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Review reviewHigh

CVE-2022-50861

Linux

In the Linux kernel, the following vulnerability has been resolved: NFSD: Finish converting the NFSv2 GETACL result encoder The xdr_stream conversion inadvertently left some code that set the page_len of the send buffer. The XDR stream encoders should handle this automatically now. This oversight adds garbage past the end of the Reply message. Clients typically ignore the garbage, but NFSD does not need to send it, as it leaks stale memory contents onto the wire.

CVSS
7.5
EPSS
0.51%
40.5% percentile
CISA KEV
Not listed
Published
2025.12.30
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.51%
Technical severityCVSS 7.5

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: NFSD: Finish converting the NFSv2 GETACL result encoder The xdr_stream conversion inadvertently left some code that set the page_len of the send buffer. The XDR stream encoders should handle this automatically now. This oversight adds garbage past the end of the Reply message. Clients typically ignore the garbage, but NFSD does not need to send it, as it leaks stale memory contents onto the wire.

Affected product and versions

Product
Linux
Affected versions
>= 6677b0d16abe77702040768c96e2ea17cd5b3f6e < a20b0abab966a189a79aba6ebf41f59024a3224d, >= f8cba47344f794b54373189bec23195b51020faf < 5030d4d2bf8b6f6f3d16401ab92a88bc5aa2377a, >= f8cba47344f794b54373189bec23195b51020faf < d5b867fd2d7f79630b1a2906a7bb4f4b75bf297a, >= f8cba47344f794b54373189bec23195b51020faf < 2b825efb0577a32a872e872a869e0947cf9dd6d3, >= f8cba47344f794b54373189bec23195b51020faf < ea5021e911d3479346a75ac9b7d9dcd751b0fb99, >= 5.13
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux 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:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
Not available
CVE-2022-50861 — Linux | SECUFOCUS NOW