{ "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":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dcb: choose correct policy to parse DCB_ATTR_BCN\n\nThe dcbnl_bcn_setcfg uses erroneous policy to parse tb[DCB_ATTR_BCN],\nwhich is introduced in commit 859ee3c43812 (\"DCB: Add support for DCB\nBCN\"). Please see the comment in below code\n\nstatic int dcbnl_bcn_setcfg(...)\n{\n ...\n ret = nla_parse_nested_deprecated(..., dcbnl_pfc_up_nest, .. )\n // !!! dcbnl_pfc_up_nest for attributes\n // DCB_PFC_UP_ATTR_0 to DCB_PFC_UP_ATTR_ALL in enum dcbnl_pfc_up_attrs\n ...\n for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {\n // !!! DCB_BCN_ATTR_RP_0 to DCB_BCN_ATTR_RP_7 in enum dcbnl_bcn_attrs\n ...\n value_byte = nla_get_u8(data[i]);\n ...\n }\n ...\n for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {\n // !!! DCB_BCN_ATTR_BCNA_0 to DCB_BCN_ATTR_RI in enum dcbnl_bcn_attrs\n ...\n value_int = nla_get_u32(data[i]);\n ...\n }\n ...\n}\n\nThat is, the nla_parse_nested_deprecated uses dcbnl_pfc_up_nest\nattributes to parse nlattr defined in dcbnl_pfc_up_attrs. But the\nfollowing access code fetch each nlattr as dcbnl_bcn_attrs attributes.\nBy looking up the associated nla_policy for dcbnl_bcn_attrs. We can find\nthe beginning part of these two policies are \"same\".\n\nstatic const struct nla_policy dcbnl_pfc_up_nest[...] = {\n [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},\n};\n\nstatic const struct nla_policy dcbnl_bcn_nest[...] = {\n [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},\n // from here is somewhat different\n [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32},\n ...\n [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},\n};\n\nTherefore, the current code is buggy and this\nnla_parse_nested_deprecated could overflow the dcbnl_pfc_up_nest and use\nthe adjacent nla_policy to parse attributes from DCB_BCN_ATTR_BCNA_0.\n\nHence use the correct policy dcbnl_bcn_nest to parse the nested\ntb[DCB_ATTR_BCN] TLV.", "category":"general", "title":"Synopsis" } ], "publisher":{ "issuing_authority":"openEuler security committee", "name":"openEuler", "namespace":"https://www.openeuler.org", "contact_details":"openeuler-security@openeuler.org", "category":"vendor" }, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53369" }, { "summary":"CVE-2023-53369 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2023/csaf-openeuler-cve-2023-53369.json" }, { "summary":"openEuler-SA-2025-2407", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2407" }, { "summary":"CVE-2023-53369", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2023-53369&packageName=kernel" } ], "title":"openEuler cve CVE-2023-53369", "tracking":{ "initial_release_date":"2025-10-11T21:22:59+08:00", "revision_history":[ { "date":"2025-10-11T21:22:59+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2025-10-11T21:22:59+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2025-10-11T21:22:59+08:00", "id":"CVE-2023-53369", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP3" }, "product_id":"openEuler-22.03-LTS-SP3", "name":"openEuler-22.03-LTS-SP3" }, 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Please see the comment in below code\n\nstatic int dcbnl_bcn_setcfg(...)\n{\n ...\n ret = nla_parse_nested_deprecated(..., dcbnl_pfc_up_nest, .. )\n // !!! dcbnl_pfc_up_nest for attributes\n // DCB_PFC_UP_ATTR_0 to DCB_PFC_UP_ATTR_ALL in enum dcbnl_pfc_up_attrs\n ...\n for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {\n // !!! DCB_BCN_ATTR_RP_0 to DCB_BCN_ATTR_RP_7 in enum dcbnl_bcn_attrs\n ...\n value_byte = nla_get_u8(data[i]);\n ...\n }\n ...\n for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {\n // !!! DCB_BCN_ATTR_BCNA_0 to DCB_BCN_ATTR_RI in enum dcbnl_bcn_attrs\n ...\n value_int = nla_get_u32(data[i]);\n ...\n }\n ...\n}\n\nThat is, the nla_parse_nested_deprecated uses dcbnl_pfc_up_nest\nattributes to parse nlattr defined in dcbnl_pfc_up_attrs. But the\nfollowing access code fetch each nlattr as dcbnl_bcn_attrs attributes.\nBy looking up the associated nla_policy for dcbnl_bcn_attrs. We can find\nthe beginning part of these two policies are \"same\".\n\nstatic const struct nla_policy dcbnl_pfc_up_nest[...] = {\n [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},\n [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},\n};\n\nstatic const struct nla_policy dcbnl_bcn_nest[...] = {\n [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},\n [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},\n // from here is somewhat different\n [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32},\n ...\n [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},\n};\n\nTherefore, the current code is buggy and this\nnla_parse_nested_deprecated could overflow the dcbnl_pfc_up_nest and use\nthe adjacent nla_policy to parse attributes from DCB_BCN_ATTR_BCNA_0.\n\nHence use the correct policy dcbnl_bcn_nest to parse the nested\ntb[DCB_ATTR_BCN] TLV.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-22.03-LTS-SP3:kernel-5.10.0-284.0.0.186.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-debuginfo-5.10.0-284.0.0.186.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-debugsource-5.10.0-284.0.0.186.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-devel-5.10.0-284.0.0.186.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-headers-5.10.0-284.0.0.186.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-source-5.10.0-284.0.0.186.oe2203sp3.aarch64", 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"category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2407" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"MEDIUM", "baseScore":5.5, "vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version":"3.1" }, "products":[ "openEuler-22.03-LTS-SP3:kernel-5.10.0-284.0.0.186.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-debuginfo-5.10.0-284.0.0.186.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-debugsource-5.10.0-284.0.0.186.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-devel-5.10.0-284.0.0.186.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-headers-5.10.0-284.0.0.186.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-source-5.10.0-284.0.0.186.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-tools-5.10.0-284.0.0.186.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-tools-debuginfo-5.10.0-284.0.0.186.oe2203sp3.aarch64", 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"openEuler-22.03-LTS-SP3:kernel-tools-debuginfo-5.10.0-284.0.0.186.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:kernel-tools-devel-5.10.0-284.0.0.186.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:perf-5.10.0-284.0.0.186.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:perf-debuginfo-5.10.0-284.0.0.186.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:python3-perf-5.10.0-284.0.0.186.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:python3-perf-debuginfo-5.10.0-284.0.0.186.oe2203sp3.x86_64" ] } ], "threats":[ { "details":"Medium", "category":"impact" } ], "title":"CVE-2023-53369" } ] }