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Review reviewHigh

CVE-2025-68806

Linux

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix buffer validation by including null terminator size in EA length The smb2_set_ea function, which handles Extended Attributes (EA), was performing buffer validation checks that incorrectly omitted the size of the null terminating character (+1 byte) for EA Name. This patch fixes the issue by explicitly adding '+ 1' to EaNameLength where the null terminator is expected to be present in the buffer, ensuring the validation accurately reflects the total required buffer size.

CVSS
7.5
EPSS
0.37%
30.1% percentile
CISA KEV
Not listed
Published
2026.01.14
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.37%
Technical severityCVSS 7.5

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix buffer validation by including null terminator size in EA length The smb2_set_ea function, which handles Extended Attributes (EA), was performing buffer validation checks that incorrectly omitted the size of the null terminating character (+1 byte) for EA Name. This patch fixes the issue by explicitly adding '+ 1' to EaNameLength where the null terminator is expected to be present in the buffer, ensuring the validation accurately reflects the total required buffer size.

Affected product and versions

Product
Linux
Affected versions
>= d070c4dd2a5bed4e9832eec5b6c029c7d14892ea < cae52c592a07e1d3fa3338a5f064a374a5f26750, >= 0ba5439d9afa2722e7728df56f272c89987540a4 < a28a375a5439eb474e9f284509a407efb479c925, >= 0ba5439d9afa2722e7728df56f272c89987540a4 < d26af6d14da43ab92d07bc60437c62901dc522e6, >= 0ba5439d9afa2722e7728df56f272c89987540a4 < 6dc8cf6e7998ef7aeb9383a4c2904ea5d22fa2e4, >= 0ba5439d9afa2722e7728df56f272c89987540a4 < 95d7a890e4b03e198836d49d699408fd1867cb55, >= bb5bf157b5be1643cccc7cbbe57fcdef9ae52c2c, >= 1a13ecb96230e8b7b91967e292836f7b01ec8111, >= 404e7c01e16288b5e0171d1d8fd3328e806d0794, >= 6.1.52 < 6.1.160, >= 5.15.131 < 5.16, >= 6.4.15 < 6.5, >= 6.5.2 < 6.6, >= 6.6
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