High severity · published Apr 30, 2026
CVE-2026-7270
Local privilege escalation via execve()
7.8
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
FreeBSD · FreeBSD
15.0-RELEASE before p7; 14.4-RELEASE before p3; 14.3-RELEASE before p12; 13.5-RELEASE before p13 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-7270
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-7270
Vendor Advisory
https://security.freebsd.org/advisories/FreeBSD-SA-26:13.exec.asc
blog.calif.io
https://blog.calif.io/p/cve-2026-7270-how-i-get-root-on-freebsd
news.ycombinator.com
https://news.ycombinator.com/item?id=48077971
More from FreeBSD
10.0
CVE-2024-43102
umtx Kernel panic or Use-After-Free
10.0
CVE-2018-17160
In FreeBSD before 11.2-STABLE(r341486) and 11.2-RELEASE-p6, insufficient bounds checking in one of the device models provided by bhyve can permit a guest operating system to…
9.8
CVE-2026-101306
Multiple jail filesystem root escapes
9.8
CVE-2026-58082
Stack based buffer overflow in iconv(3)
9.8
CVE-2026-58081
Heap based buffer overflow in iconv(3)