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CVE Record

CVE-2025-71270: LoongArch: Enable exception fixup for specific ADE subcode

In the Linux kernel, the following vulnerability has been resolved: LoongArch: Enable exception fixup for specific ADE subcode This patch allows the LoongArch BPF JIT to handle recoverable memory access errors generated by BPF_PROBE_MEM* instructions. When a BPF program performs memory access operations, the instructions it executes may trigger ADEM exceptions. The kernel’s built-in BPF exception table mechanism (EX_TYPE_BPF) will generate corresponding exception fixup entries in the JIT compilation phase; however, the architecture-specific trap handling function needs to proactively call the common fixup routine to achieve exception recovery. do_ade(): fix EX_TYPE_BPF memory access exceptions for BPF programs, ensure safe execution. Relevant test cases: illegal address access tests in module_attach and subprogs_extable of selftests/bpf.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue affects LoongArch systems where BPF programs can trigger recoverable memory-access exceptions that were not being handled correctly. The published record does not provide a severity score, exploit evidence, or business-impact detail. Treat it as a kernel maintenance item for LoongArch fleets until vendor guidance adds more urgency.

Executive priority

Prioritize for organizations operating LoongArch Linux systems, especially custom kernels or environments using BPF. For most enterprises without LoongArch exposure, business urgency is low. Escalate if a vendor assigns severity, confirms broader impact, or reports exploitation.

Technical view

The LoongArch BPF JIT generated EX_TYPE_BPF exception-table entries for BPF_PROBE_MEM* memory access, but do_ade() did not call the common fixup path for specific ADEM exceptions. The fix enables exception recovery so illegal probe-memory accesses can be handled safely. Kernel BPF selftests module_attach and subprogs_extable are cited as relevant.

Likely exposure

Exposure appears limited to Linux kernels on LoongArch using the BPF JIT. The CVE record lists Linux as affected with version entries including 6.2, 6.6.124, 6.12.70, 6.18.10, and 6.19, but it does not map distribution packages or configurations.

Exploitation context

The provided sources do not report active exploitation, public exploit code, or KEV listing. They describe a correctness and safety fix for BPF exception handling. Practical exploitability and privilege requirements are not established in the source bundle.

Researcher notes

Key evidence is limited to the CVE description and stable kernel commit references. The defect is architecture-specific and tied to BPF JIT exception fixup. No CVSS, CWE, distribution advisory, or exploit status is provided in the supplied bundle.

Mitigation direction

  • Inventory LoongArch Linux hosts and their running kernel versions.
  • Review distribution or kernel vendor guidance for fixed packages.
  • Apply kernel updates containing the referenced stable fixes when available.
  • Maintain existing controls limiting untrusted BPF use where operationally feasible.

Validation and detection

  • Confirm whether each LoongArch host runs an affected kernel version.
  • Check vendor changelogs for the listed stable commit references.
  • Verify updated kernels are booted after maintenance.
  • Run relevant BPF regression tests if you build custom kernels.
Prepared
Confidence
medium
Sources
6

Public sources used

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

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CVE-2025-71270 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
3Timeline events
0ADP providers
5Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxdbcd7f5fafea64dbe588c4ec18bc309fde5d1e1c, dbcd7f5fafea64dbe588c4ec18bc309fde5d1e1c, dbcd7f5fafea64dbe588c4ec18bc309fde5d1e1c, dbcd7f5fafea64dbe588c4ec18bc309fde5d1e1cunaffected
LinuxLinux6.2, 0, 6.6.124, 6.12.70, 6.18.10, 6.19affected
Weakness

CWE details

No CWE listed

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