CVE-2024-26844

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-26844
In the Linux kernel, the following vulnerability has been resolved: block: Fix WARNING in _copy_from_iter Syzkaller reports a warning in _copy_from_iter because an iov_iter is supposedly used in the wrong direction. The reason is that syzcaller managed to generate a request with a transfer direction of SG_DXFER_TO_FROM_DEV. This instructs the kernel to copy user buffers into the kernel, read into the copied buffers and then copy the data back to user space. Thus the iovec is used in both directions. Detect this situation in the block layer and construct a new iterator with the correct direction for the copy-in.

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/0f1bae071de9967602807472921829a54b2e5956 Patch
https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6 Patch
https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75b Patch
https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1b Patch
https://git.kernel.org/stable/c/0f1bae071de9967602807472921829a54b2e5956 Patch
https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6 Patch
https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75b Patch
https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1b Patch
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:6.8:rc1:*:*:*:*:*:*
History

02 Apr 2025, 13:17

Type Values Removed Values Added
CWE NVD-CWE-noinfo
First Time Linux linux Kernel
Linux
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/0f1bae071de9967602807472921829a54b2e5956 - () https://git.kernel.org/stable/c/0f1bae071de9967602807472921829a54b2e5956 - Patch
References () https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6 - () https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6 - Patch
References () https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75b - () https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75b - Patch
References () https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1b - () https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1b - Patch
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5

21 Nov 2024, 09:03

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bloque: Reparar ADVERTENCIA en _copy_from_iter Syzkaller informa una advertencia en _copy_from_iter porque supuestamente se usa un iov_iter en la dirección incorrecta. La razón es que syzcaller logró generar una solicitud con una dirección de transferencia de SG_DXFER_TO_FROM_DEV. Esto le indica al kernel que copie los buffers del usuario en el kernel, los lea en los buffers copiados y luego copie los datos nuevamente al espacio del usuario. Por tanto, el iovec se utiliza en ambas direcciones. Detecte esta situación en la capa de bloque y construya un nuevo iterador con la dirección correcta para la copia.
References () https://git.kernel.org/stable/c/0f1bae071de9967602807472921829a54b2e5956 - () https://git.kernel.org/stable/c/0f1bae071de9967602807472921829a54b2e5956 -
References () https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6 - () https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6 -
References () https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75b - () https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75b -
References () https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1b - () https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1b -

17 Apr 2024, 12:48

Type Values Removed Values Added
New CVE
Information

Published : 2024-04-17 10:15

Updated : 2025-04-02 13:17

NVD link : CVE-2024-26844

Mitre link : CVE-2024-26844

CVE.ORG link : CVE-2024-26844

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo