{"id":"CVE-2023-6693","summary":"Qemu: virtio-net: stack buffer overflow in virtio_net_flush_tx()","details":"A stack based buffer overflow was found in the virtio-net device of QEMU. This issue occurs when flushing TX in the virtio_net_flush_tx function if guest features VIRTIO_NET_F_HASH_REPORT, VIRTIO_F_VERSION_1 and VIRTIO_NET_F_MRG_RXBUF are enabled. This could allow a malicious user to overwrite local variables allocated on the stack. Specifically, the `out_sg` variable could be used to read a part of process memory and send it to the wire, causing an information leak.","modified":"2026-05-19T12:03:18.090818403Z","published":"2024-01-02T09:15:08.280Z","related":["SUSE-SU-2024:1103-1","SUSE-SU-2024:3229-1","openSUSE-SU-2024:13705-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6693.json","cna_assigner":"redhat","cwe_ids":["CWE-121"]},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/04/msg00042.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OYGUN5HVOXESW7MSNM44E4AE2VNXQB6Y/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:2962"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:4492"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2023-6693"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6693.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-6693"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20240208-0004/"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2254580"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/qemu/qemu","events":[{"introduced":"0"},{"fixed":"f48c205fb42be48e2e47b7e1cd9a2802e5ca17b0"}],"database_specific":{"source":"CPE_FIELD","cpe":"cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"8.2.1"}]}}],"versions":["v8.2.0","v8.2.0-rc4","v8.2.0-rc3","v8.2.0-rc2","v8.2.0-rc1","v8.2.0-rc0","v8.1.0","v8.1.0-rc4","v8.1.0-rc3","v8.1.0-rc2","v8.1.0-rc1","v8.1.0-rc0","v8.0.0","v8.0.0-rc4","v8.0.0-rc3","v8.0.0-rc2","v7.2.0","v8.0.0-rc1","v8.0.0-rc0","v7.2.0-rc4","v7.2.0-rc3","v7.2.0-rc2","v7.2.0-rc1","v7.2.0-rc0","v7.1.0","v7.1.0-rc4","v7.1.0-rc3","v7.1.0-rc2","v7.1.0-rc1","v7.1.0-rc0","v7.0.0","v7.0.0-rc4","v7.0.0-rc3","v7.0.0-rc2","v7.0.0-rc1","v7.0.0-rc0","v6.2.0","v6.2.0-rc4","v6.1.0","v6.2.0-rc3","v6.2.0-rc1","v6.2.0-rc0","v6.0.0","v6.1.0-rc4","v6.1.0-rc3","v6.1.0-rc2","v6.1.0-rc1","v6.1.0-rc0","v6.0.0-rc5","v6.0.0-rc4","v6.0.0-rc3","v6.0.0-rc2","v6.0.0-rc1","v6.0.0-rc0","v5.2.0","v5.2.0-rc4","v5.2.0-rc3","v5.2.0-rc2","v5.2.0-rc1","v5.2.0-rc0","v5.0.0","v5.1.0","v5.1.0-rc3","v5.1.0-rc2","v5.1.0-rc1","v5.1.0-rc0","v4.2.0","v5.0.0-rc4","v5.0.0-rc3","v5.0.0-rc2","v5.0.0-rc1","v5.0.0-rc0","v4.2.0-rc5","v4.2.0-rc4","v4.2.0-rc3","v4.2.0-rc2","v4.2.0-rc1","v4.2.0-rc0","v4.1.0","v4.0.0","v4.1.0-rc5","v4.1.0-rc4","v4.1.0-rc3","v4.1.0-rc2","v4.1.0-rc1","v4.1.0-rc0","v4.0.0-rc4","v4.0.0-rc3","v4.0.0-rc2","v4.0.0-rc1","v3.1.0","v4.0.0-rc0","v3.0.0","v3.1.0-rc5","v3.1.0-rc4","v3.1.0-rc3","v3.1.0-rc2","v3.1.0-rc1","v3.1.0-rc0","v3.0.0-rc4","v3.0.0-rc3","v3.0.0-rc2","v3.0.0-rc1","v3.0.0-rc0","v2.12.0","v2.12.0-rc4","v2.12.0-rc3","v2.12.0-rc2","v2.12.0-rc1","v2.12.0-rc0","v2.11.0","v2.11.0-rc5","v2.11.0-rc4","v2.11.0-rc3","v2.11.0-rc2","v2.11.0-rc1","v2.11.0-rc0","v2.10.0","v2.10.0-rc4","v2.10.0-rc3","v2.10.0-rc2","v2.10.0-rc1","v2.9.0","v2.10.0-rc0","v2.9.0-rc5","v2.9.0-rc4","v2.9.0-rc3","v2.9.0-rc2","v2.9.0-rc1","v2.8.0","v2.9.0-rc0","v2.8.0-rc4","v2.8.0-rc3","v2.8.0-rc2","v2.8.0-rc1","v2.8.0-rc0","v2.7.0","v2.7.0-rc5","v2.7.0-rc4","v2.7.0-rc3","v2.7.0-rc2","v2.6.0","v2.7.0-rc1","v2.7.0-rc0","v2.6.0-rc5","v2.6.0-rc4","v2.6.0-rc3","v2.6.0-rc2","v2.6.0-rc1","v2.6.0-rc0","v2.5.0","v2.5.0-rc4","v2.5.0-rc3","v2.5.0-rc2","v2.5.0-rc1","v2.5.0-rc0","v2.4.0","v2.4.0-rc4","v2.4.0-rc3","v2.3.0","v2.4.0-rc2","v2.4.0-rc1","v2.4.0-rc0","v2.3.0-rc4","v2.3.0-rc3","v2.3.0-rc2","v2.3.0-rc1","v2.3.0-rc0","v2.2.0","v2.2.0-rc3","v2.2.0-rc5","v2.2.0-rc4","v2.2.0-rc2","v2.2.0-rc1","v2.2.0-rc0","v2.1.0","v2.1.0-rc5","v2.1.0-rc4","v2.1.0-rc2","v2.1.0-rc3","v2.0.0","v2.1.0-rc1","v2.1.0-rc0","v2.0.0-rc3","v2.0.0-rc2","v2.0.0-rc1","v2.0.0-rc0","v1.7.0","v1.7.0-rc2","v1.7.0-rc1","v1.7.0-rc0","v1.6.0","v1.6.0-rc3","v1.6.0-rc2","v1.6.0-rc1","v1.6.0-rc0","v1.5.0","v1.5.0-rc3","v1.5.0-rc2","v1.5.0-rc1","v1.5.0-rc0","v1.4.0","v1.4.0-rc2","v1.4.0-rc1","v1.4.0-rc0","v1.3.0","v1.3.0-rc2","v1.3.0-rc1","v1.3.0-rc0","v1.2.0","v1.2.0-rc3","v1.2.0-rc2","v1.2.0-rc1","v1.2.0-rc0","v1.1.0","v1.1.0-rc4","v1.1.0-rc3","v1.1.0-rc2","v1.1-rc2","v1.1-rc1","v1.1-rc0","v1.0","v1.0-rc4","v1.0-rc3","v1.0-rc2","v1.0-rc1","v1.0-rc0","v0.14.0-rc0","v0.13.0-rc0","v0.12.0-rc0","v0.11.0-rc0","v0.5.0","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.0","v0.2.0","v0.1.6","v0.1.5","v0.1.4","v0.1.3","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-6693.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"}]}