Published:2026/10/20  Last Updated:2026/10/20

JVN#29783594
UnRTF vulnerable to out-of-bounds write

Overview

UnRTF by GNU Project contains an out-of-bounds write vulnerability.

Products Affected

  • UnRTF versions prior to 0.21.12

Description

UnRTF by GNU Project contains the following vulnerability:

  • Out-of-bounds Write (CWE-787)
    • CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N Base Score 5.1
    • CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L Base Score 5.4
    • CVE-2026-109831

Impact

If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.

Solution

Update the software
Update the software to the latest version according to the information provided by the developer.

Vendor Status

Vendor Link
GNU Project unrtf 0.21.12

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Credit

Naoki Wakamatsu reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Alert
JPCERT Reports
CERT Advisory
CPNI Advisory
TRnotes
CVE CVE-2026-109831
JVN iPedia JVNDB-2026-000152