System | Freebsd | Freebsd | 14.3 | p8 | All | All |
| Operating System | Freebsd | Freebsd | 14.3 | p9 | All | All |
| Operating System | Freebsd | Freebsd | 14.4 | - | All | All |
| Operating System | Freebsd | Freebsd | 14.4 | p1 | All | All |
| Operating System | Freebsd | Freebsd | 14.4 | p2 | All | All |
| Operating System | Freebsd | Freebsd | 14.4 | rc1 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | - | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p1 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p2 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p3 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p4 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p5 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p6 | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | FreeBSD | FreeBSD | affected 15.0-RELEASE p7 release | Not specified |
| CNA | FreeBSD | FreeBSD | affected 14.4-RELEASE p3 release | Not specified |
| CNA | FreeBSD | FreeBSD | affected 14.3-RELEASE p12 release | Not specified |
| CNA | FreeBSD | FreeBSD | affected 13.5-RELEASE p13 release | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| blog.calif.io/p/cve-2026-7270-how-i-get-root-on-freebsd | af854a3a-2127-422b-91ae-364da2661108 | blog.calif.io | |
| security.freebsd.org/advisories/FreeBSD-SA-26:13.exec.asc | [email protected] | security.freebsd.org | Vendor Advisory |
| news.ycombinator.com/item | af854a3a-2127-422b-91ae-364da2661108 | news.ycombinator.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Ryan Austin of Calif.io (en)
There are currently no legacy QID mappings associated with this CVE.