PT-2026-61271 · Linux+1 · Linux Kernel+1

CVE-2026-63954

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Published

2026-07-19

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Updated

2026-09-07

CVSS v3.1

7.8

High

VectorAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)
Description A crash occurs in the hpfs module when the hpfs map dnode bitmap() function fails. In this scenario, the system attempts to call hpfs brelse4() using an uninitialized quad buffer head, leading to a system crash.
Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

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Related Identifiers

AZL-92757
CVE-2026-63954
USN-8593-1
USN-8603-1
USN-8618-1
USN-8663-1
USN-8664-1
USN-8728-1

Affected Products

Linux Kernel
Ubuntu