CVE-2026-46320

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-46320
In the Linux kernel, the following vulnerability has been resolved: tap: free page on error paths in tap_get_user_xdp() tap_get_user_xdp() rejects a frame shorter than ETH_HLEN with -EINVAL, and returns -ENOMEM when build_skb() fails. Both paths jump to the err label without freeing the page that vhost_net_build_xdp() allocated for the frame. tap_sendmsg() discards the per-buffer return value and always returns 0, so vhost_tx_batch() takes the success path and never frees the page; each rejected frame in a batch leaks one page-frag chunk. Free the page on both error paths, before the skb is built. This is the tap counterpart of the same leak in tun_xdp_one().

7.4 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 4.0

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References
Link Resource
https://git.kernel.org/stable/c/18a84c35842e19cd3c5534d8cee73d31863f696d Patch
https://git.kernel.org/stable/c/3bcf7aec6a9d16438f2cec29f5d7c8d5b8edf9b2 Patch
https://git.kernel.org/stable/c/3f52a86a482a69294c50a5a2a097bd6f4104990a Patch
https://git.kernel.org/stable/c/8d03e65eb6cfbffec471a6b65416f93679bf3286 Patch
https://git.kernel.org/stable/c/d30aac0fa00ca0afc3e08174cf7f974a66bdcf05 Patch
https://git.kernel.org/stable/c/d68eab61944a9b0826fa2e954e42db1aa3201b7a Patch
https://git.kernel.org/stable/c/e27c17346628cb56843a83f93ac63c314c00f388 Patch
https://git.kernel.org/stable/c/f979971835dddbca86cf99e3b2e2b94a408a1ab2 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:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
History

23 Jul 2026, 08:10

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: tap: liberar página en las rutas de error en tap_get_user_xdp() tap_get_user_xdp() rechaza una trama más corta que ETH_HLEN con -EINVAL, y devuelve -ENOMEM cuando build_skb() falla. Ambas rutas saltan a la etiqueta err sin liberar la página que vhost_net_build_xdp() asignó para la trama. tap_sendmsg() descarta el valor de retorno por búfer y siempre devuelve 0, por lo que vhost_tx_batch() toma la ruta de éxito y nunca libera la página; cada trama rechazada en un lote filtra un fragmento de página. Liberar la página en ambas rutas de error, antes de que se construya el skb. Esta es la contraparte de tap de la misma fuga en tun_xdp_one().

08 Jul 2026, 16:27

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:7.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/18a84c35842e19cd3c5534d8cee73d31863f696d - () https://git.kernel.org/stable/c/18a84c35842e19cd3c5534d8cee73d31863f696d - Patch
References () https://git.kernel.org/stable/c/3bcf7aec6a9d16438f2cec29f5d7c8d5b8edf9b2 - () https://git.kernel.org/stable/c/3bcf7aec6a9d16438f2cec29f5d7c8d5b8edf9b2 - Patch
References () https://git.kernel.org/stable/c/3f52a86a482a69294c50a5a2a097bd6f4104990a - () https://git.kernel.org/stable/c/3f52a86a482a69294c50a5a2a097bd6f4104990a - Patch
References () https://git.kernel.org/stable/c/8d03e65eb6cfbffec471a6b65416f93679bf3286 - () https://git.kernel.org/stable/c/8d03e65eb6cfbffec471a6b65416f93679bf3286 - Patch
References () https://git.kernel.org/stable/c/d30aac0fa00ca0afc3e08174cf7f974a66bdcf05 - () https://git.kernel.org/stable/c/d30aac0fa00ca0afc3e08174cf7f974a66bdcf05 - Patch
References () https://git.kernel.org/stable/c/d68eab61944a9b0826fa2e954e42db1aa3201b7a - () https://git.kernel.org/stable/c/d68eab61944a9b0826fa2e954e42db1aa3201b7a - Patch
References () https://git.kernel.org/stable/c/e27c17346628cb56843a83f93ac63c314c00f388 - () https://git.kernel.org/stable/c/e27c17346628cb56843a83f93ac63c314c00f388 - Patch
References () https://git.kernel.org/stable/c/f979971835dddbca86cf99e3b2e2b94a408a1ab2 - () https://git.kernel.org/stable/c/f979971835dddbca86cf99e3b2e2b94a408a1ab2 - Patch

19 Jun 2026, 13:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/3f52a86a482a69294c50a5a2a097bd6f4104990a -
  • () https://git.kernel.org/stable/c/8d03e65eb6cfbffec471a6b65416f93679bf3286 -
  • () https://git.kernel.org/stable/c/d30aac0fa00ca0afc3e08174cf7f974a66bdcf05 -
  • () https://git.kernel.org/stable/c/d68eab61944a9b0826fa2e954e42db1aa3201b7a -
  • () https://git.kernel.org/stable/c/e27c17346628cb56843a83f93ac63c314c00f388 -
  • () https://git.kernel.org/stable/c/f979971835dddbca86cf99e3b2e2b94a408a1ab2 -

14 Jun 2026, 06:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.4

09 Jun 2026, 13:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-06-09 13:16

Updated : 2026-07-23 08:10

NVD link : CVE-2026-46320

Mitre link : CVE-2026-46320

CVE.ORG link : CVE-2026-46320

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo