{"cve":"CVE-2026-23069","nvd":{"published":"2026-02-04T17:16:17.610","modified":"2026-10-19T19:17:33.783","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: fix potential underflow in virtio_transport_get_credit()\n\nThe credit calculation in virtio_transport_get_credit() uses unsigned\narithmetic:\n\n  ret = vvs->peer_buf_alloc - (vvs->tx_cnt - vvs->peer_fwd_cnt);\n\nIf the peer shrinks its advertised buffer (peer_buf_alloc) while bytes\nare in flight, the subtraction can underflow and produce a large\npositive value, potentially allowing more data to be queued than the\npeer can handle.\n\nReuse virtio_transport_has_space() which already handles this case and\nadd a comment to make it clear why we are doing that.\n\n[Stefano: use virtio_transport_has_space() instead of duplicating the code]\n[Stefano: tweak the commit message]","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-191","CWE-190"],"references":["https://git.kernel.org/stable/c/02f9af192b98d15883c70dd41ac76d1b0217c899","https://git.kernel.org/stable/c/3ef3d52a1a9860d094395c7a3e593f3aa26ff012","https://git.kernel.org/stable/c/d05bc313788f0684b27f0f5b60c52a844669b542","https://git.kernel.org/stable/c/d96de882d6b99955604669d962ae14e94b66a551","https://git.kernel.org/stable/c/ec0f1b3da8061be3173d1c39faaf9504f91942c3"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2026-23069","score":0.00182,"percentile":0.0771,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}