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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-23069 Detail

Description

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]


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/02f9af192b98d15883c70dd41ac76d1b0217c899 kernel.org
https://git.kernel.org/stable/c/3ef3d52a1a9860d094395c7a3e593f3aa26ff012 kernel.org
https://git.kernel.org/stable/c/d05bc313788f0684b27f0f5b60c52a844669b542 kernel.org
https://git.kernel.org/stable/c/d96de882d6b99955604669d962ae14e94b66a551 kernel.org
https://git.kernel.org/stable/c/ec0f1b3da8061be3173d1c39faaf9504f91942c3 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-23069
NVD Published Date:
02/04/2026
NVD Last Modified:
02/06/2026
Source:
kernel.org