CVE-2026-43465: net/mlx5e: RX, Fix XDP multi-buf frag counting for striding RQ
CSIRTS triage
- What
- Incorrect XDP multi-buffer fragment counting in the Mellanox mlx5 driver's striding RQ implementation.
- Who is affected
- Systems using Mellanox ConnectX network adapters with XDP multi-buffer workloads.
- Urgency
- Medium priority; affects XDP performance and correctness on affected NICs.
- Action
- Apply kernel patch correcting fragment count calculation in net/mlx5e or upgrade kernel.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43465
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-434650.41% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 35% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-43465 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownMultiple vulnerabilities in Ubuntu Linux kernel (August 14, 2026)cert-fr-avis
- unknownUSN-8630-2: Linux kernel vulnerabilitiesubuntu
- unknownUSN-8636-1: Linux kernel vulnerabilitiesubuntu
- unknownUSN-8630-1: Linux kernel vulnerabilitiesubuntu
- unknownMultiple vulnerabilities in SUSE Linux kernel (July 31, 2026)cert-fr-avis
Recent advisories for net/mlx5e
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highCVE-2026-72344: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: TC, skip peer f…nvd · 2026-08-15
- highCVE-2026-72343: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix HV VHCA sta…nvd · 2026-08-15
- highCVE-2026-72342: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix HV VHCA sta…nvd · 2026-08-15
- unknownCVE-2026-72341: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix publication…nvd · 2026-08-15
- highCVE-2026-72072: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: macsec: fix use…nvd · 2026-08-15
- unknownCVE-2026-68139: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Use sender devc…nvd · 2026-08-10
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