ReviewHigh

CVE-2022-32981

linux kernel

An issue was discovered in the Linux kernel through 5.18.3 on powerpc 32-bit platforms. There is a buffer overflow in ptrace PEEKUSER and POKEUSER (aka PEEKUSR and POKEUSR) when accessing floating point registers.

CVSS
7.8
EPSS
0.96%
59.2% percentile
CISA KEV
Not listed
Published
2022.06.11
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.96%
Technical severityCVSS 7.8

Vulnerability overview

An issue was discovered in the Linux kernel through 5.18.3 on powerpc 32-bit platforms. There is a buffer overflow in ptrace PEEKUSER and POKEUSER (aka PEEKUSR and POKEUSR) when accessing floating point registers.

Affected product and versions

Product
linux kernel
Affected versions
>= 3.13 < 4.9.318, >= 4.10 < 4.14.283, >= 4.15 < 4.19.247, >= 4.20 < 5.4.198, >= 5.5 < 5.10.122, >= 5.11 < 5.15.47, >= 5.16.0 < 5.17.15, >= 5.18 < 5.18.4, 5.19
Fixed versions
4.9.318, 4.14.283, 4.19.247, 5.4.198, 5.10.122, 5.15.47, 5.17.15, 5.18.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that linux kernel 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-120