cve/2024/CVE-2024-35846.md

### [CVE-2024-35846](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-35846)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=b5ba474f3f51%3C%20b0fdabc908a7%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: zswap: fix shrinker NULL crash with cgroup_disable=memoryChristian reports a NULL deref in zswap that he bisected down to the zswapshrinker.  The issue also cropped up in the bug trackers of libguestfs [1]and the Red Hat bugzilla [2].The problem is that when memcg is disabled with the boot time flag, thezswap shrinker might get called with sc->memcg == NULL.  This is okay inmany places, like the lruvec operations.  But it crashes inmemcg_page_state() - which is only used due to the non-node accounting ofcgroup's the zswap memory to begin with.Nhat spotted that the memcg can be NULL in the memcg-disabled case, and Iwas then able to reproduce the crash locally as well.[1] https://github.com/libguestfs/libguestfs/issues/139[2] https://bugzilla.redhat.com/show_bug.cgi?id=2275252

### POC

#### Reference
No PoCs from references.

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