kernel: rcu: Fix __this_cpu_read() lockdep warning in rcu_force_quiescent_state()

A lockdep warning was found in the Linux kernel's RCU subsystem. The rcuforcequiescentstate function incorrectly uses thiscpuread in preemptible code context. This macro requires preemption to be disabled, but the code can be called from preemptible context during rcutorture testing, triggering a...

PT-2025-18885 · Linux +2 · Linux Kernel +2

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: A vulnerability in the Linux kernel has been resolved. The issue arises when tcp make synack is called from process context, potentially leading to the use of this cpu add in preemptib...

kernel: netfilter: flowtable_offload: fix using __this_cpu_add in preemptible

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtableoffload: fix using thiscpuadd in preemptible flowoffloadqueuework can be called in workqueue without bh disabled, like the call trace showed in my actct testing, calling NFFLOWTABLESTATINC there would cause a...

kernel: netfilter: conntrack: fix using __this_cpu_add in preemptible

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: fix using thiscpuadd in preemptible Currently in nfconntrackhashcheckinsert, when it fails in nfctextvalidpre/post, NFCTSTATINC will be called in the preemptible context, a call trace can be triggered: BUG:...

PT-2024-11839 · Linux +1 · Linux Kernel +1

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: A vulnerability has been resolved in the Linux kernel related to the netfilter conntrack module. The issue occurs when nf conntrack hash check insert fails in nf ct ext valid pre/post,...

PT-2023-33112 · Linux · Linux Kernel

Name of the Vulnerable Software and Affected Versions: Linux Kernel versions prior to v6.0.13 Description: The issue is related to the use of this cpu add in preemptible contexts within the netfilter conntrack component. The actual impact and potential for attacks have not been fully proven...

PT-2023-33114 · Linux · Linux Kernel

Name of the Vulnerable Software and Affected Versions: Linux Kernel versions prior to v6.0.13 Description: The issue is related to the use of this cpu add in preemptible context in flowtable offload in netfilter. The actual impact and attack plausibility have not yet been proven. Recommendations:...

PT-2024-11841

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A vulnerability in the Linux kernel has been resolved, related to the netfilter: flowtable offload. The issue arises when flow offload queue work is called in a workqueue without bh...

kernel: scsi: lpfc: Fix call trace observed during I/O with CMF enabled

A vulnerability has been identified in the lpfc module within the Linux kernel. This flaw occurs because the driver attempts to access per-CPU data from a preemptible context using an incorrect function. This improper handling of critical data can lead to system instability and result in a...

kernel: scsi: lpfc: Fix call trace observed during I/O with CMF enabled

A vulnerability has been identified in the lpfc module within the Linux kernel. This flaw occurs because the driver attempts to access per-CPU data from a preemptible context using an incorrect function. This improper handling of critical data can lead to system instability and result in a...

Important: kernel-rt security and bug fix update

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fixes: kernel: a use-after-free in clsroute filter implementation may lead to privilege escalation CVE-2022-2588 kernel: information leak in...

Important: Red Hat Security Advisory: kernel-rt security and bug fix update

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.4 Extended Update Support. 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 available f...

GSD-2022-1005689 RISC-V: kexec: Fixup use of smp_processor_id() in preemptible context

RISC-V: kexec: Fixup use of smpprocessorid in preemptible context This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.61 by commit...

GSD-2022-1005370 RISC-V: kexec: Fixup use of smp_processor_id() in preemptible context

RISC-V: kexec: Fixup use of smpprocessorid in preemptible context This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.19.2 by commit...

kernel: scsi: target: core: Avoid smp_processor_id() in preemptible code

In the Linux kernel, the following vulnerability has been resolved: scsi: target: core: Avoid smpprocessorid in preemptible code The BUG message "BUG: using smpprocessorid in preemptible 00000000 code" was observed for TCMU devices with kernel config DEBUGPREEMPT. The message was observed when...

UVI-2021-1000569 scsi: target: core: Avoid smp_processor_id() in preemptible code

scsi: target: core: Avoid smpprocessorid in preemptible code This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.12.9 by commit...

Scalable Fuzzing Infrastructure: ClusterFuzz

ClusterFuzz is a scalable fuzzing infrastructure which finds security and stability issues in software. It is used by Google for fuzzing the Chrome Browser, and serves as the fuzzing backend for OSS-Fuzz . ClusterFuzz provides many features which help seamlessly integrate fuzzing into a software...

Network Time Protocol Crypto-NAK Preemptible Association Denial of Service Vulnerability(CVE-2016-1547)

SUMMARY An off-path attacker can cause a preemptible client association to be demobilized by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled. Furthermore, if the attacker keeps sending cryp...

CVE-2016-1547

CVE-2016-1547 describes a denial-of-service vulnerability in ntpd where handling of crypto NAK packets can demobilize a preemptable client association. An off-path attacker can spoof a peer’s source and force the victim to drop synchronization, even with authentication enabled. The issue affects ...

UBUNTU-CVE-2016-1547

An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if...