CVE-2026-49428
HighCVSS 8.4Exploitation Probability (EPSS)
Low risk27th percentile - higher than 27% of all known CVEs
Summary
Certain system calls, such as open(2) with the O_TRUNC flag set, and fspacectl(2), could incorrectly free memory in largepage objects. These operations are not permitted on largepage objects, but the implementation did not verify this. An unprivileged local user can abuse the bug to access freed kernel memory, which can be exploited to escalate privileges.
Risk Assessment
Access to freed kernel memory may allow an unprivileged user to escalate privileges and gain control of the system.
Recommendation
Apply the vendor patch that adds verification of permitted operations on largepage objects. Update the system to a patched version.
Original NVD description (English source)
Certain system calls, such open(2) with the O_TRUNC flag set, and fspacectl(2), could incorrectly free memory in largepage objects. These operations are not permitted on largepage objects, but the implementation did not verify this. An unprivileged local user can abuse the bug to access freed kernel memory. This can be exploited to escalate privileges.