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HIGH

CVE-2026-45531

CVSS v3

7.8

HIGH

EPSS Score

0.1 %

exploit probability, as of 2026-09-29

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

In read_boot_region of fsck.c, there is a possible out of bounds read due to a heap buffer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Technical details

Published
2026-09-08
Last Modified
2026-09-10

Frequently asked questions

What is CVE-2026-45531?

In read_boot_region of fsck.c, there is a possible out of bounds read due to a heap buffer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Is CVE-2026-45531 actively exploited?

Active exploitation of CVE-2026-45531 has not been confirmed. Its EPSS score was 0.1% on 2026-09-29, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-45531?

CVE-2026-45531 has a CVSS v3 base score of 7.8 (HIGH severity).

Is CVE-2026-45531 affecting your environment?

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