Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-107287)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-107287 advisory. In the Linux kernel, the following vulnerability has been resolved: netsched: Prevent creation of classes with TCHROOT The function qdisctreereducebacklog uses TCHRO...

Unity Linux 20.1070e Security Update: kernel (UTSA-2025-001481)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-001481 advisory. In the Linux kernel, the following vulnerability has been resolved: net/sched: stop qdisctreereducebacklog on TCHROOT In qdisctreereducebacklog, Qdiscs with major...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098825)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098825 advisory. In the Linux kernel, the following vulnerability has been resolved: netsched: Prevent creation of classes with TCHROOT The function qdisctreereducebacklog uses TCHRO...

EUVD-2024-50473

Malicious code in bioql PyPI...

EUVD-2025-9349

Malicious code in bioql PyPI...

Linux Distros Unpatched Vulnerability : CVE-2025-21971

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - netsched: Prevent creation of classes with TCHROOT The function qdisctreereducebacklog uses TCHROOT as a termination condition when traversing up the qdisc tree...

CVE-2025-21971

In the Linux kernel, the following vulnerability has been resolved: netsched: Prevent creation of classes with TCHROOT The function qdisctreereducebacklog uses TCHROOT as a termination condition when traversing up the qdisc tree to update parent backlog counters. However, if a class is created wi...

CVE-2025-21971 net_sched: Prevent creation of classes with TC_H_ROOT

In the Linux kernel, the following vulnerability has been resolved: netsched: Prevent creation of classes with TCHROOT The function qdisctreereducebacklog uses TCHROOT as a termination condition when traversing up the qdisc tree to update parent backlog counters. However, if a class is created wi...

CVE-2025-21971 net_sched: Prevent creation of classes with TC_H_ROOT

In the Linux kernel, the following vulnerability has been resolved: netsched: Prevent creation of classes with TCHROOT The function qdisctreereducebacklog uses TCHROOT as a termination condition when traversing up the qdisc tree to update parent backlog counters. However, if a class is created wi...

CVE-2025-21971 net_sched: Prevent creation of classes with TC_H_ROOT

In the Linux kernel, the following vulnerability has been resolved: netsched: Prevent creation of classes with TCHROOT The function qdisctreereducebacklog uses TCHROOT as a termination condition when traversing up the qdisc tree to update parent backlog counters. However, if a class is created wi...

CVE-2025-21971

Summary (CVE-2025-21971): In the Linux kernel, an issue in net_sched can cause incorrect parent backlog statistics when a Qdisc class is created with classid TC_H_ROOT (0xFFFFFFFF). The traversal in qdisc_tree_reduce_backlog() terminates at TC_H_ROOT instead of the actual root, which can lead to ...

CVE-2025-21971: Loop with Unreachable Exit Condition

In the Linux kernel, the following vulnerability has been resolved: netsched: Prevent creation of classes with TCHROOT The function qdisctreereducebacklog uses TCHROOT as a termination condition when traversing up the qdisc tree to update parent backlog counters. However, if a class is created wi...

Linux Kernel Security Vulnerabilities

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 netsched module allowing the creation of the TCHROOT class, which could lead to incorrectly maintained...

CVE-2024-53057 net/sched: stop qdisc_tree_reduce_backlog on TC_H_ROOT

In the Linux kernel, the following vulnerability has been resolved: net/sched: stop qdisctreereducebacklog on TCHROOT In qdisctreereducebacklog, Qdiscs with major handle ffff: are assumed to be either root or ingress. This assumption is bogus since it's valid to create egress qdiscs with major...

CVE-2024-53057

CVE-2024-53057 affects Linux kernel net/sched: qdisc_tree_reduce_backlog can UAF when major handle ffff: exists (egress qdiscs). Root cause: ffff: assumed to be root/ingress, fixed by stopping at TC_H_ROOT; the fix updates to avoid iterating into an ingress qdisc and halts when parent is TC_H_ROO...

CVE-2024-53057: Use After Free

In the Linux kernel, the following vulnerability has been resolved: net/sched: stop qdisctreereducebacklog on TCHROOT In qdisctreereducebacklog, Qdiscs with major handle ffff: are assumed to be either root or ingress. This assumption is bogus since it's valid to create egress qdiscs with major...