CVE-2026-98118

/// Technical description

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

netfs: Fix readahead synchronisation issues by loading all folios upfront

There are some synchronisation issues that derive from the app thread

adding more folios to the rolling buffer whilst the collector thread is

looking at them or trying to clear them, such as determining the setting of

front_folio_order when the next folio hasn't been added yet,

The reason for the rolling buffer approach is that loading the buffer

upfront and then dropping all the refs just acquired is quite a slow

operation, and loading progressively allows some of the cost to be deferred

until after at least some of the I/O is started.

Instead, a better way is to load all the folios into the rolling buffer

upfront - and then drop the refs later, once the I/O is in progress. (Even

better would be for the refs not to be there at all.)

Fix this by changing the rolling buffer loader to load all the folios

selected by the VM for readahead upfro

/// Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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.

/// Affected products

/// References