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Critical· 9.8official fix available

CVE-2026-53086

A critical race condition vulnerability (CVE-2026-53086) in the Linux kernel's bcmgenet driver could allow attackers to disrupt network operations. The fix involves updating the kernel to prevent overzealous queue shutdowns during timeouts.

publishedJun 24, 2026
last modifiedJul 23, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
23th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Aug 23, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Users of the Linux kernel with the bcmgenet network driver

02

Real-world impact

Could lead to network service instability or denial-of-service conditions

03

Why this severity

CVSS 9.8 (critical): High confidence in exploitation potential and severe impact on confidentiality, integrity, and availability

04

What to do about it

official fix available
recommended steps
  1. 01Upgrade the Linux kernel to a version that includes the fix for CVE-2026-53086
  2. 02Verify the update resolves the race condition in the bcmgenet_timeout handler

NVD description of kernel fix

05

Timeline

  1. Jun 24, 2026 · Jun 24, 2026
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Jul 23, 2026 · 11d ago
    Advisory updated
    The NVD record was last revised.
  3. Jul 24, 2026 · 11d ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
CVE-2026-53086: A critical race condition vulnerability (CVE-2026-53086) in the Linux · Vulnary