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Review reviewHigh

CVE-2022-49956

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8712: fix use after free bugs _Read/Write_MACREG callbacks are NULL so the read/write_macreg_hdl() functions don't do anything except free the "pcmd" pointer. It results in a use after free. Delete them.

CVSS
7.8
EPSS
0.20%
10.5% percentile
CISA KEV
Not listed
Published
2025.06.18
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.20%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8712: fix use after free bugs _Read/Write_MACREG callbacks are NULL so the read/write_macreg_hdl() functions don't do anything except free the "pcmd" pointer. It results in a use after free. Delete them.

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef < 7dce6b0ee7d78667d6c831ced957a08769973063, >= 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef < 376e15487fec837301d888068a3fcc82efb6171a, >= 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef < 9fd6170c5e2d0ccd027abe26f6f5ffc528e1bb27, >= 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef < d0aac7146e96bf39e79c65087d21dfa02ef8db38, >= 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef < 19e3f69d19801940abc2ac37c169882769ed9770, >= 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef < dc02aaf950015850e7589696521c7fca767cea77, >= 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef < b1727def850904e4b8ba384043775672841663a1, >= 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef < e230a4455ac3e9b112f0367d1b8e255e141afae0, >= 2.6.37, >= 2.6.37 < 4.9.328, >= 4.10 < 4.14.293, >= 4.15 < 4.19.258, >= 4.20 < 5.4.213, >= 5.5 < 5.10.142, >= 5.11 < 5.15.66, >= 5.16 < 5.19.8, 6.0
Fixed versions
4.9.328, 4.14.293, 4.19.258, 5.4.213, 5.10.142, 5.15.66, 5.19.8

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-416