CVE-2026-23069None▾ SunlitIn 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->…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
0.1% → 0.2%
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]
Linux >= 06a8fc78367d070720af960dcecec917d3ae5f3b < d96de882d6b99955604669d962ae14e94b66a551Linux >= 06a8fc78367d070720af960dcecec917d3ae5f3b < 02f9af192b98d15883c70dd41ac76d1b0217c899Linux >= 06a8fc78367d070720af960dcecec917d3ae5f3b < d05bc313788f0684b27f0f5b60c52a844669b542Linux >= 06a8fc78367d070720af960dcecec917d3ae5f3b < ec0f1b3da8061be3173d1c39faaf9504f91942c3Linux >= 06a8fc78367d070720af960dcecec917d3ae5f3b < 3ef3d52a1a9860d094395c7a3e593f3aa26ff012Linux 4.8Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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