{"id":"OESA-2026-3922","summary":"edk2 security update","details":"EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications.\r\n\r\nSecurity Fix(es):\n\nIssue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based\non querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive\ncan write and cleanse more bytes than that query reports, causing an 8-byte\nout-of-bounds heap write.\n\nImpact summary: An attacker who supplies a crafted CMS message can trigger a\ndeterministic 8-byte out-of-bounds heap write when the victim decrypts it\nwith CMS_decrypt(), corrupting the heap and typically resulting in a Denial\nof Service.\n\nCWE: CWE-787: Out-of-bounds Write\n\nDescription: The key-wrap OID is potentially attacker-controlled on the wire.\nCMS unwrapping allows both id-aesNNN-wrap-pad and id-aesNNN-wrap ciphers.\nAn attacker can take a legitimate message and change a single OID byte to\nselect the padded variant while leaving the message otherwise valid. Since\nthe unwrap key is derived from the recipient's private operation (ECDH key\nagreement or ML-KEM decapsulation), the RFC 5649 integrity check cannot\npass, and the decryption fails with integrity failure.\n\nThe write is a fixed-size (8-byte), fixed-value (zero) heap overflow\nimmediately past the allocation, requires no special configuration, and is\nreachable from the public CMS_decrypt() function. The consequence is\na heap corruption leading to a Denial of Service. The fix in the CMS code\nsizes the unwrap output buffer for the worst case so a failed unwrap cannot\nwrite past the allocation.\n\nFIPS impact: no\n\nAs the CMS code lives outside the FIPS module boundary, no FIPS\nmodules are affected by this CVE.(CVE-2026-63072)","modified":"2026-09-20T13:30:25.212335322Z","published":"2026-09-20T13:23:15Z","upstream":["CVE-2026-63072"],"database_specific":{"severity":"High"},"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3922"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63072"}],"affected":[{"package":{"name":"edk2","ecosystem":"openEuler:22.03-LTS-SP4","purl":"pkg:rpm/openEuler/edk2&distro=openEuler-22.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"202011-38.oe2203sp4"}]}],"ecosystem_specific":{"aarch64":["edk2-debuginfo-202011-38.oe2203sp4.aarch64.rpm","edk2-debugsource-202011-38.oe2203sp4.aarch64.rpm","edk2-devel-202011-38.oe2203sp4.aarch64.rpm"],"noarch":["edk2-aarch64-202011-38.oe2203sp4.noarch.rpm","edk2-help-202011-38.oe2203sp4.noarch.rpm","edk2-ovmf-202011-38.oe2203sp4.noarch.rpm","python3-edk2-devel-202011-38.oe2203sp4.noarch.rpm"],"src":["edk2-202011-38.oe2203sp4.src.rpm"],"x86_64":["edk2-debuginfo-202011-38.oe2203sp4.x86_64.rpm","edk2-debugsource-202011-38.oe2203sp4.x86_64.rpm","edk2-devel-202011-38.oe2203sp4.x86_64.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2026-3922.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}