5.5

CVE-2024-35846: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2024-35846DEBIAN-CVE-2024-35846
Published 17-05-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2024-35846 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.19%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 5
USN-6949-1USN-6949-2USN-6952-1USN-6952-2USN-6955-1

Timeline

  1. 17-05-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: mm: zswap: fix shrinker NULL crash with cgroup_disable=memory Christian reports a NULL deref in zswap that he bisected down to the zswap shrinker. 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, the zswap shrinker might get called with sc->memcg == NULL. This is okay in many places, like the lruvec operations. But it crashes in memcg_page_state() - which is only used due to the non-node accounting of cgroup's the zswap memory to begin with. Nhat spotted that the memcg can be NULL in the memcg-disabled case, and I was 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

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

0.00 pp

From 0.19% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu82 products
  • linux< 6.8.0-40.40
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1013.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ b5ba474f3f518701249598b35c581b92a3c95b48, < b0fdabc908a7f81d12382c87ca9e46a9c2e14042 | ≥ b5ba474f3f518701249598b35c581b92a3c95b48, < 682886ec69d22363819a83ddddd5d66cb5c791e1 | 6.8
  • linux_kernel≥ 6.8, < 6.8.9 | 6.9:rc1 | 6.9:rc2 | 6.9:rc3 | 6.9:rc4 | 6.9:rc5
Debian1 product
  • linux< 6.8.9-1

3 vendors · 85 products

References

11 links
Show all 11 references