Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL pointer dereference on shared blocks The oldmethod path in fwclassify calls tcfblockq, and dereferences q-handle. Shared blocks leave block-q as NULL, causing a NULL dereference when an empty clsfw filt...

The vulnerability of the fw_classify() function in the net/sched/cls_fw.c module of the network scheduling subsystem of the Linux operating system allows a hacker to induce a service failure.

The vulnerability of the fwclassify function in the net/sched/clsfw.c file of the network scheduling subsystem in the Linux operating system is related to pointer manipulation. Exploiting this vulnerability could allow an attacker to cause a service failure...

Unity Linux 20.1050e Security Update: kernel (UTSA-2026-102035)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-102035 advisory. In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL pointer dereference on shared blocks The old-method path in fwclassify...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-100548)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-100548 advisory. In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL dereference of old filters before change Like pointed out by Sashiko 1...

K000162854: Linux Kernel vulnerability CVE-2026-53080

Security Advisory Description In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL dereference of "old" filters before change Like pointed out by Sashiko 1, since commit ed76f5edccc9 "net: sched: protect filterchain list with filterchainlock mutex" TC...

Medium: kernel

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL dereference of "old" filters before change CVE-2026-53080 Affected Packages: kernel Issue Correction: Run dnf update kernel --releasever 2023.12.20260706 or dnf update --advisory...

Medium: kernel6.12

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL dereference of "old" filters before change CVE-2026-53080 Affected Packages: kernel6.12 Issue Correction: Run dnf update kernel6.12 --releasever 2023.12.20260706 or dnf update --advisory...

AZL-90789 CVE-2026-53080 affecting package kernel for versions less than 6.6.143.1-1

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL dereference of "old" filters before change Like pointed out by Sashiko 1, since commit ed76f5edccc9 "net: sched: protect filterchain list with filterchainlock mutex" TC filters are added to a shared blo...

CVE-2026-53080 net/sched: cls_fw: fix NULL dereference of "old" filters before change()

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL dereference of "old" filters before change Like pointed out by Sashiko 1, since commit ed76f5edccc9 "net: sched: protect filterchain list with filterchainlock mutex" TC filters are added to a shared blo...

CVE-2026-53080: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL dereference of "old" filters before change Like pointed out by Sashiko 1, since commit ed76f5edccc9 "net: sched: protect filterchain list with filterchainlock mutex" TC filters are added to a shared blo...

CVE-2026-31421

A flaw was found in the Linux kernel's clsfw network scheduler component. This vulnerability, a null pointer dereference, occurs when an empty clsfw filter is attached to a shared block and a specially crafted network packet with a specific mark is processed. An attacker with network access could...

CVE-2026-31421

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL pointer dereference on shared blocks The old-method path in fwclassify calls tcfblockq and dereferences q-handle. Shared blocks leave block-q NULL, causing a NULL deref when an empty clsfw filter is...

AZL-82721 CVE-2026-31421 affecting package kernel for versions less than 6.6.134.1-2

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL pointer dereference on shared blocks The old-method path in fwclassify calls tcfblockq and dereferences q-handle. Shared blocks leave block-q NULL, causing a NULL deref when an empty clsfw filter is...

CVE-2026-31421

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL pointer dereference on shared blocks The old-method path in fwclassify calls tcfblockq and dereferences q-handle. Shared blocks leave block-q NULL, causing a NULL deref when an empty clsfw filter is...

CVE-2026-31421: NULL Pointer Dereference

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL pointer dereference on shared blocks The old-method path in fwclassify calls tcfblockq and dereferences q-handle. Shared blocks leave block-q NULL, causing a NULL deref when an empty clsfw filter is...

EUVD-2023-54081

Malicious code in bioql PyPI...

EUVD-2023-44409

Malicious code in bioql PyPI...

Important: Red Hat Security Advisory: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 6 Extended Lifecycle Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for...

kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function

A use-after-free vulnerability was found in fwsetparms in net/sched/clsfw.c in network scheduler sub-component in the Linux Kernel. This issue occurs due to a missing sanity check during cleanup at the time of failure, leading to a misleading reference. This may allow a local attacker to gain loc...

CentOS: Security Advisory for bpftool (CESA-2023:7423)

The remote host is missing an update for the SPDX-FileCopyrightText: 2024 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...