{"id":"CVE-2023-53543","title":"vdpa: Add max vqp attr to vdpa_nl_policy for nlattr length check","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nvdpa: Add max vqp attr to vdpa_nl_policy for nlattr length check\n\nThe vdpa_nl_policy structure is used to validate the nlattr when parsing\nthe incoming nlmsg. It will e…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 447092100c7e71aa20469a270fcee441d807ed58 < baed19c108ac8287425b93a44985bbe9a0b1af8d","Linux >= ad69dd0bf26b88ec6ab26f8bbe5cd74fbed7672a < ff71709445ac033e6e250d971683110e4781c068","Linux >= ad69dd0bf26b88ec6ab26f8bbe5cd74fbed7672a < ea65e8b5e6b1a34deda7564f09c90e9e80db436a","Linux >= ad69dd0bf26b88ec6ab26f8bbe5cd74fbed7672a < 5d6ba607d6cb5c58a4ddf33381e18c83dbb4098f","Linux >= 5.15.198 < 5.15.209","Linux 5.16"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:23:31.778108Z"},"published":"2025-10-04","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:31:14.195Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53543","references":[{"url":"https://git.kernel.org/stable/c/baed19c108ac8287425b93a44985bbe9a0b1af8d"},{"url":"https://git.kernel.org/stable/c/ff71709445ac033e6e250d971683110e4781c068"},{"url":"https://git.kernel.org/stable/c/ea65e8b5e6b1a34deda7564f09c90e9e80db436a"},{"url":"https://git.kernel.org/stable/c/5d6ba607d6cb5c58a4ddf33381e18c83dbb4098f"}],"tags":["cve.org"],"epss":0.00169,"epssPercentile":0.06282,"ingestedAt":"2026-11-05T22:38:31.809Z","slug":"CVE-2023-53543","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nvdpa: Add max vqp attr to vdpa_nl_policy for nlattr length check\n\nThe vdpa_nl_policy structure is used to validate the nlattr when parsing\nthe incoming nlmsg. It will ensure the attribute being described produces\na valid nlattr pointer in info->attrs before entering into each handler\nin vdpa_nl_ops.\n\nThat is to say, the missing part in vdpa_nl_policy may lead to illegal\nnlattr after parsing, which could lead to OOB read just like CVE-2023-3773.\n\nThis patch adds the missing nla_policy for vdpa max vqp attr to avoid\nsuch bugs.\n\n## Affected\n\n- `Linux >= 447092100c7e71aa20469a270fcee441d807ed58 < baed19c108ac8287425b93a44985bbe9a0b1af8d`\n- `Linux >= ad69dd0bf26b88ec6ab26f8bbe5cd74fbed7672a < ff71709445ac033e6e250d971683110e4781c068`\n- `Linux >= ad69dd0bf26b88ec6ab26f8bbe5cd74fbed7672a < ea65e8b5e6b1a34deda7564f09c90e9e80db436a`\n- `Linux >= ad69dd0bf26b88ec6ab26f8bbe5cd74fbed7672a < 5d6ba607d6cb5c58a4ddf33381e18c83dbb4098f`\n- `Linux >= 5.15.198 < 5.15.209`\n- `Linux 5.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}