CVE-2026-23069

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-23069
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix potential underflow in virtio_transport_get_credit() The credit calculation in virtio_transport_get_credit() uses unsigned arithmetic: ret = vvs->peer_buf_alloc - (vvs->tx_cnt - vvs->peer_fwd_cnt); If the peer shrinks its advertised buffer (peer_buf_alloc) while bytes are in flight, the subtraction can underflow and produce a large positive value, potentially allowing more data to be queued than the peer can handle. Reuse virtio_transport_has_space() which already handles this case and add a comment to make it clear why we are doing that. [Stefano: use virtio_transport_has_space() instead of duplicating the code] [Stefano: tweak the commit message]

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/02f9af192b98d15883c70dd41ac76d1b0217c899 Patch
https://git.kernel.org/stable/c/3ef3d52a1a9860d094395c7a3e593f3aa26ff012 Patch
https://git.kernel.org/stable/c/d05bc313788f0684b27f0f5b60c52a844669b542 Patch
https://git.kernel.org/stable/c/d96de882d6b99955604669d962ae14e94b66a551 Patch
https://git.kernel.org/stable/c/ec0f1b3da8061be3173d1c39faaf9504f91942c3 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:6.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*
History

13 Mar 2026, 21:27

Type Values Removed Values Added
First Time Linux
Linux linux Kernel
CWE CWE-191
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
Summary
  • (es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: vsock/virtio: soluciona un posible desbordamiento negativo en virtio_transport_get_credit() El cálculo de crédito en virtio_transport_get_credit() utiliza aritmética sin signo: ret = vvs->peer_buf_alloc - (vvs->tx_cnt - vvs->peer_fwd_cnt); Si el par reduce su búfer anunciado (peer_buf_alloc) mientras hay bytes en tránsito, la resta puede sufrir un desbordamiento negativo y producir un valor positivo grande, lo que podría permitir que se pongan en cola más datos de los que el par puede manejar. Reutilizar virtio_transport_has_space() que ya maneja este caso y añadir un comentario para dejar claro por qué lo estamos haciendo. [Stefano: usar virtio_transport_has_space() en lugar de duplicar el código] [Stefano: ajustar el mensaje de commit]
CPE cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/02f9af192b98d15883c70dd41ac76d1b0217c899 - () https://git.kernel.org/stable/c/02f9af192b98d15883c70dd41ac76d1b0217c899 - Patch
References () https://git.kernel.org/stable/c/3ef3d52a1a9860d094395c7a3e593f3aa26ff012 - () https://git.kernel.org/stable/c/3ef3d52a1a9860d094395c7a3e593f3aa26ff012 - Patch
References () https://git.kernel.org/stable/c/d05bc313788f0684b27f0f5b60c52a844669b542 - () https://git.kernel.org/stable/c/d05bc313788f0684b27f0f5b60c52a844669b542 - Patch
References () https://git.kernel.org/stable/c/d96de882d6b99955604669d962ae14e94b66a551 - () https://git.kernel.org/stable/c/d96de882d6b99955604669d962ae14e94b66a551 - Patch
References () https://git.kernel.org/stable/c/ec0f1b3da8061be3173d1c39faaf9504f91942c3 - () https://git.kernel.org/stable/c/ec0f1b3da8061be3173d1c39faaf9504f91942c3 - Patch

06 Feb 2026, 17:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/d96de882d6b99955604669d962ae14e94b66a551 -

04 Feb 2026, 17:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-02-04 17:16

Updated : 2026-03-13 21:27

NVD link : CVE-2026-23069

Mitre link : CVE-2026-23069

CVE.ORG link : CVE-2026-23069

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-191

Integer Underflow (Wrap or Wraparound)