CVE-2026-102474 — Dash: dash: heap out-of-bounds write in conv_escape via undersized unicode escape reservation
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 w…
Published: 2026-09-29 · CVSS: 4.0 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7