Memory corruption in Linux kernel - CVE-2026-53199

Vulnerability identifier: #VU135585

CSH Severity: Low

CVSS v4: 6.8 [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]

CVE-ID: CVE-2026-53199

CWE-ID: CWE-119

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Linux kernel
openEuler
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-headers
kernel-source
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python3-perf
python3-perf-debuginfo

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel - update to 5.10.0-331.0.0.232
bpftool - update to 5.10.0-331.0.0.232
bpftool-debuginfo - update to 5.10.0-331.0.0.232
kernel-debuginfo - update to 5.10.0-331.0.0.232
kernel-debugsource - update to 5.10.0-331.0.0.232
kernel-devel - update to 5.10.0-331.0.0.232
kernel-headers - update to 5.10.0-331.0.0.232
kernel-source - update to 5.10.0-331.0.0.232
kernel-tools - update to 5.10.0-331.0.0.232
kernel-tools-debuginfo - update to 5.10.0-331.0.0.232
kernel-tools-devel - update to 5.10.0-331.0.0.232
perf - update to 5.10.0-331.0.0.232
perf-debuginfo - update to 5.10.0-331.0.0.232
python3-perf - update to 5.10.0-331.0.0.232
python3-perf-debuginfo - update to 5.10.0-331.0.0.232

• 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

• Memory corruption in Linux kernel net hyperv driver
• openEuler 22.03 LTS SP4 update for kernel