Tracker / CVE-2026-23069
CVE-2026-23069
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]
Prodotti e versioni affette
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 4.8 → 6.1.162 |
| linux | linux_kernel · 6.13 → 6.18.8 |
| linux | linux_kernel · 6.2 → 6.6.122 |
| linux | linux_kernel · 6.7 → 6.12.68 |