Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098822)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098822 advisory. In the Linux kernel, the following vulnerability has been resolved: net/sched: clsflow: fix NULL pointer dereference on shared blocks flowchange calls tcfblockq and...

The vulnerability of the flow_change() function in the net/sched/cls_flow.c module of the net/sched/traffic control subsystem in the Linux operating system allows a attacker to cause a service failure.

The vulnerability of the flowchange function in the net/sched/clsflow.c module of the net/sched subsystem of the Linux operating system’s kernel is related to the pointer manipulation. Exploiting this vulnerability could allow an attacker to cause a service failure...

CVE-2026-74290

A flaw was found in the Linux kernel's clsflow module. A local user, by operating a traffic control tc classifier within a user or network namespace, could manipulate specific parameters. This manipulation allows the user to recover sensitive 32-bit folded kernel pointer values, leading to...

CVE-2026-74290

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsflow: Dont expose folded kernel pointers The flow classifier falls back to addrfold for fields that are missing from packet headers. In map mode, userspace controls mask, xor, rshift, addend and divisor, and can...

CVE-2026-74290

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsflow: Dont expose folded kernel pointers The flow classifier falls back to addrfold for fields that are missing from packet headers. In map mode, userspace controls mask, xor, rshift, addend and divisor, and can...

UBUNTU-CVE-2026-74290

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsflow: Dont expose folded kernel pointers The flow classifier falls back to addrfold for fields that are missing from packet headers. In map mode, userspace controls mask, xor, rshift, addend and divisor, and can...

CVE-2026-74290 net/sched: cls_flow: Dont expose folded kernel pointers

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsflow: Dont expose folded kernel pointers The flow classifier falls back to addrfold for fields that are missing from packet headers. In map mode, userspace controls mask, xor, rshift, addend and divisor, and can...

EUVD-2026-59437

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsflow: Dont expose folded kernel pointers The flow classifier falls back to addrfold for fields that are missing from packet headers. In map mode, userspace controls mask, xor, rshift, addend and divisor, and can...

CVE-2026-74290 net/sched: cls_flow: Dont expose folded kernel pointers

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsflow: Dont expose folded kernel pointers The flow classifier falls back to addrfold for fields that are missing from packet headers. In map mode, userspace controls mask, xor, rshift, addend and divisor, and can...

CVE-2026-74290

The CVE-2026-74290 issue affects the Linux kernel’s net/sched cls_flow flow classifier. The vulnerability arises because, in map mode, userspace can manipulate mask, xor, rshift, addend and divisor and observe the resulting classid via statistics, enabling a tc classifier in a user/network namesp...

Linux Distros Unpatched Vulnerability : CVE-2026-74290

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net/sched: clsflow: Dont expose folded kernel pointers The flow classifier falls back to addrfold for fields that are missing from packet headers. In map mode,...

CVE-2026-31422

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsflow: fix NULL pointer dereference on shared blocks flowchange calls tcfblockq and dereferences q-handle to derive a default baseclass. Shared blocks leave block-q NULL, causing a NULL deref when a flow filter witho...

CVE-2025-21653

In the Linux kernel, the following vulnerability has been resolved: netsched: clsflow: validate TCAFLOWRSHIFT attribute syzbot found that TCAFLOWRSHIFT attribute was not validated. Right shitfing a 32bit integer is undefined for large shift values. UBSAN: shift-out-of-bounds in...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from the clsflow module not validating the TCAFLOWRSHIFT attribute, which could result in out-of-range shift...