Bug 2425046 (CVE-2025-68741)

Summary: CVE-2025-68741 kernel: scsi: qla2xxx: Fix improper freeing of purex item
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 2025-12-24 13:04:27 UTC 
In the Linux kernel, the following vulnerability has been resolved:

scsi: qla2xxx: Fix improper freeing of purex item

In qla2xxx_process_purls_iocb(), an item is allocated via
qla27xx_copy_multiple_pkt(), which internally calls
qla24xx_alloc_purex_item().

The qla24xx_alloc_purex_item() function may return a pre-allocated item
from a per-adapter pool for small allocations, instead of dynamically
allocating memory with kzalloc().

An error handling path in qla2xxx_process_purls_iocb() incorrectly uses
kfree() to release the item. If the item was from the pre-allocated
pool, calling kfree() on it is a bug that can lead to memory corruption.

Fix this by using the correct deallocation function,
qla24xx_free_purex_item(), which properly handles both dynamically
allocated and pre-allocated items.
Comment 1 Alexander B 2025-12-25 06:30:46 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025122415-CVE-2025-68741-894a@gregkh/T