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CVE-2023-53369 (GCVE-0-2023-53369)

Vulnerability from cvelistv5 – Published: 2025-09-18 13:33 – Updated: 2026-05-11 19:43
VLAI
Title
net: dcb: choose correct policy to parse DCB_ATTR_BCN
Summary
In the Linux kernel, the following vulnerability has been resolved: net: dcb: choose correct policy to parse DCB_ATTR_BCN The dcbnl_bcn_setcfg uses erroneous policy to parse tb[DCB_ATTR_BCN], which is introduced in commit 859ee3c43812 ("DCB: Add support for DCB BCN"). Please see the comment in below code static int dcbnl_bcn_setcfg(...) { ... ret = nla_parse_nested_deprecated(..., dcbnl_pfc_up_nest, .. ) // !!! dcbnl_pfc_up_nest for attributes // DCB_PFC_UP_ATTR_0 to DCB_PFC_UP_ATTR_ALL in enum dcbnl_pfc_up_attrs ... for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) { // !!! DCB_BCN_ATTR_RP_0 to DCB_BCN_ATTR_RP_7 in enum dcbnl_bcn_attrs ... value_byte = nla_get_u8(data[i]); ... } ... for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) { // !!! DCB_BCN_ATTR_BCNA_0 to DCB_BCN_ATTR_RI in enum dcbnl_bcn_attrs ... value_int = nla_get_u32(data[i]); ... } ... } That is, the nla_parse_nested_deprecated uses dcbnl_pfc_up_nest attributes to parse nlattr defined in dcbnl_pfc_up_attrs. But the following access code fetch each nlattr as dcbnl_bcn_attrs attributes. By looking up the associated nla_policy for dcbnl_bcn_attrs. We can find the beginning part of these two policies are "same". static const struct nla_policy dcbnl_pfc_up_nest[...] = { [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG}, }; static const struct nla_policy dcbnl_bcn_nest[...] = { [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG}, // from here is somewhat different [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32}, ... [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG}, }; Therefore, the current code is buggy and this nla_parse_nested_deprecated could overflow the dcbnl_pfc_up_nest and use the adjacent nla_policy to parse attributes from DCB_BCN_ATTR_BCNA_0. Hence use the correct policy dcbnl_bcn_nest to parse the nested tb[DCB_ATTR_BCN] TLV.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:53 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 859ee3c43812051e21816c6d6d4cc04fb7ce9b2e , < 5b3dbedb8d4a0f9f7ce904d76b885438af2a21f9 (git)
Affected: 859ee3c43812051e21816c6d6d4cc04fb7ce9b2e , < 8e309f43d0ca4051d20736c06a6f84bbddd881da (git)
Affected: 859ee3c43812051e21816c6d6d4cc04fb7ce9b2e , < a0da2684db18dead3bcee12fb185e596e3d63c2b (git)
Affected: 859ee3c43812051e21816c6d6d4cc04fb7ce9b2e , < ecff20e193207b44fdbfe64d7de89890f0a7fe6c (git)
Affected: 859ee3c43812051e21816c6d6d4cc04fb7ce9b2e , < 199fde04bd875d28b3a5ca525eaaa004eec6e947 (git)
Affected: 859ee3c43812051e21816c6d6d4cc04fb7ce9b2e , < 31d49ba033095f6e8158c60f69714a500922e0c3 (git)
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Linux Linux Affected: 2.6.29
Unaffected: 0 , < 2.6.29 (semver)
Unaffected: 5.4.253 , ≤ 5.4.* (semver)
Unaffected: 5.10.190 , ≤ 5.10.* (semver)
Unaffected: 5.15.126 , ≤ 5.15.* (semver)
Unaffected: 6.1.45 , ≤ 6.1.* (semver)
Unaffected: 6.4.10 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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          "value": "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 \u003c= 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 \u003c= 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."
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    "dateUpdated": "2026-05-11T19:43:36.996Z",
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      "date": "2026-09-16",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53369\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-18T14:15:39.373\",\"lastModified\":\"2026-06-17T06:45:07.470\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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 \u003c= 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 \u003c= 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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/dcb/dcbnl.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\",\"lessThan\":\"5b3dbedb8d4a0f9f7ce904d76b885438af2a21f9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\",\"lessThan\":\"8e309f43d0ca4051d20736c06a6f84bbddd881da\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\",\"lessThan\":\"a0da2684db18dead3bcee12fb185e596e3d63c2b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\",\"lessThan\":\"ecff20e193207b44fdbfe64d7de89890f0a7fe6c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\",\"lessThan\":\"199fde04bd875d28b3a5ca525eaaa004eec6e947\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\",\"lessThan\":\"31d49ba033095f6e8158c60f69714a500922e0c3\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/dcb/dcbnl.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.29\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.29\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.253\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.190\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.126\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.45\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.4.10\",\"lessThanOrEqual\":\"6.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.5\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"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:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-01-14T18:53:02.602085Z\",\"id\":\"CVE-2023-53369\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.29\",\"versionEndExcluding\":\"5.4.253\",\"matchCriteriaId\":\"C7A64ABD-5BA1-487F-8A10-22A00633C674\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.190\",\"matchCriteriaId\":\"B8DECE4F-2D62-4976-B338-963015198AC8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.126\",\"matchCriteriaId\":\"C552AC9E-23B8-4D7D-AA26-57985BD93962\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.45\",\"matchCriteriaId\":\"A0CA013D-55AF-4494-A931-AFC8EA64E875\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.4.10\",\"matchCriteriaId\":\"7BB0D94C-4FCE-46F4-A8D4-062D6A84627A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"0B3E6E4D-E24E-4630-B00C-8C9901C597B0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"E4A01A71-0F09-4DB2-A02F-7EFFBE27C98D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F5608371-157A-4318-8A2E-4104C3467EA1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"2226A776-DF8C-49E0-A030-0A7853BB018A\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/199fde04bd875d28b3a5ca525eaaa004eec6e947\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/31d49ba033095f6e8158c60f69714a500922e0c3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5b3dbedb8d4a0f9f7ce904d76b885438af2a21f9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8e309f43d0ca4051d20736c06a6f84bbddd881da\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a0da2684db18dead3bcee12fb185e596e3d63c2b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ecff20e193207b44fdbfe64d7de89890f0a7fe6c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:31:01+00:00",
      "cve": "CVE-2023-53369",
      "id": "CVE-2023-53369",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: dcb: choose correct policy to parse DCB_ATTR_BCN",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53369.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T16:47:25Z",
      "cve": "CVE-2023-53369",
      "id": "CVE-2023-53369",
      "initial_release_date": "2025-09-19T23:34:33Z",
      "product_status:known_affected": "657",
      "product_status:known_not_affected": "87",
      "product_status:recommended": "347",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53369",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53369.json",
      "version": "55"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-53369\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T18:53:02.602085Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"description\": \"CWE-noinfo Not enough information\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T18:52:56.756Z\"}}], \"cna\": {\"title\": \"net: dcb: choose correct policy to parse DCB_ATTR_BCN\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\", \"lessThan\": \"5b3dbedb8d4a0f9f7ce904d76b885438af2a21f9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\", \"lessThan\": \"8e309f43d0ca4051d20736c06a6f84bbddd881da\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\", \"lessThan\": \"a0da2684db18dead3bcee12fb185e596e3d63c2b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\", \"lessThan\": \"ecff20e193207b44fdbfe64d7de89890f0a7fe6c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\", \"lessThan\": \"199fde04bd875d28b3a5ca525eaaa004eec6e947\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\", \"lessThan\": \"31d49ba033095f6e8158c60f69714a500922e0c3\", \"versionType\": \"git\"}], \"programFiles\": [\"net/dcb/dcbnl.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.29\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.29\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.253\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.190\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.126\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.45\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.4.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.4.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/dcb/dcbnl.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5b3dbedb8d4a0f9f7ce904d76b885438af2a21f9\"}, {\"url\": \"https://git.kernel.org/stable/c/8e309f43d0ca4051d20736c06a6f84bbddd881da\"}, {\"url\": \"https://git.kernel.org/stable/c/a0da2684db18dead3bcee12fb185e596e3d63c2b\"}, {\"url\": \"https://git.kernel.org/stable/c/ecff20e193207b44fdbfe64d7de89890f0a7fe6c\"}, {\"url\": \"https://git.kernel.org/stable/c/199fde04bd875d28b3a5ca525eaaa004eec6e947\"}, {\"url\": \"https://git.kernel.org/stable/c/31d49ba033095f6e8158c60f69714a500922e0c3\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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 \u003c= 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 \u003c= 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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.253\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.190\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.126\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.45\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4.10\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5\", \"versionStartIncluding\": \"2.6.29\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:43:36.996Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-53369\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:43:36.996Z\", \"dateReserved\": \"2025-09-17T14:54:09.734Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-18T13:33:17.384Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.