CVE-2026-23474

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-23474
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 of memcmp() and remain within bounds.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/0b08be5aca212a99f8ba786fee4922feac08002c Patch
https://git.kernel.org/stable/c/2025b2d1f9d5cad6ea6fe85654c6c41297c3130b Patch
https://git.kernel.org/stable/c/75a4d8cfe7784f909b3bd69325abac8e04ecb385 Patch
https://git.kernel.org/stable/c/8e2f8020270af7777d49c2e7132260983e4fc566 Patch
https://git.kernel.org/stable/c/c4054ad2d8bff4e8e937cd4a1d1a04c1e8f77a2c Patch
https://git.kernel.org/stable/c/ca235d11fc2fd8fce1dcd9d732dc780be0cde2de Patch
https://git.kernel.org/stable/c/d8570211a2b1ec886a462daa0be4e9983ac768bb Patch
https://git.kernel.org/stable/c/e0065e106f798ce6862251bc4fc030ac5cead940 Patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
History

24 Jul 2026, 22:10

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: mtd: Evitar un fallo de arranque en el analizador de tablas de particiones RedBoot Dado CONFIG_FORTIFY_SOURCE=y y un compilador reciente, el commit 439a1bcac648 ('fortify: Usar __builtin_dynamic_object_size() cuando esté disponible') produce la advertencia a continuación y un oops. Buscando la tabla de particiones RedBoot en 50000000.flash en el desplazamiento 0x7e0000 ------------[ cut here ]------------ WARNING: lib/string_helpers.c:1035 at 0xc029e04c, CPU#0: swapper/0/1 memcmp: detectó desbordamiento de búfer: lectura de 15 bytes de un búfer de tamaño 14 Módulos enlazados: CPU: 0 UID: 0 PID: 1 Comm: swapper/0 No contaminado 6.19.0 #1 NONE Como dijo Kees, ''names' está apuntando a los 'namelen' bytes finales de la asignación ... 'namelen' podría ser básicamente de cualquier longitud.' Esta advertencia de fortify me parece legítima -- este código solía leer más allá del final de la asignación. Dado que el tamaño de la asignación dinámica se calcula con strlen(), podemos usar strcmp() en lugar de memcmp() y permanecer dentro de los límites.

14 Jul 2026, 13:18

Type Values Removed Values Added
References
  • () https://cert-portal.siemens.com/productcert/html/ssa-019113.html -
  • () https://cert-portal.siemens.com/productcert/html/ssa-082556.html -

26 May 2026, 14:24

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux
Linux linux Kernel
References () https://git.kernel.org/stable/c/0b08be5aca212a99f8ba786fee4922feac08002c - () https://git.kernel.org/stable/c/0b08be5aca212a99f8ba786fee4922feac08002c - Patch
References () https://git.kernel.org/stable/c/2025b2d1f9d5cad6ea6fe85654c6c41297c3130b - () https://git.kernel.org/stable/c/2025b2d1f9d5cad6ea6fe85654c6c41297c3130b - Patch
References () https://git.kernel.org/stable/c/75a4d8cfe7784f909b3bd69325abac8e04ecb385 - () https://git.kernel.org/stable/c/75a4d8cfe7784f909b3bd69325abac8e04ecb385 - Patch
References () https://git.kernel.org/stable/c/8e2f8020270af7777d49c2e7132260983e4fc566 - () https://git.kernel.org/stable/c/8e2f8020270af7777d49c2e7132260983e4fc566 - Patch
References () https://git.kernel.org/stable/c/c4054ad2d8bff4e8e937cd4a1d1a04c1e8f77a2c - () https://git.kernel.org/stable/c/c4054ad2d8bff4e8e937cd4a1d1a04c1e8f77a2c - Patch
References () https://git.kernel.org/stable/c/ca235d11fc2fd8fce1dcd9d732dc780be0cde2de - () https://git.kernel.org/stable/c/ca235d11fc2fd8fce1dcd9d732dc780be0cde2de - Patch
References () https://git.kernel.org/stable/c/d8570211a2b1ec886a462daa0be4e9983ac768bb - () https://git.kernel.org/stable/c/d8570211a2b1ec886a462daa0be4e9983ac768bb - Patch
References () https://git.kernel.org/stable/c/e0065e106f798ce6862251bc4fc030ac5cead940 - () https://git.kernel.org/stable/c/e0065e106f798ce6862251bc4fc030ac5cead940 - Patch
CWE NVD-CWE-noinfo
CPE cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*

18 Apr 2026, 09:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/ca235d11fc2fd8fce1dcd9d732dc780be0cde2de -
  • () https://git.kernel.org/stable/c/e0065e106f798ce6862251bc4fc030ac5cead940 -

03 Apr 2026, 16:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-03 16:16

Updated : 2026-07-24 22:10

NVD link : CVE-2026-23474

Mitre link : CVE-2026-23474

CVE.ORG link : CVE-2026-23474

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo