{"id":"CVE-2026-80545","revision":"095f1d75fa174bdc8b518f61f44e777c","records":[{"revision":"095f1d75fa174bdc8b518f61f44e777c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80545","aliases":[],"title":"s390/zcrypt: Improve EP11 CPRB length and overflow checks","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Improve EP11 CPRB length and overflow checks\n\nThe xcrb_msg_to_type6_ep11cprb_msgx() function lacks proper input\nvalidation, creating security vulnerabilities:\n1. Missing minimum size validation: The ep11_cprb structure and\n   subsequent payload fields (pld_tag, pld_lenfmt) are copied from\n   userspace without verifying sufficient buffer length.\n2. Arithmetic overflow in length calculations: CEIL4 alignment could\n   overflow, bypassing size checks and enabling buffer overflows.\n3. The payload is asn1 encoded but the function just uses a simple c\n   struct overlay to access some fields of the payload.\n\nFix by using size_t for length calculations, adding U32_MAX boundary\nchecks after alignment, and validating minimum request size and\nminimum reply size before copying from userspace. Do a very simple\nasn1 parsing of the payload up to the function value field.","state":0,"publishedAt":"2026-08-26T14:37:16.956+00:00","modifiedAt":"2026-10-21T12:46:28.345+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                        \"drivers/s390/crypto/zcrypt_msgtype6.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"20b0b0159390fa5c00a435195649680fefda81e0\",\n                            \"lessThan\": \"f463f474773aa49ed1d6087d95d44cea7099fdc7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e2c6d91eb8b1533753755f07803e47eceed263d0\",\n                            \"lessThan\": \"2976b9d2e716c7e5487ca7c29a7bd076cf9adf08\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e2c6d91eb8b1533753755f07803e47eceed263d0\",\n                            \"lessThan\": \"17ac0bc866fc624cd05f022dcd8b730c0af11bb1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f9da85d4780515f65983e0af151458599adaef3d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.12.114\",\n                            \"lessThan\": \"6.13\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\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                        \"drivers/s390/crypto/zcrypt_msgtype6.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"7.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.10\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/f463f474773aa49ed1d6087d95d44cea7099fdc7","https://git.kernel.org/stable/c/2976b9d2e716c7e5487ca7c29a7bd076cf9adf08","https://git.kernel.org/stable/c/17ac0bc866fc624cd05f022dcd8b730c0af11bb1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80545","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80545","identifiers":["CVE-2026-80545"]},"retained":false,"historicalAffected":[]}],"coverage":[]}