// For flags

CVE-2019-5595

FreeBSD Security Advisory - FreeBSD-SA-19:01.syscall

Severity Score

5.5
*CVSS v3

Exploit Likelihood

< 1%
*EPSS

Affected Versions

2
*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

In FreeBSD before 11.2-STABLE(r343782), 11.2-RELEASE-p9, 12.0-STABLE(r343781), and 12.0-RELEASE-p3, kernel callee-save registers are not properly sanitized before return from system calls, potentially allowing some kernel data used in the system call to be exposed.

En FreeBSD, en versiones anteriores a la 11.2-STABLE(r343782), 11.2-RELEASE-p9, 12.0-STABLE(r343781) y 12.0-RELEASE-p3, los registros callee-save del kernel no se sanean correctamente antes de volver de las llamadas del sistema, lo que podría permitir que se expongan algunos datos del kernel empleados en la llamada del sistema.

The callee-save registers are used by kernel and for some of them (%r8, %r10, and for non-PTI configurations, %r9) the content is not sanitized before return from syscalls, potentially leaking sensitive information. Typically an address of some kernel data structure used in the syscall implementation, is exposed.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2019-01-07 CVE Reserved
  • 2019-02-06 CVE Published
  • 2024-08-04 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-459: Incomplete Cleanup
CAPEC
References (2)
URL Date SRC
URL Date SRC
Affected Vendors, Products, and Versions (2)