Vulnerability in Linux Linux_kernel

CVE-2021-41073

loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation.

EPSS: 0.017 (75.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-41073?
CVE-2021-41073 is a high-severity vulnerability in Linux Linux_kernel, classified under Release of Invalid Pointer or Reference. CVSS score: 7.8/10. Published 2021-09-19.
How severe is CVE-2021-41073?
High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2021-41073 known to be exploited?
38 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.