net/mlx5: Fix slab-out-of-bounds when handling team device events
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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
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Source agreement
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Evidence confidence
%63
Short explanation
A vulnerability has been identified in the Linux kernel net/mlx5 driver that causes slab-out-of-bounds memory access when handling team device events.
This vulnerability causes out-of-bounds memory accesses within the Linux kernel, leading to potential memory safety issues and system instability.
What should be done?
- Follow vendor advisories and updates
- Apply the relevant kernel patches
Chain of evidence and sources
Linux çekirdeğindeki net/mlx5 bileşeni, team aygıtı olayları işlenirken slab-out-of-bounds hatasına açıktır.
Team_port yapısının bond slave yapısından küçük olması KASAN tarafından bellek sınır dışı erişimi olarak tespit edilmektedir.
Show the technical text from the sources
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix slab-out-of-bounds when handling team device events The mlx5_handle_changeupper_event() and mlx5_handle_changeinfodata_event() functions check for LAG masters (which includes both bonding and team devices) but only call bonding-specific APIs. When processing team device events, calling bond_slave_get_rcu() and bond_is_slave_inactive() on team_port structures causes KASAN to detect an out-of-bounds memory access since team_port is smaller than bond slave. Fix this by wrapping the bond-specific API calls with a check for bonding devices. This allows the function to still process LAG events for both bonding and teams but only calls bond-specific functions when dealing with actual bonding devices. For mlx5_handle_changeinfodata_event(), keep the explicit bond check as mlx5 doesn't handle state information for team ports anyway. Tested with Mellanox ConnectX-5 on Linux 7.2.0-rc6: - Bonding: PASS (no regressions) - Team device: PASS (no KASAN errors)
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
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
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| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
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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-2026-98807 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
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Official Sources and Advisories
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