Use-after-free in Linux kernel - CVE-2026-64113
Published: July 20, 2026
Vulnerability identifier: #VU138529
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-64113
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in ixgbevf_clean_rx_irq() when processing received frames that trigger VEPA multicast source pruning. A local user can trigger this code path to cause a denial of service.
The issue occurs in NAPI softirq context when a freed skb is reused on the next loop iteration because the pointer is not cleared before continuing.
How to mitigate CVE-2026-64113
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/3d931ac62411a7e43b85dba5fe45e1a4a91bd5cb
- https://git.kernel.org/stable/c/55b3e91d62b2f7a24109b2d7c9f4c66d2e3b1ec1
- https://git.kernel.org/stable/c/5d49b568c188dc77199d8d2b959c91da8cc27cf1
- https://git.kernel.org/stable/c/6ef30384a50a50e4a484cddf341bc27de31aa3de
- https://git.kernel.org/stable/c/a244395d8c563ed1bb26c3ef708db6aeeaa08084
- https://git.kernel.org/stable/c/add70e2682c0ad3be2a5810bcf1bc13963ba4df9
- https://git.kernel.org/stable/c/dfef79e09ed2f5df975c98547f97f5d7f8982a24
- https://git.kernel.org/stable/c/e8768bcbe5cd30c4ea36a22022c9ffaa66903693