CVE-2026-23069

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(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]"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nvsock/virtio: soluciona un posible desbordamiento negativo en virtio_transport_get_credit()\n\nEl c\u00e1lculo de cr\u00e9dito en virtio_transport_get_credit() utiliza aritm\u00e9tica sin signo:\n\nret = vvs->peer_buf_alloc - (vvs->tx_cnt - vvs->peer_fwd_cnt);\n\nSi el par reduce su b\u00fafer anunciado (peer_buf_alloc) mientras hay bytes en tr\u00e1nsito, la resta puede sufrir un desbordamiento negativo y producir un valor positivo grande, lo que podr\u00eda permitir que se pongan en cola m\u00e1s datos de los que el par puede manejar.\n\nReutilizar virtio_transport_has_space() que ya maneja este caso y a\u00f1adir un comentario para dejar claro por qu\u00e9 lo estamos haciendo.\n\n[Stefano: usar virtio_transport_has_space() en lugar de duplicar el c\u00f3digo]\n[Stefano: ajustar el mensaje de commit]"}], "id": "CVE-2026-23069", "lastModified": "2026-10-19T19:17:33.783", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23069", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-10T20:41:19.172207Z", "version": "2.0.3"}}]}, "published": "2026-02-04T17:16:17.610", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/02f9af192b98d15883c70dd41ac76d1b0217c899"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3ef3d52a1a9860d094395c7a3e593f3aa26ff012"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d05bc313788f0684b27f0f5b60c52a844669b542"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d96de882d6b99955604669d962ae14e94b66a551"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ec0f1b3da8061be3173d1c39faaf9504f91942c3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-191"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-190"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: vsock/virtio: fix potential underflow in virtio_transport_get_credit()", "id": "2436768", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2436768"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2026-23069", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-02-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23069\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23069\nhttps://lore.kernel.org/linux-cve-announce/2026020417-CVE-2026-23069-d026@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2026-04-18T14:00:02.184688+00:00", "updated": "2026-10-19T20:45:03.511903+00:00", "vendors": []}