CVE-2026-53088
CVE-2026-53088 is a critical off‑by‑one flaw in the Linux kernel’s bcmgenet network driver (CWE‑193) that could allow remote attackers to execute arbitrary code. The vulnerability has been resolved in the kernel by correcting the bcmgenet_put_txcb function. Users should apply the kernel fix to eliminate the risk.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Linux kernel (including version 4.13 and related releases).
Real-world impact
An attacker could exploit this flaw to gain full control of an affected system.
Why this severity
CVSS v3.1 base score 9.8 (Critical) due to network‑adjacent, low‑complexity attack with no privileges or user interaction required, leading to high impact on confidentiality, integrity, and availability.
What to do about it
- 01Upgrade the Linux kernel to a version that includes the fix for the bcmgenet_put_txcb off‑by‑one error (as noted in the NVD description).
NVD description
Timeline
- Jun 24, 2026 · Jun 24, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jul 23, 2026 · 11d agoAdvisory updatedThe NVD record was last revised.
- Jul 24, 2026 · 11d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.
How it’s attacked
References & advisories
- git.kernel.org/stable/c/14e9f86564fff7bcf7…patch
- git.kernel.org/stable/c/29394f722f620281f2…patch
- git.kernel.org/stable/c/2a74590170427a3ca7…patch
- git.kernel.org/stable/c/4cab761fc51c65aef7…patch
- git.kernel.org/stable/c/57f3f53d2c9c5a9e13…patch
- git.kernel.org/stable/c/72df896e31ddd06fcc…patch
- git.kernel.org/stable/c/85f34ec320d3881bad…patch
- git.kernel.org/stable/c/fb9a3c1f547d0ff024…patch