CVE-2026-23474

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

mtd: Avoid boot crash in RedBoot partition table parser

Given CONFIG_FORTIFY_SOURCE=y and a recent compiler,

commit 439a1bcac648 ("fortify: Use __builtin_dynamic_object_size() when

available") produces the warning below and an oops.

Searching for RedBoot partition table in 50000000.flash at offset 0x7e0000

------------[ cut here ]------------

WARNING: lib/string_helpers.c:1035 at 0xc029e04c, CPU#0: swapper/0/1

memcmp: detected buffer overflow: 15 byte read of buffer size 14

Modules linked in:

CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.19.0 #1 NONE

As Kees said, "'names' is pointing to the final 'namelen' many bytes

of the allocation ... 'namelen' could be basically any length at all.

This fortify warning looks legit to me -- this code used to be reading

beyond the end of the allocation."

Since the size of the dynamic allocation is calculated with strlen()

we can use strcmp() instead

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References