{"id":"CVE-2026-43406","revision":"0c9250fa623c42d5ab03399162f2b8bd","records":[{"revision":"0c9250fa623c42d5ab03399162f2b8bd","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43406","aliases":[],"title":"libceph: prevent potential out-of-bounds reads in process_message_header()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: prevent potential out-of-bounds reads in process_message_header()\n\nIf the message frame is (maliciously) corrupted in a way that the\nlength of the control segment ends up being less than the size of the\nmessage header or a different frame is made to look like a message\nframe, out-of-bounds reads may ensue in process_message_header().\n\nPerform an explicit bounds check before decoding the message header.","state":0,"publishedAt":"2026-05-08T14:21:46.246+00:00","modifiedAt":"2026-10-19T19:16:28.625+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ceph/messenger_v2.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"cd1a677cad994021b19665ed476aea63f5d54f31\",\n                            \"lessThan\": \"76ccf21a12c5f6d6790bc32c7da82446d877b2f4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cd1a677cad994021b19665ed476aea63f5d54f31\",\n                            \"lessThan\": \"75582aaa580c11aed4c7731cad6b068b700e7efb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cd1a677cad994021b19665ed476aea63f5d54f31\",\n                            \"lessThan\": \"50156622eb0888e62541d715a98584480a1bc7cb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cd1a677cad994021b19665ed476aea63f5d54f31\",\n                            \"lessThan\": \"dbd857a9e1e33ea71eaf3e211877027e533770d1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cd1a677cad994021b19665ed476aea63f5d54f31\",\n                            \"lessThan\": \"69fe5af33fa3806f398d21c081d73c66e5523bc2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cd1a677cad994021b19665ed476aea63f5d54f31\",\n                            \"lessThan\": \"035867ae6f18df0aeedb2a57a5b74091bd4e3fe8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cd1a677cad994021b19665ed476aea63f5d54f31\",\n                            \"lessThan\": \"69fb5d91bba44ecf7eb80530b85fa4fb028921d5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ceph/messenger_v2.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.11\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.11\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.203\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.167\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.130\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.78\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.19\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.9\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":9.1,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/76ccf21a12c5f6d6790bc32c7da82446d877b2f4","https://git.kernel.org/stable/c/75582aaa580c11aed4c7731cad6b068b700e7efb","https://git.kernel.org/stable/c/50156622eb0888e62541d715a98584480a1bc7cb","https://git.kernel.org/stable/c/dbd857a9e1e33ea71eaf3e211877027e533770d1","https://git.kernel.org/stable/c/69fe5af33fa3806f398d21c081d73c66e5523bc2","https://git.kernel.org/stable/c/035867ae6f18df0aeedb2a57a5b74091bd4e3fe8","https://git.kernel.org/stable/c/69fb5d91bba44ecf7eb80530b85fa4fb028921d5"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43406","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43406","identifiers":["CVE-2026-43406"]},"retained":false,"historicalAffected":[]}],"coverage":[]}