PT-2026-72702

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch dualpi2: Do not call qdisc tree reduce backlog during peek before restoring qlen Whenever dualpi2 drops packets during peek, it calls qdisc tree reduce backlog. An issue arises because it calls qdisc tree reduce...

PT-2026-72720

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch hfsc: Don't make class passive twice update vf is called from two places for the same class during a single dequeue when the class's child qdisc e.g. codel/fq codel drops its last packets while dequeuing: 1. The...

PT-2026-72578

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch teql: Introduce slaves lock to avoid race condition and UAF The teql master-slaves singly linked list is not protected against multiple writes. It can be mod'ed concurently from teql master xmit, teql dequeue, teql...

PT-2026-72246

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the net/sched component where the tcf ct handle fragments function calls nf ct handle fragments without saving and restoring the skb-cb control buffer. Because the...

DEBIAN-CVE-2026-68441

In the Linux kernel, the following vulnerability has been resolved: net/sched: Handle TCACTREDIRECT from qdisc filter chains When a TC filter attached to a qdisc filter chain returns TCACTREDIRECT ex: via an eBPF program calling bpfredirect or an actbpf action, the redirect was silently lost i.e ...

CVE-2026-68441

In the Linux kernel, the following vulnerability has been resolved: net/sched: Handle TCACTREDIRECT from qdisc filter chains When a TC filter attached to a qdisc filter chain returns TCACTREDIRECT ex: via an eBPF program calling bpfredirect or an actbpf action, the redirect was silently lost i.e ...

CVE-2026-68441 net/sched: Handle TC_ACT_REDIRECT from qdisc filter chains

In the Linux kernel, the following vulnerability has been resolved: net/sched: Handle TCACTREDIRECT from qdisc filter chains When a TC filter attached to a qdisc filter chain returns TCACTREDIRECT ex: via an eBPF program calling bpfredirect or an actbpf action, the redirect was silently lost i.e ...

CVE-2026-68337

A flaw was found in the Linux kernel. The BPF Berkeley Packet Filter redirect helpers, specifically bpfredirect and skbdoredirect, can attempt to dereference a null pointer if a bpfnetcontext is not established. This can occur when certain BPF programs are attached to a network queueing disciplin...

CVE-2026-68337

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject redirect helpers without a bpfnetcontext The bpfredirect helpers and skbdoredirect obtain the per-task bpfredirectinfo via bpfnetctxgetri, which dereferences the current-bpfnetcontext unconditionally. That context is...

CVE-2026-68138

In the Linux kernel, the following vulnerability has been resolved: net/sched: serialize qdiscrtablist against concurrent get/put qdiscgetrtab and qdiscputrtab mutate the process-global singly linked list qdiscrtablist and a plain non-atomic 'int refcnt' with no lock. This was only safe because...

CVE-2026-68138 net/sched: serialize qdisc_rtab_list against concurrent get/put

In the Linux kernel, the following vulnerability has been resolved: net/sched: serialize qdiscrtablist against concurrent get/put qdiscgetrtab and qdiscputrtab mutate the process-global singly linked list qdiscrtablist and a plain non-atomic 'int refcnt' with no lock. This was only safe because...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net/sched: ets: Remove a drr class from the active list if it changes to strict. Whenever a user issues a ets qdisc change command, transforming a drr class into a strict one, the ets code does not check whether that class was in...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: net: sched: avoiding a race condition for qdiscresetalltxgt when dealing with lockless qdiscs When reducing the number of real TX queues, the netifsetrealnumtxqueues function calls qdiscresetalltxgt to flush the qdiscs for queues...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net/sched: ets: Always remove the class from the active list before deleting it in etsqdiscchange. The vulnerability is a race condition between etsqdiscdequeue and etsqdiscchange. This causes a Use-After-Freeze UAF error on the...

CVE-2026-64530

CVE-2026-64530 affects the Linux kernel net/sched subsystem. The root cause is that tcf_qevent_handle() did not properly handle TC_ACT_CONSUMED, causing the skb to be returned to the caller as if classification passed, while the defragmentation engine still owned it. This led to a use-after-free ...

PT-2026-64797

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the net/sched component where the tcf qevent handle function fails to properly handle the TC ACT CONSUMED return value from tcf classify. This occurs when a socket...

MiracleLinux 8 : kernel-4.18.0-553.143.1.el8_10 (AXSA:2026-1337:51)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1337:51 advisory. - net/sched: ets: Always remove class from active list before deleting in etsqdiscchange CVE-2025-71066 - kernel: stale page table entries in IOMMU...

CVE-2026-64012 net/sched: sch_sfb: Replace direct dequeue call with peek and qdisc_dequeue_peeked

In the Linux kernel, the following vulnerability has been resolved: net/sched: schsfb: Replace direct dequeue call with peek and qdiscdequeuepeeked When sfb has children eg qfq qdisc whose peek callback is qdiscpeekdequeued, we could get a kernel panic. When the parent of such qdiscs eg illustrat...

EUVD-2026-45585

In the Linux kernel, the following vulnerability has been resolved: net/sched: schsfb: Replace direct dequeue call with peek and qdiscdequeuepeeked When sfb has children eg qfq qdisc whose peek callback is qdiscpeekdequeued, we could get a kernel panic. When the parent of such qdiscs eg illustrat...

PT-2026-61329

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the sch sfb component of the network scheduler. When sfb has children, such as a qfq qdisc, a kernel panic can occur due to a null-pointer dereference. This happens wh...