{"id":"CVE-2026-80544","revision":null,"records":[{"revision":"d17e8ed3e09d46c78523c1aac11b7b39","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80544","aliases":[],"title":"s390/zcrypt: Improve EP11 CPRB domain handling with ASN.1 parsing","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Improve EP11 CPRB domain handling with ASN.1 parsing\n\nThe zcrypt_msgtype6_send_ep11_cprb() function uses fragile struct\noverlays to access and modify the domain field in the EP11 CPRB\npayload, creating maintainability and security concerns:\n1. Struct overlay approach (pld_hdr) assumes fixed payload structure\n   and doesn't validate the actual ASN.1 encoding.\n2. Complex length format detection logic is error-prone and doesn't\n   properly validate bounds at each parsing step.\n3. Direct struct member access bypasses proper ASN.1 validation.\n\nFix by replacing struct overlays with explicit ASN.1 parsing that\nvalidates each field (payload tag/length, function tag/length/value,\noptional domain tag/length/value) with proper bounds checking at every\nstep. Add asn1_int_encode() helper function to safely write integer\nvalues with correct endianness conversion. This makes the code\nconsistent with the validation pattern introduced with the rework of\nthe xcrb_msg_to_type6_ep11cprb_msgx() function.","state":0,"publishedAt":"2026-08-26T14:37:16.367+00:00","modifiedAt":"2026-10-21T12:46:27.17+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\": \"00a44ff06bcffb68b9cd7e90d2259b7d14b82b18\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e2c6d91eb8b1533753755f07803e47eceed263d0\",\n                            \"lessThan\": \"db21b2cf6dd0af5ffd08931e0a9fcda5a0473220\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e2c6d91eb8b1533753755f07803e47eceed263d0\",\n                            \"lessThan\": \"0864a163783bff109b548266921829ea794edc93\",\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/00a44ff06bcffb68b9cd7e90d2259b7d14b82b18","https://git.kernel.org/stable/c/db21b2cf6dd0af5ffd08931e0a9fcda5a0473220","https://git.kernel.org/stable/c/0864a163783bff109b548266921829ea794edc93"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80544","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80544","identifiers":["CVE-2026-80544"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-08T10:04:32.7352320+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-08T10:04:32.735232+00:00","lastSuccessAt":"2026-11-08T10:04:32.956954+00:00","error":null,"lastVerifiedAt":"2026-11-08T10:04:32.9569616+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-eaa64dac63caa79c8d4905619258c41c51b39e461b996124e1a21b5e85e7e738-e58a079eb6f76d5949b871c295ad9e8f78e928765ff9950581a38d46375b9852","complete":true,"records":421096,"lastAttemptAt":"2026-11-08T10:04:32.1680283+00:00","lastSuccessAt":"2026-11-08T07:59:14.3145447+00:00","error":"HttpRequestException","lastVerifiedAt":"2026-11-08T07:59:14.338564+00:00","snapshotPublishedAt":"2026-11-08T07:27:32+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-ce0df89a405747cda5b7c61ae0b48fb2","complete":true,"records":13633,"lastAttemptAt":"2026-11-08T10:04:58.8018093+00:00","lastSuccessAt":"2026-11-08T05:08:40.263+00:00","error":null,"lastVerifiedAt":"2026-11-08T05:08:40.263+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-08T10:04:32.7352320+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-08T10:04:32.735232+00:00","lastSuccessAt":"2026-11-08T10:04:32.958305+00:00","error":null,"lastVerifiedAt":"2026-11-08T10:04:32.9583056+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-2ca35de6f6b748bea5c32f6d843eca15","complete":true,"records":13645,"lastAttemptAt":"2026-11-08T10:04:58.1666994+00:00","lastSuccessAt":"2026-11-08T10:04:58.163+00:00","error":null,"lastVerifiedAt":"2026-11-08T10:04:58.163+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-0eb4d6dde62dffacd040ad992d4fd5a65cd7d0dc5f5f4cfa8b41967fc6f9ca5f","complete":true,"records":9914,"lastAttemptAt":"2026-11-08T10:04:32.5160062+00:00","lastSuccessAt":"2026-11-06T20:10:36.6450506+00:00","error":null,"lastVerifiedAt":"2026-11-08T10:04:32.5160062+00:00","snapshotPublishedAt":"2026-11-06T20:02:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-08T10:04:32.3168711+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-08T10:04:32.3168711+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-335633e78a15c9cde10a6025895b5617717087fb945489ae7e15d377bacf34a9","complete":true,"records":3055,"lastAttemptAt":"2026-11-08T10:04:32.6972338+00:00","lastSuccessAt":"2026-11-06T16:03:00.7615789+00:00","error":null,"lastVerifiedAt":"2026-11-08T10:04:32.6972338+00:00","snapshotPublishedAt":"2026-11-06T16:02:48+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-8efbf882841c7fda0cba0c3b55677f4781f461b96ab83577ad2701c4eaf88b1e","complete":true,"records":231293,"lastAttemptAt":"2026-11-08T10:04:32.4139557+00:00","lastSuccessAt":"2026-11-08T08:01:14.837451+00:00","error":null,"lastVerifiedAt":"2026-11-08T10:04:32.4139557+00:00","snapshotPublishedAt":"2026-11-08T07:33:16+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}