Memory corruption in Linux kernel - CVE-2026-53199
Published: June 26, 2026
Vulnerability identifier: #VU135585
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-2026-53199
CWE-ID: CWE-119
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 improper memory access in netvsc_copy_to_send_buf() when copying skb fragments into the VMBus send buffer. A local user can trigger packet transmission with page-backed fragments to cause a denial of service.
The issue occurs on 32-bit x86 systems with CONFIG_HIGHMEM enabled when fragment pages reside above the LOWMEM boundary, and the fault happens on the transmit softirq path.
How to mitigate CVE-2026-53199
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/004e9ecfe6c5384f9e0b2f6f6389d42ec22789af
- https://git.kernel.org/stable/c/09b8a7aa5a341bb345dc492aac139525efa13515
- https://git.kernel.org/stable/c/0b38870d81ab3a04c1ab0598d9d3285f5d9d0584
- https://git.kernel.org/stable/c/16514afeb7d3d121072ba9a0b640d6c1c5507db0
- https://git.kernel.org/stable/c/695c59cf7bf707e6ff8cea01916ee50e86616933
- https://git.kernel.org/stable/c/918c0c988239aa5ab96b254e504d191af6191061
- https://git.kernel.org/stable/c/a82d4251918f37d9c5aab7b365157669fb885ec3
- https://git.kernel.org/stable/c/fe7221b4346418d27ec2daccfc09df6692b76f0b