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.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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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