CVE-2019-25656

R i386 3.5.0 Local Buffer Overflow SEH

8.6 High

R i386 3.5.0 contains a local buffer overflow vulnerability in the GUI Preferences dialog that allows local attackers to trigger a structured exception handler (SEH) overwrite by supplying malicious input. Attackers can craft a payload string in the 'Language for menus and messages' field to overwrite SEH records and achieve code execution with calculator or arbitrary shellcode.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.17%Up 0.2 points since Apr 6, 2026

What each source reports

CVE List Score used 8.6

R i386 3.5.0 Local Buffer Overflow SEH

Record: CVE-2019-25656
CVSS 4.0: 8.6 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

EUVDEUVD-2019-20048 8.6

Record: EUVD-2019-20048
CVSS 4.0: 8.6 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-j848-jmr8-xfgr 8.6

R i386 3.5.0 contains a local buffer overflow vulnerability in the GUI Preferences dialog that...

Record: GHSA-j848-jmr8-xfgr
CVSS 4.0: 8.6 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

NVD 8.6

Record: CVE-2019-25656
CVSS 4.0: 8.6 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

OSVUBUNTU-CVE-2019-25656 8.6

Record: UBUNTU-CVE-2019-25656
CVSS 4.0: 8.6 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

r-project r i386

Affected packages

Affected packages
Package	Affected	Fixed
`r-base` Ubuntu:Pro:14.04:LTS	All versions, plus listed versions 3.0.1-3ubuntu13.0.2-1ubuntu13.0.2-1ubuntu1.1~esm2	None known
`r-base` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 3.2.2-13.2.2.20151203-13.2.3-13.2.3-23.2.3-43.2.3-4ubuntu0.1~esm3	None known
`r-base` Ubuntu:18.04:LTS	All versions, plus listed versions 3.4.2-1ubuntu13.4.2-1ubuntu23.4.2-2ubuntu13.4.3-13.4.3-1build13.4.4-13.4.4-1ubuntu1	None known
`r-base` Ubuntu:20.04:LTS	All versions, plus listed versions 3.6.1-43.6.1-73.6.2-23.6.2.20200221-13.6.2.20200221-1build13.6.3-2	None known
`r-base` Ubuntu:22.04:LTS	All versions, plus listed versions 4.0.4-1build14.1.2-1ubuntu14.1.2-1ubuntu2	None known
`r-base` Ubuntu:24.04:LTS	All versions, plus listed versions 4.3.1-44.3.2-14.3.2-1build14.3.3-2build14.3.3-2build2	None known
`r-base` Ubuntu:25.10	All versions, plus listed versions 4.4.3-14.5.0-34.5.1-1	None known
`r-base` Ubuntu:26.10	All versions, plus listed versions 4.5.2-1ubuntu24.6.0-54.6.1-14.6.1-44.6.1-5	None known
`r-base` Ubuntu:26.04:LTS	All versions, plus listed versions 4.5.1-14.5.2-14.5.2-1ubuntu14.5.2-1ubuntu2	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-25656 is a high vulnerability (CVSS 8.6) in R-project R I386, published April 5, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.17%, the 5th percentile. No source names a fixed version.