CVE-2026-102474

MEDIUMCVSS 4.0

Description

A flaw was found in dash. The printf builtin reserves four bytes before converting a Unicode \u or \U escape, but the multi-byte token can need five or six bytes. A local user who can supply such an escape to dash printf or echo %b, including through dash -c and a positional argument, can write one or two bytes past that reservation.

Timeline

Published:September 29th, 2026 10:17 AM

Last modified:November 5th, 2026 5:17 PM

CVSS Scoring

CVSS v3: 4.0 (MEDIUM)

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weaknesses (CWE)

CWE-787

References & Reports

Advisories, patches, and third-party reports

https://access.redhat.com/security/cve/CVE-2026-102474
https://bugzilla.redhat.com/show_bug.cgi?id=2543004

Source: NIST NVD · Data may lag official sources by up to one minute