CVE-2026-52997

The CVE-2026-52997 issue affects the Linux kernel’s net/sched sch_dualpi2 qdisc. The root cause was that dualpi2_change() could attempt to dequeue from the C-queue even when it was empty while packets resided in the L-queue, leading to a NULL skb dereference during limit/memlimit enforcement. The...

SUSE CVE-2026-43496

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

CVE-2026-43496

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

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 a race condition between etsqdiscchange and etsqdiscdequeue in net/sched: ets that could lead to reuse after...

Important: kernel-livepatch-6.12.40-63.107

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix backlog accounting in qdiscdequeueinternal CVE-2025-39677 Affected Packages: kernel-livepatch-6.12.40-63.107 Issue Correction: Please ensure you have live patching enabled. Run dnf update...

Important: kernel-livepatch-6.12.37-61.105

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix backlog accounting in qdiscdequeueinternal CVE-2025-39677 Affected Packages: kernel-livepatch-6.12.37-61.105 Issue Correction: Please ensure you have live patching enabled. Run dnf update...

Important: kernel-livepatch-6.12.40-64.114

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix backlog accounting in qdiscdequeueinternal CVE-2025-39677 Affected Packages: kernel-livepatch-6.12.40-64.114 Issue Correction: Please ensure you have live patching enabled. Run dnf update...

Important: kernel-livepatch-6.12.40-63.114

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix backlog accounting in qdiscdequeueinternal CVE-2025-39677 Affected Packages: kernel-livepatch-6.12.40-63.114 Issue Correction: Please ensure you have live patching enabled. Run dnf update...

Important: kernel-livepatch-6.12.35-55.103

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix backlog accounting in qdiscdequeueinternal CVE-2025-39677 Affected Packages: kernel-livepatch-6.12.35-55.103 Issue Correction: Please ensure you have live patching enabled. Run dnf update...

Important: kernel-livepatch-6.12.31-35.92

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix backlog accounting in qdiscdequeueinternal CVE-2025-39677 Affected Packages: kernel-livepatch-6.12.31-35.92 Issue Correction: Please ensure you have live patching enabled. Run dnf update...

Important: kernel-livepatch-6.1.148-173.267

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix backlog accounting in qdiscdequeueinternal CVE-2025-39677 In the Linux kernel, the following vulnerability has been resolved: fs/buffer: fix use-after-free when call bhread helper CVE-2025-39691...

SUSE CVE-2025-39677

In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix backlog accounting in qdiscdequeueinternal This issue applies for the following qdiscs: hhf, fq, fqcodel, and fqpie, and occurs in their change handlers when adjusting to the new limit. The problem is the following...

net/sched: Fix backlog accounting in qdisc_dequeue_internal

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DEBIAN-CVE-2025-39677

In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix backlog accounting in qdiscdequeueinternal This issue applies for the following qdiscs: hhf, fq, fqcodel, and fqpie, and occurs in their change handlers when adjusting to the new limit. The problem is the following...

AZL-66986 CVE-2025-39677 affecting package kernel 6.6.126.1-1

In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix backlog accounting in qdiscdequeueinternal This issue applies for the following qdiscs: hhf, fq, fqcodel, and fqpie, and occurs in their change handlers when adjusting to the new limit. The problem is the following...

UBUNTU-CVE-2025-39677

In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix backlog accounting in qdiscdequeueinternal This issue applies for the following qdiscs: hhf, fq, fqcodel, and fqpie, and occurs in their change handlers when adjusting to the new limit. The problem is the following...

CVE-2025-39677 net/sched: Fix backlog accounting in qdisc_dequeue_internal

In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix backlog accounting in qdiscdequeueinternal This issue applies for the following qdiscs: hhf, fq, fqcodel, and fqpie, and occurs in their change handlers when adjusting to the new limit. The problem is the following...

CVE-2025-39677

Summary: CVE-2025-39677 affects the Linux kernel net/sched backlog accounting in qdisc_dequeue_internal for hhf, fq, fq_codel, and fq_pie. The issue occurs when adjusting to a new backlog limit; dequeue paths drop packets from gso_skb without increasing qstats backlog, causing backlog underflow i...

UBUNTU-CVE-2025-37798

In the Linux kernel, the following vulnerability has been resolved: codel: remove sch-q.qlen check before qdisctreereducebacklog After making all -qlennotify callbacks idempotent, now it is safe to remove the check of qlen!=0 from both fqcodeldequeue and codelqdiscdequeue...

PT-2025-36272

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A flaw exists in the Linux kernel's networking scheduler related to backlog accounting within the qdisc dequeue internal function. This issue affects the hhf, fq, fq codel, and fq pie...