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Review reviewHigh

CVE-2021-47347

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: wl1251: Fix possible buffer overflow in wl1251_cmd_scan Function wl1251_cmd_scan calls memcpy without checking the length. Harden by checking the length is within the maximum allowed size.

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2024.05.22
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: wl1251: Fix possible buffer overflow in wl1251_cmd_scan Function wl1251_cmd_scan calls memcpy without checking the length. Harden by checking the length is within the maximum allowed size.

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 < 57ad99ae3c6738ba87bad259bb57c641ca68ebf6, >= 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 < d3d8b9c9c7843dce31e284927d4c9904fd5a510a, >= 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 < 0f6c0488368c9ac1aa685821916fadba32f5d1ef, >= 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 < 115103f6e3f1c26c473766c16439c7c8b235529a, >= 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 < d71dddeb5380613f9ef199f3e7368fd78fb1a46e, >= 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 < c5e4a10d7bd5d4f419d8b9705dff60cf69b302a1, >= 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 < 302e2ee34c5f7c5d805b7f835d9a6f2b43474e2a, >= 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 < 40af3960a15339e8bbd3be50c3bc7b35e1a0b6ea, >= 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 < d10a87a3535cce2b890897914f5d0d83df669c63, >= 2.6.31, < 4.4.276, >= 4.5 < 4.9.276, >= 4.10 < 4.14.240, >= 4.15 < 4.19.198, >= 4.20 < 5.4.133, >= 5.5 < 5.10.51, >= 5.11 < 5.12.18, >= 5.13 < 5.13.3
Fixed versions
4.4.276, 4.9.276, 4.14.240, 4.19.198, 5.4.133, 5.10.51, 5.12.18, 5.13.3

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-120