CVE-2023-53414: scsi: snic: Fix memory leak with using debugfs_lookup()
In the Linux kernel, the following vulnerability has been resolved:
scsi: snic: Fix memory leak with using debugfs_lookup()
When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time. To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic at
once.
Security readout for executives and security teams
Plain-English summary
This Linux kernel issue is a memory leak in the snic SCSI driver’s debugfs cleanup path. A local user could potentially consume kernel memory over time and affect availability. The CVE does not indicate data theft or tampering impact.
Executive priority
Treat as a moderate availability risk. It is unlikely to be remotely exploitable from the provided evidence, but should be remediated through normal kernel patch cycles, faster on shared or high-availability Linux systems.
Technical view
The flaw is CWE-401: debugfs_lookup() returns a dentry reference that required dput(), but the snic code failed to release it. Kernel fixes replace the pattern with debugfs_lookup_and_remove(). CVSS is 5.5: local access, low complexity, low privileges, no user interaction, availability impact only.
Likely exposure
Exposure is most likely on Linux systems running affected kernel builds where the snic SCSI driver code is present or loaded. Internet exposure is not indicated; the CVSS vector is local-only.
Exploitation context
The source bundle does not show CISA KEV listing or any cited active exploitation. Practical risk is denial of service through memory exhaustion, requiring local low-privileged access.
Researcher notes
Evidence supports a local kernel memory leak in snic debugfs handling. The affected version data in the bundle is limited and somewhat coarse, so distribution-specific package advisories are important for exact exposure and fixed build identification.
Mitigation direction
Update affected Linux kernels using vendor or distribution guidance.
Confirm the running kernel includes the referenced stable commits or equivalent backports.
Prioritize multi-user systems where local users or workloads are less trusted.
If patching is delayed, check vendor guidance for driver-specific risk reduction.
Validation and detection
Inventory Linux kernel versions across affected fleets.
Check whether snic driver code is built, packaged, or loaded on those systems.
Compare installed kernel changelogs against the referenced stable commits.
Review vendor advisories for backported fixes matching CVE-2023-53414.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
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 · low confidence lookup
CWE-401: Exact CWE lookup
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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.
We 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.
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
CWE-401 · source CWE mapping
Missing Release of Memory after Effective Lifetime
Missing Release of Memory after Effective Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.