CVE-2023-53543

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux447092100c7e71aa20469a270fcee441d807ed58 < baed19c108ac8287425b93a44985bbe9a0b1af8daffected
LinuxLinuxad69dd0bf26b88ec6ab26f8bbe5cd74fbed7672a < ff71709445ac033e6e250d971683110e4781c068affected
LinuxLinuxad69dd0bf26b88ec6ab26f8bbe5cd74fbed7672a < ea65e8b5e6b1a34deda7564f09c90e9e80db436aaffected
LinuxLinuxad69dd0bf26b88ec6ab26f8bbe5cd74fbed7672a < 5d6ba607d6cb5c58a4ddf33381e18c83dbb4098faffected
LinuxLinux5.15.198 < 5.15.209affected
LinuxLinux5.16affected
LinuxLinux0 < 5.16unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.47 <= 6.1.*unaffected
LinuxLinux6.4.12 <= 6.4.*unaffected
LinuxLinux6.5 <= *unaffected

Weaknesses

References