Linux Kernel Security Vulnerabilities

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 possible modification of the cb field of the skb when the xfrm device uses the sfb type qdisc, which could...

kernel: net/sched: sch_qfq: Fix race condition on qfq_aggregate

In the Linux kernel, the following vulnerability has been resolved: net/sched: schqfq: Fix race condition on qfqaggregate A race condition can occur when 'agg' is modified in qfqchangeagg called during qfqenqueue while other threads access it concurrently. For example, qfqdumpclass may trigger a...

RHEL 8 : kernel (RHSA-2025:17009)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:17009 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: drm/vkms: Fix use after free...

SUSE-SU-2025:03359-1 Security update for the Linux Kernel (Live Patch 50 for SLE 15 SP3)

This update for the Linux Kernel 5.3.18-15030059182 fixes several issues. The following security issues were fixed: - CVE-2025-38177: schhfsc: make hfscqlennotify idempotent bsc1246356. - CVE-2025-38181: calipso: Fix null-ptr-deref in calipsoreqset,delattr bsc1246001. - CVE-2025-38498:...

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...

CVE-2023-53442

In the Linux kernel, the following vulnerability has been resolved: ice: Block switchdev mode when ADQ is active and vice versa ADQ and switchdev are not supported simultaneously. Enabling both at the same time can result in nullptr dereference. To prevent this, check if ADQ is active when changi...

CVE-2023-53442 ice: Block switchdev mode when ADQ is active and vice versa

In the Linux kernel, the following vulnerability has been resolved: ice: Block switchdev mode when ADQ is active and vice versa ADQ and switchdev are not supported simultaneously. Enabling both at the same time can result in nullptr dereference. To prevent this, check if ADQ is active when changi...

Important: kernel

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: idle: Check acpifetchacpidev return value CVE-2022-50327 In the Linux kernel, the following vulnerability has been resolved: bpf: Fix helper writes to read-only maps CVE-2024-49861 In the Linux...

UBUNTU-CVE-2022-50329

In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix uaf for bfqq in bfqexiticqbfqq Commit 64dc8c732f5c "block, bfq: fix possible uaf for 'bfqq-bic'" will access 'bic-bfqq' in bicsetbfqq, however, bfqexiticqbfqq can free bfqq first, and then call bicsetbfqq, which...

SUSE CVE-2025-39766

In the Linux kernel, the following vulnerability has been resolved: net/sched: Make cakeenqueue return NETXMITCN when past bufferlimit The following setup can trigger a WARNING in htbactivate due to the condition: !cl-leaf.q-q.qlen tc qdisc del dev lo root tc qdisc add dev lo root handle 1: htb...

Security update for kernel-livepatch-MICRO-6-0-RT_Update_3

This update for kernel-livepatch-MICRO-6-0-RTUpdate3 fixes the following issues: CVE-2025-38087: net/sched: fix use-after-free in tapriodevnotifier bsc1245505 CVE-2025-21999: proc: fix UAF in procgetinode bsc1242579 CVE-2025-38001: netsched: hfsc: Address reentrant enqueue adding class to eltree...

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 CVE-2025-39682

In the Linux kernel, the following vulnerability has been resolved: tls: fix handling of zero-length records on the rxlist Each recvmsg call must process either - only contiguous DATA records any number of them - one non-DATA record If the next record has different type than what has already been...

Linux Distros Unpatched Vulnerability : CVE-2025-39677

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net/sched: Fix backlog accounting in qdiscdequeueinternal This issue applies for the following qdiscs: hhf, fq, fqcodel, and fqpie, and occurs in their change...

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...

Oracle Linux 8 : kernel (ELSA-2025-15008)

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2025-15008 advisory. - scsi: lpfc: Use memcpy for BIOS version Ewan D. Milne RHEL-105927 CVE-2025-38332 - RDMA/iwcm: Fix use-after-free of work objects after cmid...

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...

kernel: net_sched: hfsc: Address reentrant enqueue adding class to eltree twice

A use-after-free UAF vulnerability, which also presents a potential infinite loop condition, has been resolved in the Linux kernel. This flaw affects the HFSC Hierarchical Fair Service Curve queuing discipline when it is used in conjunction with NETEM Network Emulation. A malicious user could...

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...