CVE-2023-53543
Description
In the Linux kernel, the following vulnerability has been resolved: vdpa: Add max vqp attr to vdpa_nl_policy for nlattr length check The vdpa_nl_policy structure is used to validate the nlattr when parsing the incoming nlmsg. It will ensure the attribute being described produces a valid nlattr pointer in info->attrs before entering into each handler in vdpa_nl_ops. That is to say, the missing part in vdpa_nl_policy may lead to illegal nlattr after parsing, which could lead to OOB read just like CVE-2023-3773. This patch adds the missing nla_policy for vdpa max vqp attr to avoid such bugs.
How to fix
- linux linux_kernel5.15.209, 6.1.47, 6.4.12 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.15.198 ≤ v < 5.15.209, 5.16 ≤ v < 6.1.47, 6.2 ≤ v < 6.4.12, 6.5 | 5.15.209, 6.1.47, 6.4.12 |
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