CVE-2026-74717: net/mlx5: fw_tracer, return NULL on create error

mediumCVSS 4.1CVE-2026-74717

CSIRTS triage

vendor: Linux product: Linux kernelOther

What: The net/mlx5 fw_tracer function fails to return NULL on creation error, potentially leaving invalid pointers.
Who is affected: Systems running affected Linux kernel versions with Mellanox mlx5 network drivers.
Urgency: Medium severity (CVSS 4.1); not currently exploited but impacts stability and error handling.
Action: Update to a patched Linux kernel version addressing CVE-2026-74717.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 4.1
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74717

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-2026-747170.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74717	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

highCVE-2026-74717: In the Linux kernel, the following vulnerability has been resolved: net/mlx5: fw_tracer, retur…nvd

Recent advisories for net/mlx5

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-2026-74717: In the Linux kernel, the following vulnerability has been resolved: net/mlx5: fw_tracer, retur…nvd · 2026-08-22
highCVE-2026-72345: In the Linux kernel, the following vulnerability has been resolved: net/mlx5: LAG, Fix off-by-…nvd · 2026-08-15
unknownCVE-2026-72032: In the Linux kernel, the following vulnerability has been resolved: net/mlx5: HWS, fix matcher…nvd · 2026-08-15
unknownCVE-2026-72006: In the Linux kernel, the following vulnerability has been resolved: net/mlx5: free mlx5_st_idx…nvd · 2026-08-15
mediumCVE-2026-68293: net/mlx5: Fix MCIA register buffer overflow on 32 dword readsmsrc · 2026-08-11
highCVE-2026-68293: In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix MCIA registe…nvd · 2026-08-10