ReviewHigh

CVE-2022-1011

kernel, linux kernel, fedora

A use-after-free flaw was found in the Linux kernel’s FUSE filesystem in the way a user triggers write(). This flaw allows a local user to gain unauthorized access to data from the FUSE filesystem, resulting in privilege escalation.

CVSS
7.8
EPSS
1.17%
65.2% percentile
CISA KEV
Not listed
Published
2022.03.19
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability1.17%
Technical severityCVSS 7.8

Vulnerability overview

A use-after-free flaw was found in the Linux kernel’s FUSE filesystem in the way a user triggers write(). This flaw allows a local user to gain unauthorized access to data from the FUSE filesystem, resulting in privilege escalation.

Affected product and versions

Product
kernel, linux kernel, fedora
Affected versions
>= Linux kernel 5.16-rc8, >= 2.6.35 < 4.9.320, >= 4.10 < 4.14.276, >= 4.15 < 4.19.238, >= 4.20 < 5.4.185, >= 5.5 < 5.10.106, >= 5.11 < 5.15.29, >= 5.16 < 5.16.15, 5.17, 34, 35, 2.0, 1.0, 6.0, 7.0, 8.0, 8.6, 8, 4.0, 9.0
Fixed versions
4.9.320, 4.14.276, 4.19.238, 5.4.185, 5.10.106, 5.15.29, 5.16.15

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that kernel, linux kernel, fedora and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416