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Public proof of concept

CVE-2019-25656

A public proof of concept exists; no exploitation attested.

  • Published2026-04-05
  • WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-04-0521:16CVE publishedNVD

Versions per branch

Products declared by the CNA1 product

As VulnCheck, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • R-Project R i386
    Affected
    • = 3.5.0no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-04-05

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • r-baseUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • r-baseUbuntu:Pro:14.04:LTSall versions · no fixed version listed
  • r-baseUbuntu:26.10all versions · no fixed version listed
  • r-baseUbuntu:26.04:LTSall versions · no fixed version listed
  • r-baseUbuntu:25.10all versions · no fixed version listed
  • r-baseUbuntu:24.04:LTSall versions · no fixed version listed
  • r-baseUbuntu:22.04:LTSall versions · no fixed version listed
  • r-baseUbuntu:20.04:LTSall versions · no fixed version listed

1 more package range on OSV.dev

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionpoc2026-04-06
  • CNACVSS 4.08.6known since 2026-10-23
  • CNACVSS 3.18.4known since 2026-10-23
  • CNAweakness (CWE)CWE-787known since 2026-10-23
  • FIRST EPSSEPSS score0.2 %2026-11-08
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 vector
CVSS: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
Published
2026-04-05
Last Modified
2026-07-24
NVD status
Deferred
GitHub Advisory
GHSA-j848-jmr8-xfgr

Frequently asked questions

What is CVE-2019-25656?

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.

Is CVE-2019-25656 actively exploited?

A proof-of-concept exploit exists for CVE-2019-25656, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2019-25656?

CVE-2019-25656 has a CVSS v3 base score of 8.4 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record