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Integer Underflow The advisory has been revoked - it doesn't affect any version of package kernel-headers  (opens in a new tab)

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EPSS
0.13% (4th percentile)

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  • Snyk IDSNYK-RHEL10-KERNELHEADERS-15218374
  • published5 Feb 2026
  • disclosed4 Feb 2026
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Introduced: 4 Feb 2026

CVE-2026-23069  (opens in a new tab)
CWE-191  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-headers package and not the kernel-headers package as distributed by RHEL.

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]