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Review reviewCritical

CVE-2024-53095

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix use-after-free of network namespace. Recently, we got a customer report that CIFS triggers oops while reconnecting to a server. [0] The workload runs on Kubernetes, and some pods mount CIFS servers in non-root network namespaces. The problem rarely happened, but it was always while the pod was dying. The root cause is wrong reference counting for network namespace. CIFS uses kernel sockets, which do not hold refcnt of the netns that the socket belongs to. That means CIFS must ensure the socket is always fre...

CVSS
9.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2024.11.22
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 9.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix use-after-free of network namespace. Recently, we got a customer report that CIFS triggers oops while reconnecting to a server. [0] The workload runs on Kubernetes, and some pods mount CIFS servers in non-root network namespaces. The problem rarely happened, but it was always while the pod was dying. The root cause is wrong reference counting for network namespace. CIFS uses kernel sockets, which do not hold refcnt of the netns that the socket belongs to. That means CIFS must ensure the socket is always fre...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 26abe14379f8e2fa3fd1bcf97c9a7ad9364886fe < e8c71494181153a134c96da28766a57bd1eac8cb, >= 26abe14379f8e2fa3fd1bcf97c9a7ad9364886fe < c7f9282fc27fc36dbaffc8527c723de264a132f8, >= 26abe14379f8e2fa3fd1bcf97c9a7ad9364886fe < ef7134c7fc48e1441b398e55a862232868a6f0a7, >= 4.2, >= 4.2 < 6.6.62, >= 6.7 < 6.11.9, 6.12
Fixed versions
6.6.62, 6.11.9

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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416
CVE-2024-53095 — Linux Linux, linux kernel | SECUFOCUS NOW