Privilege Escalation Affecting torvalds/linux package, versions [5.10,5.14.7)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
0.9% (75th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3006291
  • published26 Jan 2022
  • disclosed19 Sept 2021
  • creditUnknown

Introduced: 19 Sep 2021

CVE-2021-41073  (opens in a new tab)
CWE-269  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 5.14.7 or higher.

Overview

Affected versions of this package are vulnerable to Privilege Escalation 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//maps for exploitation.

References

CVSS Base Scores

version 3.1