### [CVE-2024-26630](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26630)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=cf264e1329fb%3C%20ba60fdf75e89%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

In the Linux kernel, the following vulnerability has been resolved:mm: cachestat: fix folio read-after-free in cache walkIn cachestat, we access the folio from the page cache's xarray to computeits page offset, and check for its dirty and writeback flags.  However, wedo not hold a reference to the folio before performing these actions,which means the folio can concurrently be released and reused as anotherfolio/page/slab.Get around this altogether by just using xarray's existing machinery forthe folio page offsets and dirty/writeback states.This changes behavior for tmpfs files to now always report zeroes in theirdirty and writeback counters.  This is okay as tmpfs doesn't followconventional writeback cache behavior: its pages get "cleaned" duringswapout, after which they're no longer resident etc.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds