CVE-2026-23069

MEDIUM EPSS 2.7%
Published Feb 4, 20264mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Feb 4, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

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]

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-191

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥4.8  –  <6.1.162
linuxlinux_kernel*≥6.2  –  <6.6.122
linuxlinux_kernel*≥6.7  –  <6.12.68
linuxlinux_kernel*≥6.13  –  <6.18.8
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/02f9af192b98d15883c70dd41ac76d1b0217c899
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3ef3d52a1a9860d094395c7a3e593f3aa26ff012
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d05bc313788f0684b27f0f5b60c52a844669b542
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d96de882d6b99955604669d962ae14e94b66a551
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ec0f1b3da8061be3173d1c39faaf9504f91942c3
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/02f9af192b98d15883c70dd41ac76d1b0217c899
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3ef3d52a1a9860d094395c7a3e593f3aa26ff012
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d05bc313788f0684b27f0f5b60c52a844669b542
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d96de882d6b99955604669d962ae14e94b66a551
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ec0f1b3da8061be3173d1c39faaf9504f91942c3
    Patch