cvedb.io
CVE-2021-3492
HIGH · CVSS 8.8
EPSS exploitation probability: 0%
Published 2021-04-17T05:15:13.113 · Last modified 2026-06-17T04:05:12.033

Summary

Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring during copy_from_user() correctly. These could lead to either a double-free situation or memory not being freed at all. An attacker could use this to cause a denial of service (kernel memory exhaustion) or gain privileges via executing arbitrary code. AKA ZDI-CAN-13562.

Affected products

canonical — ubuntu_linux

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.