{"id":"CVE-2026-41516","state":"PUBLISHED","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`.","publishedAt":"2026-07-06T19:27:32.040Z","updatedAt":"2026-07-06T19:47:57.871Z","severity":{"score":2.5,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["OP-TEE optee_os"],"affected":[{"vendor":"OP-TEE","product":"optee_os","versions":[{"version":">= 4.5.0, < 4.11.0","status":"affected"}]}],"references":["https://github.com/OP-TEE/optee_os/security/advisories/GHSA-wxp6-8wwr-h4gf"],"weaknesses":["CWE-208"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/41xxx/CVE-2026-41516.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-41516","state":"PUBLISHED","datePublished":"2026-07-06T19:27:32.040Z","dateUpdated":"2026-07-06T19:47:57.871Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-20T18:18:50.681Z"},"containers":{"cna":{"title":"OP-TEE: Hisilicon HPRE PKCS#1 v1.5 Decryption Padding Oracle","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`."}],"affected":[{"vendor":"OP-TEE","product":"optee_os","versions":[{"version":">= 4.5.0, < 4.11.0","status":"affected"}]}],"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","tags":["x_refsource_CONFIRM"]}],"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","lang":"en","description":"CWE-208: Observable Timing Discrepancy","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-06T19:27:32.040Z"},"source":{"advisory":"GHSA-wxp6-8wwr-h4gf","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-06T19:47:50.040845Z","id":"CVE-2026-41516","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-06T19:47:57.871Z"}}]}}}