A use-after-free flaw was found in the add_partition in block/partitions/core.c in the Linux kernel. A local attacker with user privileges could cause a denial of service on the system. The issue results from the lack of code cleanup when device_add call fails when adding a partition to the disk.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-4150
• https://bugzilla.redhat.com/show_bug.cgi?id=2025938
• https://lkml.org/lkml/2021/10/18/485
• https://lkml.org/lkml/2021/9/6/781