Bluetooth: btintel_pcie: fix plen overflow in btintel_pcie_recv_frame()
CVSS score
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EPSS probability
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Risk score
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Published
8 h ago
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
2
Source agreement
Tam uyum
Evidence confidence
%63
Short explanation
A plen overflow vulnerability exists in the Linux kernel Bluetooth btintel_pcie subsystem within the btintel_pcie_recv_frame() function. This issue causes the length calculation to wrap, bypassing packet checks and leading to packet truncation via skb_trim().
Overflow vulnerabilities in Bluetooth subsystems require careful review because they can compromise packet integrity and lead to unexpected behavior during network or local data processing.
What should be done?
- Update the affected kernel component or follow vendor advisories
- Apply code fixes that widen the plen variable to u32
Chain of evidence and sources
plen değeri u16 olarak hesaplandığı için 0xFFFC ve üzeri değerler toplamın sarmasına neden olur.
Bu taşma "skb->len < plen" kontrolünü atlatarak skb_trim() fonksiyonunun paketi kesmesine izin verir.
Show the technical text from the sources
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btintel_pcie: fix plen overflow in btintel_pcie_recv_frame() plen is u16 and computed as HDR_SIZE + dlen. For ACL/ISO frames dlen is a 16-bit field, so a value >= 0xFFFC wraps the sum, bypassing the "skb->len < plen" check and letting skb_trim() truncate the packet. Widen plen to u32 so the addition cannot wrap.
Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.
IMPACT: Affected Products and Software
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Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-98731 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-98731 weaknesses.
Official Sources and Advisories
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