Buffer Overflow Vulnerability in Dash by Red Hat
CVE-2026-102474

4MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 6
Vendor
CVE Published:
29 September 2026

What is CVE-2026-102474?

A buffer overflow issue has been identified in Dash, a shell command interpreter, where the printf built-in reserves insufficient memory for certain Unicode escape sequences. When a local user provides an escape token that requires more storage than allocated, it results in writing beyond the reserved memory. This vulnerability can potentially be exploited when a user executes printf or echo with the %b format specifier, particularly via dash -c or through positional arguments. Such exploitation may lead to unintended behavior in shell scripts and could compromise the integrity of system operations.

References

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

CVSS V3.1

Score:
4
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Shubham Raj (Causal Security) for reporting this issue.
.