Security readout for executives and security teams
Plain-English summary
A Linux SMB/CIFS client bug can cause kernel memory corruption when CIFS mounts run inside non-root network namespaces, such as Kubernetes pods, and the namespace is destroyed during reconnect or unmount. The source describes rare crashes during pod termination, not internet-wide remote compromise.
Executive priority
Prioritize patching container platforms and Linux hosts that combine CIFS mounts with Kubernetes or network namespaces. Business urgency is highest where kernel crashes could disrupt production workloads or shared storage access.
Technical view
CVE-2024-53095 is a Linux kernel CIFS client use-after-free involving incorrect network namespace reference counting. Kernel sockets do not hold the namespace reference, so CIFS could access a freed netns during asynchronous TCP reconnect handling. The fix holds the netns reference per socket and moves release timing.
Likely exposure
Most relevant to Linux systems using CIFS/SMB client mounts inside non-root network namespaces, especially Kubernetes workloads. Exposure depends on kernel version, distro backports, CIFS use, and namespace lifecycle behavior.
Exploitation context
The bundle shows KEV is false and provides no evidence of active exploitation. The described trigger is local and lifecycle-dependent: CIFS reconnect behavior during namespace destruction and unmount. CVSS rates it AV:L, PR:L, UI:N.
Researcher notes
Version evidence in the bundle is limited and partly represented as broad kernel markers and commit identifiers. Validate exact affected ranges through upstream stable commits and distribution advisories before scoping remediation.
Mitigation direction
- Apply kernel or distribution updates containing the referenced stable CIFS fixes.
- Check vendor advisories for affected kernel builds and backported patch status.
- Reduce CIFS mounts inside short-lived non-root network namespaces where feasible.
- Ensure workloads cleanly unmount CIFS before namespace or pod teardown.
- Monitor vendor guidance for additional mitigations or regressions.
Validation and detection
- Inventory Linux hosts running CIFS/SMB client mounts.
- Identify Kubernetes pods or containers using CIFS in non-root network namespaces.
- Map running kernels to vendor advisories and stable fix commits.
- Review kernel logs for CIFS reconnect messages, oops, or crashes during pod termination.
- Confirm updated kernels include the referenced stable commits or distro backports.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-416: Exact CWE lookup
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Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2024-53095 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/e8c71494181153a134c96da28766a57bd1eac8cbCVE reference, Linux
- https://git.kernel.org/stable/c/c7f9282fc27fc36dbaffc8527c723de264a132f8CVE reference, Linux
- https://git.kernel.org/stable/c/ef7134c7fc48e1441b398e55a862232868a6f0a7CVE reference, Linux
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.