{"affected":[{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 8","source":"CNA: redhat","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:4.18.0-553.rt7.342.el8_10","versionType":"rpm"}]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel","product":"Red Hat Enterprise Linux 8","source":"CNA: redhat","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:4.18.0-553.el8_10","versionType":"rpm"}]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel","product":"Red Hat Enterprise Linux 9","source":"CNA: redhat","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:5.14.0-427.13.1.el9_4","versionType":"rpm"}]},{"defaultStatus":"unknown","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel","product":"Red Hat Enterprise Linux 6","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"unknown","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel","product":"Red Hat Enterprise Linux 7","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"unknown","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 7","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 9","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"unknown","product":"RUGGEDCOM RST2428P","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"unaffected","version":"0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"unaffected","version":"0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SCALANCE XCM-/XRM-/XCH-/XRH-300 family","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"unaffected","version":"0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"V3.1.5","status":"affected","version":"V3.1.0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"V3.1.5","status":"affected","version":"V3.1.0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"V1.1.1","status":"affected","version":"0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"V3.1.5","status":"affected","version":"V3.1.0","versionType":"custom"}]}],"cveId":"CVE-2023-6121","cwes":["CWE-125"],"description":"An out-of-bounds read vulnerability was found in the NVMe-oF/TCP subsystem in the Linux kernel. This issue may allow a remote attacker to send a crafted TCP packet, triggering a heap-based buffer overflow that results in kmalloc data being printed and potentially leaked to the kernel ring buffer (dmesg).","epss":{"date":"2026-11-05","percentile":0.76506,"score":0.01643},"exploits":[],"kev":null,"metrics":[{"score":4.3,"severity":"medium","source":"CNA: redhat","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}],"modifiedAt":1793972404840,"publishedAt":1700145938430,"references":[{"source":"CNA: redhat","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2024:2394"},{"source":"CNA: redhat","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2024:2950"},{"source":"CNA: redhat","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2024:3138"},{"source":"CNA: redhat","tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2023-6121"},{"source":"CNA: redhat","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2250043"},{"source":"ADP: CVE","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"],"url":"https://access.redhat.com/errata/RHSA-2024:2394"},{"source":"ADP: CVE","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"],"url":"https://access.redhat.com/errata/RHSA-2024:2950"},{"source":"ADP: CVE","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"],"url":"https://access.redhat.com/errata/RHSA-2024:3138"},{"source":"ADP: CVE","tags":["vdb-entry","x_refsource_REDHAT","x_transferred"],"url":"https://access.redhat.com/security/cve/CVE-2023-6121"},{"source":"ADP: CVE","tags":["issue-tracking","x_refsource_REDHAT","x_transferred"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2250043"},{"source":"ADP: CVE","tags":["x_transferred"],"url":"https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-398330.html"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-613116.html"}],"remediation":[{"kind":"workaround","source":"CNA: redhat","text":"This flaw can be mitigated by explicitly setting the kernel parameter to restrict unprivileged users from using dmesg:\n```\nsudo sysctl -w kernel.dmesg_restrict=1\n```\nTo make it persistent between system reboots:\n```\necho 'kernel.dmesg_restrict=1' | sudo tee -a /etc/sysctl.conf\n```"}],"revision":"200bb6b30721abed24b1fe5fbf40a571e019eb2578702def9c44b66b6409155c","sources":[{"modifiedAt":1793972404840,"name":"CNA: redhat","retrievedAt":1793974114871,"url":"https://www.cve.org/CVERecord?id=CVE-2023-6121"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793974189470,"url":"https://api.first.org/data/v1/epss?cve=CVE-2023-6121"}],"ssvc":{"assessedAt":1749563881737,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Kernel: nvme: info leak due to out-of-bounds read in nvmet_ctrl_find_get","updatedAt":1793974189470}