Review reviewHigh

CVE-2021-47148

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: fix a buffer overflow in otx2_set_rxfh_context() This function is called from ethtool_set_rxfh() and "*rss_context" comes from the user. Add some bounds checking to prevent memory corruption.

CVSS
7.8
EPSS
0.23%
14.3% percentile
CISA KEV
Not listed
Published
2024.03.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.23%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: fix a buffer overflow in otx2_set_rxfh_context() This function is called from ethtool_set_rxfh() and "*rss_context" comes from the user. Add some bounds checking to prevent memory corruption.

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 81a4362016e7d8b17031fe1aa43cdb58a7f0f163 < 389146bc6d2bbb20714d06624b74856320ce40f7, >= 81a4362016e7d8b17031fe1aa43cdb58a7f0f163 < e5cc361e21648b75f935f9571d4003aaee480214, >= 5.12, >= 5.12 < 5.12.9, 5.13
Fixed versions
5.12.9

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, 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-787