Bug 2400754 (CVE-2023-53456)

Summary: CVE-2023-53456 kernel: scsi: qla4xxx: Add length check when parsing nlattrs
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-10-01 12:05:37 UTC 
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.
Comment 1 Jon Moroney 2025-10-01 20:53:26 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100105-CVE-2023-53456-b77a@gregkh/T