CVE-2026-43502

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-43502
In the Linux kernel, the following vulnerability has been resolved: net/rds: handle zerocopy send cleanup before the message is queued A zerocopy send can fail after user pages have been pinned but before the message is attached to the sending socket. The purge path currently infers zerocopy state from rm->m_rs, so an unqueued message can be cleaned up as if it owned normal payload pages. However, zerocopy ownership is really determined by the presence of op_mmp_znotifier, regardless of whether the message has reached the socket queue. Capture op_mmp_znotifier up front in rds_message_purge() and use it as the cleanup discriminator. If the message is already associated with a socket, keep the existing completion path. Otherwise, drop the pinned page accounting directly and release the notifier before putting the payload pages. This keeps early send failure cleanup consistent with the zerocopy lifetime rules without changing the normal queued completion path.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/0f5c185fc79a59ee9991234dd6d2a3e5afa6e75b Patch
https://git.kernel.org/stable/c/14ef6fd18db2494098b21e0471bf27a1d8e9993e Patch
https://git.kernel.org/stable/c/1e262db7675e27f42c3f3f47d6011855f4454f24 Patch
https://git.kernel.org/stable/c/21d70744e6d3bbf9293aa1ee6fba7c53ad75275e Patch
https://git.kernel.org/stable/c/3abc8983b2bae3f487f77d9da5527d7d6b210d46 Patch
https://git.kernel.org/stable/c/44b550d88b267320459d518c0743a241ab2108fa Patch
https://git.kernel.org/stable/c/46662f7dc59475995609bf3e9d27eb36f4acf26f Patch
https://git.kernel.org/stable/c/e9aefdc5c53fe9aed108c14e3d155710a1bb14c9 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:*:*:*:*:*:*:*:*
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:7.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
History

23 Jul 2026, 16:10

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: net/rds: manejar la limpieza de envío de zerocopy antes de que el mensaje sea encolado Un envío zerocopy puede fallar después de que las páginas de usuario hayan sido fijadas pero antes de que el mensaje sea adjuntado al socket de envío. La ruta de purga actualmente infiere el estado zerocopy de rm->m_rs, por lo que un mensaje no encolado puede ser limpiado como si poseyera páginas de carga útil normales. Sin embargo, la propiedad zerocopy es realmente determinada por la presencia de op_mmp_znotifier, independientemente de si el mensaje ha llegado a la cola del socket. Capturar op_mmp_znotifier de antemano en rds_message_purge() y usarlo como discriminador de limpieza. Si el mensaje ya está asociado con un socket, mantener la ruta de finalización existente. De lo contrario, descartar la contabilidad de páginas fijadas directamente y liberar el notificador antes de colocar las páginas de carga útil. Esto mantiene la limpieza temprana de fallos de envío consistente con las reglas de vida útil de zerocopy sin cambiar la ruta de finalización encolada normal.

26 Jun 2026, 17:28

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/0f5c185fc79a59ee9991234dd6d2a3e5afa6e75b - () https://git.kernel.org/stable/c/0f5c185fc79a59ee9991234dd6d2a3e5afa6e75b - Patch
References () https://git.kernel.org/stable/c/14ef6fd18db2494098b21e0471bf27a1d8e9993e - () https://git.kernel.org/stable/c/14ef6fd18db2494098b21e0471bf27a1d8e9993e - Patch
References () https://git.kernel.org/stable/c/1e262db7675e27f42c3f3f47d6011855f4454f24 - () https://git.kernel.org/stable/c/1e262db7675e27f42c3f3f47d6011855f4454f24 - Patch
References () https://git.kernel.org/stable/c/21d70744e6d3bbf9293aa1ee6fba7c53ad75275e - () https://git.kernel.org/stable/c/21d70744e6d3bbf9293aa1ee6fba7c53ad75275e - Patch
References () https://git.kernel.org/stable/c/3abc8983b2bae3f487f77d9da5527d7d6b210d46 - () https://git.kernel.org/stable/c/3abc8983b2bae3f487f77d9da5527d7d6b210d46 - Patch
References () https://git.kernel.org/stable/c/44b550d88b267320459d518c0743a241ab2108fa - () https://git.kernel.org/stable/c/44b550d88b267320459d518c0743a241ab2108fa - Patch
References () https://git.kernel.org/stable/c/46662f7dc59475995609bf3e9d27eb36f4acf26f - () https://git.kernel.org/stable/c/46662f7dc59475995609bf3e9d27eb36f4acf26f - Patch
References () https://git.kernel.org/stable/c/e9aefdc5c53fe9aed108c14e3d155710a1bb14c9 - () https://git.kernel.org/stable/c/e9aefdc5c53fe9aed108c14e3d155710a1bb14c9 - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
CWE NVD-CWE-noinfo
First Time Linux linux Kernel
Linux

01 Jun 2026, 17:17

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/1e262db7675e27f42c3f3f47d6011855f4454f24 -
  • () https://git.kernel.org/stable/c/46662f7dc59475995609bf3e9d27eb36f4acf26f -
  • () https://git.kernel.org/stable/c/e9aefdc5c53fe9aed108c14e3d155710a1bb14c9 -

30 May 2026, 11:17

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8

21 May 2026, 13:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-21 13:16

Updated : 2026-07-23 16:10

NVD link : CVE-2026-43502

Mitre link : CVE-2026-43502

CVE.ORG link : CVE-2026-43502

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo