CVE-2025-38553

CVE-2025-38553 affects the Linux kernel (net/sched). The issue concerns the duplication logic for netem instances in a qdisc tree, where the existing netem_enqueue handling can misbehave when a netem coexists with others, potentially causing a soft lockup or OOM loop in netem_dequeue. The connect...

CVE-2025-38553 net/sched: Restrict conditions for adding duplicating netems to qdisc tree

In the Linux kernel, the following vulnerability has been resolved: net/sched: Restrict conditions for adding duplicating netems to qdisc tree netemenqueue's duplication prevention logic breaks when a netem resides in a qdisc tree with other netems - this can lead to a soft lockup and OOM loop in...

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 the duplicate prevention logic of netemenqueue failing in the presence of multiple netems in the qdisc tree,...

ALSA-2025:13960 Important: kernel security update

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: drm/vkms: Fix use after free and double free on init error CVE-2025-22097 kernel: netsched: ets: Fix double list add in class with netem as child qdisc CVE-2025-37914 kernel: Bluetooth:...

kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a UAF vulnerability in class handling This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue occurs due to a time-of-check/time-of-use condition in hfscchangeclass when...

Linux Distros Unpatched Vulnerability : CVE-2025-37914

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - netsched: ets: Fix double list add in class with netem as child qdisc As described in Gerrard's report 1, there are use cases where a netem child qdisc will mak...

kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a UAF vulnerability in class handling This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue occurs due to a time-of-check/time-of-use condition in hfscchangeclass when...

Linux Distros Unpatched Vulnerability : CVE-2025-37913

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - netsched: qfq: Fix double list add in class with netem as child qdisc As described in Gerrard's report 1, there are use cases where a netem child qdisc will mak...

Linux Distros Unpatched Vulnerability : CVE-2025-37798

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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 fr...

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: 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...

SUSE CVE-2025-38468

In the Linux kernel, the following vulnerability has been resolved: net/sched: Return NULL when htblookupleaf encounters an empty rbtree htblookupleaf has a BUGON that can trigger with the following: tc qdisc del dev lo root tc qdisc add dev lo root handle 1: htb default 1 tc class add dev lo...

kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a UAF vulnerability in class handling This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue occurs due to a time-of-check/time-of-use condition in hfscchangeclass when...

SUSE CVE-2025-38457

In the Linux kernel, the following vulnerability has been resolved: net/sched: Abort tcmodifyqdisc if parent class does not exist Lion's patch 1 revealed an ancient bug in the qdisc API. Whenever a user creates/modifies a qdisc specifying as a parent another qdisc, the qdisc API will, during...

DEBIAN-CVE-2025-38457

In the Linux kernel, the following vulnerability has been resolved: net/sched: Abort tcmodifyqdisc if parent class does not exist Lion's patch 1 revealed an ancient bug in the qdisc API. Whenever a user creates/modifies a qdisc specifying as a parent another qdisc, the qdisc API will, during...

CVE-2025-38457

In the Linux kernel, the following vulnerability has been resolved: net/sched: Abort tcmodifyqdisc if parent class does not exist Lion's patch 1 revealed an ancient bug in the qdisc API. Whenever a user creates/modifies a qdisc specifying as a parent another qdisc, the qdisc API will, during...

AZL-72935 CVE-2025-38457 affecting package kernel for versions less than 5.15.200.1-1

In the Linux kernel, the following vulnerability has been resolved: net/sched: Abort tcmodifyqdisc if parent class does not exist Lion's patch 1 revealed an ancient bug in the qdisc API. Whenever a user creates/modifies a qdisc specifying as a parent another qdisc, the qdisc API will, during...

CVE-2025-38457 net/sched: Abort __tc_modify_qdisc if parent class does not exist

In the Linux kernel, the following vulnerability has been resolved: net/sched: Abort tcmodifyqdisc if parent class does not exist Lion's patch 1 revealed an ancient bug in the qdisc API. Whenever a user creates/modifies a qdisc specifying as a parent another qdisc, the qdisc API will, during...

CVE-2025-38457

CVE-2025-38457 concerns a Linux kernel net/sched bug where grafting a qdisc to a non-existent parent class could cause a failure during qdisc initialization. The fix introduces early validation via qdisc_leaf so that attempting to attach to a non-class parent aborts before qdisc_create. Affected ...

CVE-2025-38457

In the Linux kernel, the following vulnerability has been resolved: net/sched: Abort tcmodifyqdisc if parent class does not exist Lion's patch 1 revealed an ancient bug in the qdisc API. Whenever a user creates/modifies a qdisc specifying as a parent another qdisc, the qdisc API will, during...