CVE-2026-25828
CVE-2026-25828 is a medium-severity vulnerability with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.
Key facts
- Severity: Medium (CVSS 3.x base score 5.4)
- EPSS exploit prediction: 1% (65th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-7371
- Weakness: CWE-78
- Published:
- Last modified:
Description
grub-btrfs through 2026-01-31 (on Arch Linux and derivative distributions) allows initramfs OS command injection because it does not sanitize the $root parameter to resolve_device(). NOTE: a third party reports "exploitation may not be feasible under normal conditions and may depend on specific implementation details within resolve_device."
Frequently asked questions
- What is CVE-2026-25828?
- grub-btrfs through 2026-01-31 (on Arch Linux and derivative distributions) allows initramfs OS command injection because it does not sanitize the $root parameter to resolve_device(). NOTE: a third party reports "exploitation may not be feasible under normal conditions and may depend on specific implementation details within resolve_device."
- How severe is CVE-2026-25828?
- CVE-2026-25828 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2026-25828 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-25828?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-25828 have an EU (EUVD) identifier?
- Yes. CVE-2026-25828 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7371.
- When was CVE-2026-25828 published?
- CVE-2026-25828 was published on 2026-02-12 and last updated on 2026-06-17.
References
- https://archlinux.org/packages/extra/any/grub-btrfs/
- https://github.com/Antynea/grub-btrfs/tree/master
- https://github.com/cardosource/CVE-2026-25828
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