CVE-2023-53456

In the Linux kernel, the following vulnerability has been resolved:

scsi: qla4xxx: Add length check when parsing nlattrs

There are three places that qla4xxx parses nlattrs:

• qla4xxx_set_chap_entry()

• qla4xxx_iface_set_param()

• qla4xxx_sysfs_ddb_set_param()

and each of them directly converts the nlattr to specific pointer of structure without length checking. This could be dangerous as those attributes are not validated and a malformed nlattr (e.g., length 0) could result in an OOB read that leaks heap dirty data.

Add the nla_len check before accessing the nlattr data and return EINVAL if the length check fails.

Affected Software

References

• https://git.kernel.org/stable/c/25feffb3fbd51ae81d92c65cebc0e932663828b3
• https://git.kernel.org/stable/c/47cd3770e31df942e2bb925a9a855c79ed0662eb
• https://git.kernel.org/stable/c/47f3be62eab50b8cd7e1ae5fc2c4dae687497c34
• https://git.kernel.org/stable/c/4ed21975311247bb84e82298eeb359ec0a0fa84d
• https://git.kernel.org/stable/c/5925e224cc6edfef57b20447f18323208461309b
• https://git.kernel.org/stable/c/6d65079c69dc1feb817ed71f5bd15e83a7d6832d
• https://git.kernel.org/stable/c/b018c0440b871d8b001c996e95fa4538bd292de6
• https://git.kernel.org/stable/c/cfa6a1a79ed6d336fac7a5d87eb5471e4401829f
• https://git.kernel.org/stable/c/f61fc650c47849637fa1771a31a11674c824138a