{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23069","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-01-13T15:37:45.954Z","datePublished":"2026-02-04T16:07:49.911Z","dateUpdated":"2026-05-11T21:59:23.999Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:59:23.999Z"},"descriptions":[{"lang":"en","value":"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]"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/vmw_vsock/virtio_transport_common.c"],"versions":[{"version":"06a8fc78367d070720af960dcecec917d3ae5f3b","lessThan":"d96de882d6b99955604669d962ae14e94b66a551","status":"affected","versionType":"git"},{"version":"06a8fc78367d070720af960dcecec917d3ae5f3b","lessThan":"02f9af192b98d15883c70dd41ac76d1b0217c899","status":"affected","versionType":"git"},{"version":"06a8fc78367d070720af960dcecec917d3ae5f3b","lessThan":"d05bc313788f0684b27f0f5b60c52a844669b542","status":"affected","versionType":"git"},{"version":"06a8fc78367d070720af960dcecec917d3ae5f3b","lessThan":"ec0f1b3da8061be3173d1c39faaf9504f91942c3","status":"affected","versionType":"git"},{"version":"06a8fc78367d070720af960dcecec917d3ae5f3b","lessThan":"3ef3d52a1a9860d094395c7a3e593f3aa26ff012","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/vmw_vsock/virtio_transport_common.c"],"versions":[{"version":"4.8","status":"affected"},{"version":"0","lessThan":"4.8","status":"unaffected","versionType":"semver"},{"version":"6.1.162","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.122","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.68","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.8","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.1.162"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.6.122"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.12.68"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.18.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/d96de882d6b99955604669d962ae14e94b66a551"},{"url":"https://git.kernel.org/stable/c/02f9af192b98d15883c70dd41ac76d1b0217c899"},{"url":"https://git.kernel.org/stable/c/d05bc313788f0684b27f0f5b60c52a844669b542"},{"url":"https://git.kernel.org/stable/c/ec0f1b3da8061be3173d1c39faaf9504f91942c3"},{"url":"https://git.kernel.org/stable/c/3ef3d52a1a9860d094395c7a3e593f3aa26ff012"}],"title":"vsock/virtio: fix potential underflow in virtio_transport_get_credit()","x_generator":{"engine":"bippy-1.2.0"}}}}