CVE-2026-102474
Dash: dash: heap out-of-bounds write in conv_escape via undersized unicode escape reservation
- State
- Published
- Severity
- 4.0 Medium
- Published
- Sep 29, 2026
- Updated
- Sep 29, 2026
- Reserved
- Sep 29, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.0 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | redhat |
Weaknesses
- CWE-787 Out-of-bounds Write
Affected Products
| Product | Versions |
|---|---|
Red Hat Enterprise Linux 6Red Hat |
References
- https://access.redhat.com/security/cve/CVE-2026-102474vdb-entry
- RHBZ#2543004issue-tracking
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