CVE-2024-26935

/// Technical description

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

scsi: core: Fix unremoved procfs host directory regression

Commit fc663711b944 ("scsi: core: Remove the /proc/scsi/${proc_name}

directory earlier") fixed a bug related to modules loading/unloading, by

adding a call to scsi_proc_hostdir_rm() on scsi_remove_host(). But that led

to a potential duplicate call to the hostdir_rm() routine, since it's also

called from scsi_host_dev_release(). That triggered a regression report,

which was then fixed by commit be03df3d4bfe ("scsi: core: Fix a procfs host

directory removal regression"). The fix just dropped the hostdir_rm() call

from dev_release().

But it happens that this proc directory is created on scsi_host_alloc(),

and that function "pairs" with scsi_host_dev_release(), while

scsi_remove_host() pairs with scsi_add_host(). In other words, it seems the

reason for removing the proc directory on dev_release() was meant to cover

cases in which a SCSI host structure was alloca

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References