Executive Summary

This vulnerability exists in the Linux kernel's qla4xxx driver where it parses netlink attributes (nlattrs) without checking their length. Specifically, three functions (qla4xxx_set_chap_entry, qla4xxx_iface_set_param, and qla4xxx_sysfs_ddb_set_param) convert nlattrs directly to pointers without validating their size. If a malformed nlattr with an invalid length (e.g., length 0) is processed, it can cause an out-of-bounds (OOB) read, potentially leaking heap memory data. The fix involves adding length checks before accessing nlattr data and returning an error if the check fails.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can lead to an out-of-bounds read in the Linux kernel's qla4xxx driver, which may cause leakage of heap memory data. Such data leakage could expose sensitive information from kernel memory, potentially compromising system security and privacy.

Useful 0 Not Useful 0

Mitigation Strategies

The immediate step to mitigate this vulnerability is to update the Linux kernel to a version where the qla4xxx driver includes the length check for nlattrs parsing. This fix adds nla_len checks before accessing nlattr data and returns an error if the length check fails, preventing out-of-bounds reads.

Useful 0 Not Useful 0