CVE-2023-54031
Description
In the Linux kernel, the following vulnerability has been resolved: vdpa: Add queue index 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 queue index attr to avoid such bugs.
How to fix
- Linux Linux8ad9bc25cbdcec72e7ca43dd8281decb69ea9a70, ccb533b7070aeeb65c66ea5d590e9c62421dcd61, b3003e1b54e057f5f3124e437b80c3bef26ed3fe or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 13b00b135665c92065a27c0c39dd97e0f380bd4f ≤ v < 8ad9bc25cbdcec72e7ca43dd8281decb69ea9a70, 13b00b135665c92065a27c0c39dd97e0f380bd4f ≤ v < ccb533b7070aeeb65c66ea5d590e9c62421dcd61, 13b00b135665c92065a27c0c39dd97e0f380bd4f ≤ v < b3003e1b54e057f5f3124e437b80c3bef26ed3fe, 5.19 | 8ad9bc25cbdcec72e7ca43dd8281decb69ea9a70, ccb533b7070aeeb65c66ea5d590e9c62421dcd61, b3003e1b54e057f5f3124e437b80c3bef26ed3fe |
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