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Review reviewHigh

CVE-2025-68246

Linux

In the Linux kernel, the following vulnerability has been resolved: ksmbd: close accepted socket when per-IP limit rejects connection When the per-IP connection limit is exceeded in ksmbd_kthread_fn(), the code sets ret = -EAGAIN and continues the accept loop without closing the just-accepted socket. That leaks one socket per rejected attempt from a single IP and enables a trivial remote DoS. Release client_sk before continuing. This bug was found with ZeroPath.

CVSS
7.5
EPSS
0.36%
28.7% percentile
CISA KEV
Not listed
Published
2025.12.17
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.36%
Technical severityCVSS 7.5

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: ksmbd: close accepted socket when per-IP limit rejects connection When the per-IP connection limit is exceeded in ksmbd_kthread_fn(), the code sets ret = -EAGAIN and continues the accept loop without closing the just-accepted socket. That leaks one socket per rejected attempt from a single IP and enables a trivial remote DoS. Release client_sk before continuing. This bug was found with ZeroPath.

Affected product and versions

Product
Linux
Affected versions
>= 0626e6641f6b467447c81dd7678a69c66f7746cf < 7a3c7154d5fc05956a8ad9e72ecf49e21555bfca, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 5746b2a0f5eb3d79667b3c51fe849bd62464220e, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 4587a7826be1ae0190dba10ff70b46bb0e3bc7d3, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 35521b5a7e8a184548125f4530552101236dcda1, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 98a5fd31cbf72d46bf18e50b3ab0ce86d5f319a9, >= 5.15
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:N/I:N/A:H
CWE
Not available