Security update for the Linux Kernel RT (Live Patch 7 for SLE 15 SP6)

This update for the Linux Kernel 6.4.0-1506001023 fixes several issues. The following security issues were fixed: CVE-2025-38087: net/sched: fix use-after-free in tapriodevnotifier bsc1245504. CVE-2025-21999: proc: fix UAF in procgetinode bsc1242579. CVE-2025-38001: netsched: hfsc: Address...

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...

SUSE-SU-2025:03106-1 Security update for the Linux Kernel RT (Live Patch 0 for SLE 15 SP7)

This update for the Linux Kernel 6.4.0-1507005 fixes several issues. The following security issues were fixed: - CVE-2025-38087: net/sched: fix use-after-free in tapriodevnotifier bsc1245504. - CVE-2025-38001: netsched: hfsc: Address reentrant enqueue adding class to eltree twice bsc1244235. -...

kernel: net/sched: ets: use old 'nbands' while purging unused classes

In the Linux kernel, the following vulnerability has been resolved: net/sched: ets: use old 'nbands' while purging unused classes Shuang reported schets test-case 1 crashing in etsclassqlennotify after recent changes from Lion 2. The problem is: in etsqdiscchange we purge unused DWRR queues; the...

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

CVE-2025-39677: In the Linux kernel, backlog accounting was fixed for qdisc_dequeue_internal affecting tbf-backed qdiscs (hhf, fq, fq_codel, fq_pie). The root cause was that when dropping packets to satisfy a new limit, only qlen was accounted for for some cases (gso_skb path), omitting qdisc_qst...

net/sched: Restrict conditions for adding duplicating netems to qdisc tree

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Oracle Linux 9 : kernel (ELSA-2025-15011)

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2025-15011 advisory. - xfrm: interface: fix use-after-free after changing collectmd xfrm interface CKI Backport Bot RHEL-109529 CVE-2025-38500 - s390/pci: Fix duplicate...

kernel: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc

A use-after-free vulnerability has been identified in the Linux kernel's HFSC Hierarchical Fair Service Curve queuing discipline when it is configured with NETEM Network Emulation as a child. This flaw can lead to a kernel panic or crash due to incorrect assumptions about the queue state...

kernel: net/sched: Always pass notifications when child class becomes empty

A use-after-free UAF vulnerability was found in the Linux kernel's net/sched subsystem, specifically in the Credit-Based Shaper CBS qdisc implementation schcbs. The vulnerability occurs because the CBS qdisc's reset function qdiscresetqueue only resets its internal queue but fails to reset its...

Linux Distros Unpatched Vulnerability : CVE-2025-38553

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net/sched: Restrict conditions for adding duplicating netems to qdisc tree netemenqueue's duplication prevention logic breaks when a netem resides in a qdisc tr...

kernel: net/sched: Always pass notifications when child class becomes empty

A use-after-free UAF vulnerability was found in the Linux kernel's net/sched subsystem, specifically in the Credit-Based Shaper CBS qdisc implementation schcbs. The vulnerability occurs because the CBS qdisc's reset function qdiscresetqueue only resets its internal queue but fails to reset its...

Important: Red Hat Security Advisory: kernel-rt security update

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions. 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...

kernel: net/sched: Always pass notifications when child class becomes empty

A use-after-free UAF vulnerability was found in the Linux kernel's net/sched subsystem, specifically in the Credit-Based Shaper CBS qdisc implementation schcbs. The vulnerability occurs because the CBS qdisc's reset function qdiscresetqueue only resets its internal queue but fails to reset its...

kernel: sch_hfsc: make hfsc_qlen_notify() idempotent

In the Linux kernel, the following vulnerability has been resolved: schhfsc: make hfscqlennotify idempotent hfscqlennotify is not idempotent either and not friendly to its callers, like fqcodeldequeue. Let's make it idempotent to ease qdisctreereducebacklog callers' life: 1. updatevf decreases...

kernel: net/sched: Always pass notifications when child class becomes empty

A use-after-free UAF vulnerability was found in the Linux kernel's net/sched subsystem, specifically in the Credit-Based Shaper CBS qdisc implementation schcbs. The vulnerability occurs because the CBS qdisc's reset function qdiscresetqueue only resets its internal queue but fails to reset its...