{"api_version":"1","generated_at":"2026-07-08T00:05:32+00:00","cve":"CVE-2026-41516","urls":{"html":"https://cve.report/CVE-2026-41516","api":"https://cve.report/api/cve/CVE-2026-41516.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-41516","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-41516"},"summary":{"title":"OP-TEE: Hisilicon HPRE PKCS#1 v1.5 Decryption Padding Oracle","description":"OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 4.5.0 and prior to version 4.11.0, the RSA PKCS#1 v1.5 decryption implementation in the Hisilicon HPRE crypto driver uses non-constant-time `memcmp()` for label hash verification and has multiple distinguishable error paths. This creates a Bleichenbacher-style padding oracle that allows an attacker to recover RSA PKCS#1 v1.5  plaintext. Version 4.11.0 contains a patch. As a workaround, disable Hisilicon HPRE RSA driver with `CFG_HISILICON_ACC_V3=n`.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-07-06 20:16:32","updated_at":"2026-07-07 18:56:37"},"problem_types":["CWE-208","CWE-208 CWE-208: Observable Timing Discrepancy"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"3.3","severity":"LOW","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","baseScore":3.3,"baseSeverity":"LOW","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"}},{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"2.5","severity":"LOW","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","baseScore":2.5,"baseSeverity":"LOW","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"2.5","severity":"LOW","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","data":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":2.5,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"references":[{"url":"https://github.com/OP-TEE/optee_os/security/advisories/GHSA-wxp6-8wwr-h4gf","name":"https://github.com/OP-TEE/optee_os/security/advisories/GHSA-wxp6-8wwr-h4gf","refsource":"security-advisories@github.com","tags":["Mitigation","Vendor Advisory","Exploit","Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-41516","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41516","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"OP-TEE","product":"optee_os","version":"affected >= 4.5.0, < 4.11.0","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2026","cve_id":"41516","vulnerable":"1","versionEndIncluding":"4.10.0","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"trustedfirmware","cpe5":"op-tee","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-41516","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-07-06T19:47:50.040845Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-07-06T19:47:57.871Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"optee_os","vendor":"OP-TEE","versions":[{"status":"affected","version":">= 4.5.0, < 4.11.0"}]}],"descriptions":[{"lang":"en","value":"OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 4.5.0 and prior to version 4.11.0, the RSA PKCS#1 v1.5 decryption implementation in the Hisilicon HPRE crypto driver uses non-constant-time `memcmp()` for label hash verification and has multiple distinguishable error paths. This creates a Bleichenbacher-style padding oracle that allows an attacker to recover RSA PKCS#1 v1.5  plaintext. Version 4.11.0 contains a patch. As a workaround, disable Hisilicon HPRE RSA driver with `CFG_HISILICON_ACC_V3=n`."}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":2.5,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-208","description":"CWE-208: Observable Timing Discrepancy","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-07-06T19:27:32.040Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/OP-TEE/optee_os/security/advisories/GHSA-wxp6-8wwr-h4gf","tags":["x_refsource_CONFIRM"],"url":"https://github.com/OP-TEE/optee_os/security/advisories/GHSA-wxp6-8wwr-h4gf"}],"source":{"advisory":"GHSA-wxp6-8wwr-h4gf","discovery":"UNKNOWN"},"title":"OP-TEE: Hisilicon HPRE PKCS#1 v1.5 Decryption Padding Oracle"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-41516","datePublished":"2026-07-06T19:27:32.040Z","dateReserved":"2026-04-20T18:18:50.681Z","dateUpdated":"2026-07-06T19:47:57.871Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-06 20:16:32","lastModifiedDate":"2026-07-07 18:56:37","problem_types":["CWE-208","CWE-208 CWE-208: Observable Timing Discrepancy"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","baseScore":2.5,"baseSeverity":"LOW","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":1,"impactScore":1.4},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","baseScore":3.3,"baseSeverity":"LOW","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":1.8,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-06T19:47:50.040845Z","id":"CVE-2026-41516","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:trustedfirmware:op-tee:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5.0","versionEndIncluding":"4.10.0","matchCriteriaId":"8B93151E-CC12-4D48-8C7F-FE2EF4FF519E"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"41516","Ordinal":"1","Title":"OP-TEE: Hisilicon HPRE PKCS#1 v1.5 Decryption Padding Oracle","CVE":"CVE-2026-41516","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"41516","Ordinal":"1","NoteData":"OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 4.5.0 and prior to version 4.11.0, the RSA PKCS#1 v1.5 decryption implementation in the Hisilicon HPRE crypto driver uses non-constant-time `memcmp()` for label hash verification and has multiple distinguishable error paths. This creates a Bleichenbacher-style padding oracle that allows an attacker to recover RSA PKCS#1 v1.5  plaintext. Version 4.11.0 contains a patch. As a workaround, disable Hisilicon HPRE RSA driver with `CFG_HISILICON_ACC_V3=n`.","Type":"Description","Title":"OP-TEE: Hisilicon HPRE PKCS#1 v1.5 Decryption Padding Oracle"}]}}}