CVE-2023-53456: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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 products

• Linux Linux Kernel: from 3.2, before 4.14.326 (fixed in 4.14.326); from 4.15, before 4.19.295 (fixed in 4.19.295); from 4.20, before 5.4.257 (fixed in 5.4.257); from 5.5, before 5.10.195 (fixed in 5.10.195); from 5.11, before 5.15.132 (fixed in 5.15.132); from 5.16, before 6.1.53 (fixed in 6.1.53); …

Published 2025-10-01. Last modified 2026-06-17.