{
	"document":{
		"aggregate_severity":{
			"namespace":"https://nvd.nist.gov/vuln-metrics/cvss",
			"text":"High"
		},
		"category":"csaf_vex",
		"csaf_version":"2.0",
		"distribution":{
			"tlp":{
				"label":"WHITE",
				"url":"https:/www.first.org/tlp/"
			}
		},
		"lang":"en",
		"notes":[
			{
				"text":"shim security update",
				"category":"general",
				"title":"Synopsis"
			},
			{
				"text":"An update for shim is now available for openEuler-24.03-LTS-SP3,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS-SP1",
				"category":"general",
				"title":"Summary"
			},
			{
				"text":"Initial UEFI bootloader that handles chaining to a trusted full \\ bootloader under secure boot environments.\n\nSecurity Fix(es):\n\nIssue summary: Parsing a crafted DER-encoded ASN.1 structure with a primitive\nelement whose content exceeds 2 gigabytes in length may cause a heap buffer\nover-read on 64-bit Unix and Unix-like platforms.\n\nImpact summary: The heap buffer over-read may crash the application (Denial of\nService) or to load into the decoded ASN.1 object contents of memory beyond the\nend of the input buffer.  More typically such ASN.1 elements would instead be\ntruncated.\n\nAn integer truncation in OpenSSL's ASN.1 decoder causes the content length of\nan ASN.1 primitive element to be mishandled when it exceeds 2 gigabytes. In the\nworst case the truncated length is treated as a request to scan the binary\ncontent for a terminating zero byte, possibly causing OpenSSL to read either\nless than or beyond the end of the allocated buffer.\n\nApplications that pass attacker-supplied data to d2i_X509(), d2i_PKCS7(), or\nany other d2i_* decoding function are affected. OpenSSL's own command-line\ntools are not vulnerable, as data read through the BIO layer is checked before\nit reaches the affected code. The issue only affects 64-bit Unix and Unix-like\nplatforms; 32-bit platforms and 64-bit Windows are not affected.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4 and 3.0 are not affected by this issue,\nas the affected code is outside the OpenSSL FIPS module boundary.(CVE-2026-34180)\n\nIssue summary: A specially crafted PKCS#7 or S/MIME signed message could\ntrigger a use-after-free during PKCS#7 signature verification.\n\nImpact summary: A use-after-free may result in process crashes, heap\ncorruption, or potentially remote code execution.\n\nWhen processing a PKCS#7 or S/MIME signed message, if the SignedData\ndigestAlgorithms field is present as an empty ASN.1 SET, OpenSSL may\nincorrectly free a caller-owned BIO during PKCS7_verify(). A subsequent\nuse of the BIO by the calling application results in a use-after-free\ncondition.\n\nIn the common case this occurs when the application later calls\nBIO_free() on the BIO originally passed to PKCS7_verify(). Depending\non allocator behavior and application-specific BIO usage patterns, this\nmay result in a crash or other memory corruption. In some application\ncontexts this may potentially be exploitable for remote code execution.\n\nApplications that process PKCS#7 or S/MIME signed messages using OpenSSL\nPKCS#7 APIs may be affected. Applications using the CMS APIs for this\nprocessing are not affected.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this\nissue, as the affected code is outside the OpenSSL FIPS module boundary.(CVE-2026-45447)\n\nIssue summary: A signed integer overflow when sizing the destination\nbuffer for Unicode output in ASN1_mbstring_ncopy() can lead to a heap\nbuffer overflow.\n\nImpact summary: A heap buffer overflow may lead to a crash or possibly\nattacker controlled code execution or other undefined behaviour.\n\nIn ASN1_mbstring_copy() and ASN1_mbstring_ncopy() the destination\nsize for Unicode output is computed in a signed int: by left shift\nof the input character count for BMPSTRING (UTF-16) and\nUNIVERSALSTRING (UTF-32), and by summing per-character byte counts\nfor UTF8STRING. The calculation overflows when the input reaches\naround 2^30 characters. In the worst case (UNIVERSALSTRING at 2^30\ncharacters) the size wraps to zero, OPENSSL_malloc(1) is called, and\nthe subsequent character copy writes several gigabytes past the\none-byte allocation.\n\nX.509 certificate processing routes through ASN1_STRING_set_by_NID(),\nwhose DIRSTRING_TYPE mask excludes UNIVERSALSTRING and whose per-NID\nsize limits cap the input length; no network protocol or\ncertificate-handling path in OpenSSL exercises the overflow.\nTriggering the bug requires an application that calls\nASN1_mbstring_copy() or ASN1_mbstring_ncopy() directly, or registers\na custom string type via ASN1_STRING_TABLE_add(), with\nattacker-controlled input on the order of half a gigabyte or more.\nFor these reasons this issue was assigned Low severity.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4 and 3.0 are not affected by\nthis issue, as the affected code is outside the OpenSSL FIPS module\nboundary.(CVE-2026-7383)",
				"category":"general",
				"title":"Description"
			},
			{
				"text":"An update for shim is now available for openEuler-24.03-LTS-SP3,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS-SP1.\n\nopenEuler Security has rated this update as having a security impact of high. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section.",
				"category":"general",
				"title":"Topic"
			},
			{
				"text":"High",
				"category":"general",
				"title":"Severity"
			},
			{
				"text":"shim",
				"category":"general",
				"title":"Affected Component"
			}
		],
		"publisher":{
			"issuing_authority":"openEuler security committee",
			"name":"openEuler",
			"namespace":"https://www.openeuler.org",
			"contact_details":"openeuler-security@openeuler.org",
			"category":"vendor"
		},
		"references":[
			{
				"summary":"openEuler-SA-2026-2750",
				"category":"self",
				"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2750"
			},
			{
				"summary":"CVE-2026-34180",
				"category":"self",
				"url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-34180&packageName=shim"
			},
			{
				"summary":"CVE-2026-45447",
				"category":"self",
				"url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-45447&packageName=shim"
			},
			{
				"summary":"CVE-2026-7383",
				"category":"self",
				"url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-7383&packageName=shim"
			},
			{
				"summary":"nvd cve",
				"category":"external",
				"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34180"
			},
			{
				"summary":"nvd cve",
				"category":"external",
				"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45447"
			},
			{
				"summary":"nvd cve",
				"category":"external",
				"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-7383"
			},
			{
				"summary":"openEuler-SA-2026-2750 vex file",
				"category":"self",
				"url":"https://repo.openeuler.org/security/data/csaf/advisories/2026/csaf-openeuler-sa-2026-2750.json"
			}
		],
		"title":"An update for shim is now available for openEuler-24.03-LTS-SP3,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS-SP1",
		"tracking":{
			"initial_release_date":"2026-06-30T20:09:22+08:00",
			"revision_history":[
				{
					"date":"2026-06-30T20:09:22+08:00",
					"summary":"Initial",
					"number":"1.0.0"
				}
			],
			"generator":{
				"date":"2026-06-30T20:09:22+08:00",
				"engine":{
					"name":"openEuler CSAF Tool V1.0"
				}
			},
			"current_release_date":"2026-06-30T20:09:22+08:00",
			"id":"openEuler-SA-2026-2750",
			"version":"1.0.0",
			"status":"final"
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				{
					"text":"Issue summary: Parsing a crafted DER-encoded ASN.1 structure with a primitive\nelement whose content exceeds 2 gigabytes in length may cause a heap buffer\nover-read on 64-bit Unix and Unix-like platforms.\n\nImpact summary: The heap buffer over-read may crash the application (Denial of\nService) or to load into the decoded ASN.1 object contents of memory beyond the\nend of the input buffer.  More typically such ASN.1 elements would instead be\ntruncated.\n\nAn integer truncation in OpenSSL's ASN.1 decoder causes the content length of\nan ASN.1 primitive element to be mishandled when it exceeds 2 gigabytes. In the\nworst case the truncated length is treated as a request to scan the binary\ncontent for a terminating zero byte, possibly causing OpenSSL to read either\nless than or beyond the end of the allocated buffer.\n\nApplications that pass attacker-supplied data to d2i_X509(), d2i_PKCS7(), or\nany other d2i_* decoding function are affected. OpenSSL's own command-line\ntools are not vulnerable, as data read through the BIO layer is checked before\nit reaches the affected code. The issue only affects 64-bit Unix and Unix-like\nplatforms; 32-bit platforms and 64-bit Windows are not affected.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4 and 3.0 are not affected by this issue,\nas the affected code is outside the OpenSSL FIPS module boundary.",
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					"title":"Vulnerability Description"
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						"openEuler-24.03-LTS-SP3:shim-debuginfo-15.7-27.oe2403sp3.aarch64",
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						"openEuler-22.03-LTS-SP4:shim-debugsource-15.6-31.oe2203sp4.aarch64",
						"openEuler-24.03-LTS-SP1:shim-15.7-27.oe2403sp1.aarch64",
						"openEuler-24.03-LTS-SP1:shim-debuginfo-15.7-27.oe2403sp1.aarch64",
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						"openEuler-24.03-LTS-SP1:shim-signed-15.7-27.oe2403sp1.aarch64"
					],
					"details":"shim security update",
					"category":"vendor_fix",
					"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2750"
				}
			],
			"scores":[
				{
					"cvss_v3":{
						"baseSeverity":"HIGH",
						"baseScore":7.5,
						"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
						"version":"3.1"
					},
					"products":[
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						"openEuler-20.03-LTS-SP4:shim-15-42.oe2003sp4.aarch64",
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						"openEuler-22.03-LTS-SP4:shim-debuginfo-15.6-31.oe2203sp4.aarch64",
						"openEuler-22.03-LTS-SP4:shim-debugsource-15.6-31.oe2203sp4.aarch64",
						"openEuler-24.03-LTS-SP1:shim-15.7-27.oe2403sp1.aarch64",
						"openEuler-24.03-LTS-SP1:shim-debuginfo-15.7-27.oe2403sp1.aarch64",
						"openEuler-24.03-LTS-SP1:shim-debugsource-15.7-27.oe2403sp1.aarch64",
						"openEuler-24.03-LTS-SP1:shim-signed-15.7-27.oe2403sp1.aarch64"
					]
				}
			],
			"threats":[
				{
					"details":"High",
					"category":"impact"
				}
			],
			"title":"CVE-2026-34180"
		},
		{
			"cve":"CVE-2026-45447",
			"notes":[
				{
					"text":"Issue summary: A specially crafted PKCS#7 or S/MIME signed message could\ntrigger a use-after-free during PKCS#7 signature verification.\n\nImpact summary: A use-after-free may result in process crashes, heap\ncorruption, or potentially remote code execution.\n\nWhen processing a PKCS#7 or S/MIME signed message, if the SignedData\ndigestAlgorithms field is present as an empty ASN.1 SET, OpenSSL may\nincorrectly free a caller-owned BIO during PKCS7_verify(). A subsequent\nuse of the BIO by the calling application results in a use-after-free\ncondition.\n\nIn the common case this occurs when the application later calls\nBIO_free() on the BIO originally passed to PKCS7_verify(). Depending\non allocator behavior and application-specific BIO usage patterns, this\nmay result in a crash or other memory corruption. In some application\ncontexts this may potentially be exploitable for remote code execution.\n\nApplications that process PKCS#7 or S/MIME signed messages using OpenSSL\nPKCS#7 APIs may be affected. Applications using the CMS APIs for this\nprocessing are not affected.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this\nissue, as the affected code is outside the OpenSSL FIPS module boundary.",
					"category":"description",
					"title":"Vulnerability Description"
				}
			],
			"product_status":{
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			"remediations":[
				{
					"product_ids":[
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						"openEuler-24.03-LTS-SP1:shim-15.7-27.oe2403sp1.aarch64",
						"openEuler-24.03-LTS-SP1:shim-debuginfo-15.7-27.oe2403sp1.aarch64",
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					],
					"details":"shim security update",
					"category":"vendor_fix",
					"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2750"
				}
			],
			"scores":[
				{
					"cvss_v3":{
						"baseSeverity":"HIGH",
						"baseScore":8.8,
						"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
						"version":"3.1"
					},
					"products":[
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						"openEuler-24.03-LTS-SP1:shim-15.7-27.oe2403sp1.aarch64",
						"openEuler-24.03-LTS-SP1:shim-debuginfo-15.7-27.oe2403sp1.aarch64",
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					]
				}
			],
			"threats":[
				{
					"details":"High",
					"category":"impact"
				}
			],
			"title":"CVE-2026-45447"
		},
		{
			"cve":"CVE-2026-7383",
			"notes":[
				{
					"text":"Issue summary: A signed integer overflow when sizing the destination\nbuffer for Unicode output in ASN1_mbstring_ncopy() can lead to a heap\nbuffer overflow.\n\nImpact summary: A heap buffer overflow may lead to a crash or possibly\nattacker controlled code execution or other undefined behaviour.\n\nIn ASN1_mbstring_copy() and ASN1_mbstring_ncopy() the destination\nsize for Unicode output is computed in a signed int: by left shift\nof the input character count for BMPSTRING (UTF-16) and\nUNIVERSALSTRING (UTF-32), and by summing per-character byte counts\nfor UTF8STRING. The calculation overflows when the input reaches\naround 2^30 characters. In the worst case (UNIVERSALSTRING at 2^30\ncharacters) the size wraps to zero, OPENSSL_malloc(1) is called, and\nthe subsequent character copy writes several gigabytes past the\none-byte allocation.\n\nX.509 certificate processing routes through ASN1_STRING_set_by_NID(),\nwhose DIRSTRING_TYPE mask excludes UNIVERSALSTRING and whose per-NID\nsize limits cap the input length; no network protocol or\ncertificate-handling path in OpenSSL exercises the overflow.\nTriggering the bug requires an application that calls\nASN1_mbstring_copy() or ASN1_mbstring_ncopy() directly, or registers\na custom string type via ASN1_STRING_TABLE_add(), with\nattacker-controlled input on the order of half a gigabyte or more.\nFor these reasons this issue was assigned Low severity.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4 and 3.0 are not affected by\nthis issue, as the affected code is outside the OpenSSL FIPS module\nboundary.",
					"category":"description",
					"title":"Vulnerability Description"
				}
			],
			"product_status":{
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					"openEuler-22.03-LTS-SP4:shim-15.6-31.oe2203sp4.aarch64",
					"openEuler-22.03-LTS-SP4:shim-debuginfo-15.6-31.oe2203sp4.aarch64",
					"openEuler-22.03-LTS-SP4:shim-debugsource-15.6-31.oe2203sp4.aarch64",
					"openEuler-24.03-LTS-SP1:shim-15.7-27.oe2403sp1.aarch64",
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					"openEuler-24.03-LTS-SP1:shim-signed-15.7-27.oe2403sp1.aarch64"
				]
			},
			"remediations":[
				{
					"product_ids":[
						"openEuler-24.03-LTS-SP3:shim-15.7-27.oe2403sp3.src",
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						"openEuler-22.03-LTS-SP4:shim-15.6-31.oe2203sp4.src",
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						"openEuler-24.03-LTS-SP1:shim-signed-15.7-27.oe2403sp1.x86_64",
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						"openEuler-20.03-LTS-SP4:shim-debugsource-15-42.oe2003sp4.noarch",
						"openEuler-24.03-LTS-SP3:shim-15.7-27.oe2403sp3.aarch64",
						"openEuler-24.03-LTS-SP3:shim-debuginfo-15.7-27.oe2403sp3.aarch64",
						"openEuler-24.03-LTS-SP3:shim-debugsource-15.7-27.oe2403sp3.aarch64",
						"openEuler-24.03-LTS-SP3:shim-signed-15.7-27.oe2403sp3.aarch64",
						"openEuler-20.03-LTS-SP4:shim-15-42.oe2003sp4.aarch64",
						"openEuler-22.03-LTS-SP4:shim-15.6-31.oe2203sp4.aarch64",
						"openEuler-22.03-LTS-SP4:shim-debuginfo-15.6-31.oe2203sp4.aarch64",
						"openEuler-22.03-LTS-SP4:shim-debugsource-15.6-31.oe2203sp4.aarch64",
						"openEuler-24.03-LTS-SP1:shim-15.7-27.oe2403sp1.aarch64",
						"openEuler-24.03-LTS-SP1:shim-debuginfo-15.7-27.oe2403sp1.aarch64",
						"openEuler-24.03-LTS-SP1:shim-debugsource-15.7-27.oe2403sp1.aarch64",
						"openEuler-24.03-LTS-SP1:shim-signed-15.7-27.oe2403sp1.aarch64"
					],
					"details":"shim security update",
					"category":"vendor_fix",
					"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2750"
				}
			],
			"scores":[
				{
					"cvss_v3":{
						"baseSeverity":"HIGH",
						"baseScore":8.1,
						"vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
						"version":"3.1"
					},
					"products":[
						"openEuler-24.03-LTS-SP3:shim-15.7-27.oe2403sp3.src",
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						"openEuler-22.03-LTS-SP4:shim-15.6-31.oe2203sp4.src",
						"openEuler-24.03-LTS-SP1:shim-15.7-27.oe2403sp1.src",
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						"openEuler-20.03-LTS-SP4:shim-debuginfo-15-42.oe2003sp4.noarch",
						"openEuler-20.03-LTS-SP4:shim-debugsource-15-42.oe2003sp4.noarch",
						"openEuler-24.03-LTS-SP3:shim-15.7-27.oe2403sp3.aarch64",
						"openEuler-24.03-LTS-SP3:shim-debuginfo-15.7-27.oe2403sp3.aarch64",
						"openEuler-24.03-LTS-SP3:shim-debugsource-15.7-27.oe2403sp3.aarch64",
						"openEuler-24.03-LTS-SP3:shim-signed-15.7-27.oe2403sp3.aarch64",
						"openEuler-20.03-LTS-SP4:shim-15-42.oe2003sp4.aarch64",
						"openEuler-22.03-LTS-SP4:shim-15.6-31.oe2203sp4.aarch64",
						"openEuler-22.03-LTS-SP4:shim-debuginfo-15.6-31.oe2203sp4.aarch64",
						"openEuler-22.03-LTS-SP4:shim-debugsource-15.6-31.oe2203sp4.aarch64",
						"openEuler-24.03-LTS-SP1:shim-15.7-27.oe2403sp1.aarch64",
						"openEuler-24.03-LTS-SP1:shim-debuginfo-15.7-27.oe2403sp1.aarch64",
						"openEuler-24.03-LTS-SP1:shim-debugsource-15.7-27.oe2403sp1.aarch64",
						"openEuler-24.03-LTS-SP1:shim-signed-15.7-27.oe2403sp1.aarch64"
					]
				}
			],
			"threats":[
				{
					"details":"High",
					"category":"impact"
				}
			],
			"title":"CVE-2026-7383"
		}
	]
}