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CVE-2019-18885

MediumPublished

fs/btrfs/volumes.c in the Linux kernel before 5.1 allows a btrfs_verify_dev_extents NULL pointer dereference via a crafted btrfs image because...

Published: Nov 14, 2019
Updated: Aug 5, 2024
Assigning CNA: mitre
Evidence observed: Aug 8, 2026

Primary CVSS

5.5/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS probability estimate

1.2%

Low · next 30 days

Percentile: 66.8%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

fs/btrfs/volumes.c in the Linux kernel before 5.1 allows a btrfs_verify_dev_extents NULL pointer dereference via a crafted btrfs image because fs_devices->devices is mishandled within find_device, aka CID-09ba3bc9dd15.

Sources

CVE-2019-18885PoC
Proof-of-concept for a null pointer dereference in the Linux kernel BTRFS filesystem (CVE-2019-18885), including a crafted image, reproduction steps, and KASAN logs.

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