What’s Vulnerable › Vulnerabilities

CVE-2020-25284

• Severity: medium (CVSS 4.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-09-13 · updated 2026-06-17
• Weakness: CWE-863

Description

The rbd block device driver in drivers/block/rbd.c in the Linux kernel through 5.8.9 used incomplete permission checking for access to rbd devices, which could be leveraged by local attackers to map or unmap rbd block devices, aka CID-f44d04e696fe.

Affected products

• Debian Linux: 9.0
• Linux kernel: before 5.8.9 — fixed in 5.8.9
• openSUSE Leap: 15.1

How to fix

Upgrade to a fixed version: Linux kernel 5.8.9. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f44d04e696feaf13d192d942c4f14ad2e117065a
• https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
• https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
• https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
• https://twitter.com/grsecurity/status/1304537507560919041
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f44d04e696feaf13d192d942c4f14ad2e117065a
• https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
• https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html

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