Security readout for executives and security teams
Plain-English summary
A Linux kernel flaw on LoongArch systems can crash or severely stall the operating system when a BPF tracing trampoline receives an unsupported structure argument. The reported failure includes a kernel paging error, RCU stalls, and possible out-of-memory behavior. This can disrupt affected servers, but the supplied evidence does not demonstrate real-world data theft or modification.
Executive priority
Prioritize LoongArch systems where local users, development workloads, observability agents, or administrators can use BPF tracing. Schedule prompt kernel remediation because successful triggering can destabilize the host. Other CPU architectures are not identified as affected in the supplied evidence.
Technical view
The LoongArch BPF trampoline implementation did not support structure arguments but failed to reject them safely. Exercising this path caused an invalid memory access, followed by RCU starvation and potential OOM conditions. The supplied record assigns CVSS 3.1 score 7.8 with local, low-complexity, low-privilege access. The referenced resolution rejects unsupported structure arguments.
Likely exposure
Exposure is limited to LoongArch systems running an affected Linux kernel and allowing a local user to exercise relevant BPF tracing trampoline functionality. The bundle identifies Linux 6.17-related versions as affected, but its version data is ambiguous. Confirm exact affected and fixed releases through the kernel vendor and referenced commits.
Exploitation context
CISA KEV status is false, and the supplied sources provide no evidence of active exploitation or a public weaponized exploit. The documented trigger occurred during the Linux BPF selftest. The demonstrated impact is kernel instability and denial of service; practical confidentiality or integrity impact is not established by the bundle.
Researcher notes
The root issue is unsupported structure-argument handling in LoongArch BPF trampolines. The record shows a reproducible kernel oops from the tracing_struct selftest and secondary RCU starvation. Researchers should distinguish the demonstrated availability failure from the CVSS vector's broader confidentiality and integrity ratings; the supplied evidence does not establish those outcomes.
Mitigation direction
- Update to a vendor-supported kernel release containing the applicable referenced stable fix.
- Confirm the selected kernel package rejects unsupported LoongArch BPF trampoline structure arguments.
- Restrict BPF tracing access to trusted administrators until affected systems are updated.
- Follow distribution or Linux stable guidance for exact fixed versions and reboot requirements.
Validation and detection
- Inventory LoongArch systems and record their running kernel versions.
- Compare kernel packages against vendor advisories and the two referenced stable commits.
- Verify the updated kernel is active after maintenance.
- Review kernel logs for paging faults, BPF-related oops, RCU stalls, or unexpected OOM events.
- Run vendor-supported regression testing only in an isolated non-production environment.
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
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ATT&CK lookup starting points
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CVE-2025-40151 mapping review
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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.
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:H1.85.9LinuxVulnerability 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
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Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/d1158559315143e11bfaabcd4b2bea98c7ed1be9CVE reference, Linux
- https://git.kernel.org/stable/c/e82406c7cbdd368c5459b8a45e118811d2ba0794CVE reference, Linux
Products and packages named in the record
CWE details
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