Security readout for executives and security teams
Plain-English summary
A flaw in the Linux kernel’s SCSI target handling can crash the kernel when a persistent-reservation request reaches a specific error path. The documented impact is loss of availability, not data theft or modification. Systems acting as network-accessible SCSI targets warrant the greatest attention.
Executive priority
Treat this as a prompt availability remediation for exposed storage infrastructure, especially where an outage would disrupt critical workloads. Patch during the earliest safe maintenance window. Systems not providing Linux SCSI target services are lower priority after configuration verification.
Technical view
core_scsi3_decode_spec_i_port() may leave dest_se_deve unset after failing to locate dest_tpg, then pass that NULL pointer to core_scsi3_lunacl_undepend_item(). The resulting kernel paging fault can cause denial of service. The fix checks the pointer before calling the cleanup function. CVSS 3.1 is 7.5: network-accessible, low complexity, and availability-only impact.
Likely exposure
Exposure centers on Linux systems using the kernel SCSI target subsystem and processing SPC-3 persistent-reservation SPEC_I_PT requests. The bundle identifies multiple kernel versions from 5.9 through 6.16, but its version entries do not clearly distinguish vulnerable and corrected package boundaries. Confirm exact exposure through kernel or distribution guidance.
Exploitation context
The supplied record does not establish public proof-of-concept availability or active exploitation, and the CVE is not listed as KEV. The CVSS vector describes unauthenticated network reachability, but practical reachability depends on an accessible, configured Linux SCSI target path.
Researcher notes
The failure occurs during cleanup after destination resolution fails, making the NULL dereference the documented root cause. The source bundle supports denial of service only. Exact triggering prerequisites, distribution-specific affected ranges, exploit reliability, and broader consequences are not established and should not be inferred.
Mitigation direction
- Update to a vendor-supported kernel containing the referenced NULL-check fix.
- Prioritize network-accessible systems providing Linux SCSI target services.
- If immediate patching is impossible, consult distribution guidance for supported temporary risk-reduction measures.
Validation and detection
- Inventory deployed kernel versions and identify systems using the Linux SCSI target subsystem.
- Compare each distribution package against its security advisory and the referenced stable fix commits.
- Review kernel logs for dest_tpg lookup failures, paging requests, or target_core_mod crashes.
- After updating, confirm the corrected kernel is active and test legitimate persistent-reservation operations.
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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CVE-2025-38399 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
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.
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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6LinuxVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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/70ddb8133fdb512d4b1f2b4fd1c9e518514f182cCVE reference, Linux
- https://git.kernel.org/stable/c/1129e0e0a833acf90429e0f13951068d5f026e4fCVE reference, Linux
- https://git.kernel.org/stable/c/1627dda4d70ceb1ba62af2e401af73c09abb1eb5CVE reference, Linux
- https://git.kernel.org/stable/c/55dfffc5e94730370b08de02c0cf3b7c951bbe9eCVE reference, Linux
- https://git.kernel.org/stable/c/7296c938df2445f342be456a6ff0b3931d97f4e5CVE reference, Linux
- https://git.kernel.org/stable/c/c412185d557578d3f936537ed639c4ffaaed4075CVE reference, Linux
- https://git.kernel.org/stable/c/d8ab68bdb294b09a761e967dad374f2965e1913fCVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlCVE reference, CVE
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlCVE reference, CVE
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.