Kernel memory disclosure via unvalidated vDPA attribute
Published Oct 4, 2025 · Updated Oct 4, 2025
Out-of-bounds access in Linux kernel vDPA allows local users to read kernel memory via a malformed maximum-VQP netlink attribute. The vdpa_nl_policy table omits validation for VDPA_ATTR_DEV_NET_CFG_MAX_VQP, so parsing can place an invalid nlattr pointer in info->attrs before vdpa_nl_ops handlers use it. Exploitation requires low-privilege local access and a reachable vDPA netlink path; the disclosed consequence is an out-of-bounds kernel read.
Summary
What happened
Out-of-bounds access in Linux kernel vDPA allows local users to read kernel memory via a malformed maximum-VQP netlink attribute. The vdpa_nl_policy table omits validation for VDPA_ATTR_DEV_NET_CFG_MAX_VQP, so parsing can place an invalid nlattr pointer in info->attrs before vdpa_nl_ops handlers use it. Exploitation requires low-privilege local access and a reachable vDPA netlink path; the disclosed consequence is an out-of-bounds kernel read.
The record
- CVE
- CVE-2023-53543
- Published
- Oct 4, 2025
- Updated
- Oct 4, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-787
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 4, 2025CVE publishedPublication date reported by the CVE source.
- Oct 4, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=5.16
- Affected versionversion=ad69dd0bf26b88ec6ab26f8bbe5cd74fbed7672a <5d6ba607d6cb5c58a4ddf33381e18c83dbb4098f
- Affected versionversion=ad69dd0bf26b88ec6ab26f8bbe5cd74fbed7672a <ea65e8b5e6b1a34deda7564f09c90e9e80db436a
- Affected versionversion=ad69dd0bf26b88ec6ab26f8bbe5cd74fbed7672a <ff71709445ac033e6e250d971683110e4781c068
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What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
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Your stack
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