CVE-2026-23134

The event CVE-2026-23134 pertains to the Linux kernel slab/kmalloc_nolock() context checks on PREEMPT_RT. On PREEMPT_RT kernels, local_lock is a sleeping lock; when a BPF program runs from a tracepoint with preemption disabled, kmalloc_nolock() may call local_lock_irqsave() and attempt to acquire...

CVE-2026-23134 slab: fix kmalloc_nolock() context check for PREEMPT_RT

In the Linux kernel, the following vulnerability has been resolved: slab: fix kmallocnolock context check for PREEMPTRT On PREEMPTRT kernels, locallock becomes a sleeping lock. The current check in kmallocnolock only verifies we're not in NMI or hard IRQ context, but misses the case where...

PT-2026-8129

In the Linux kernel, the following vulnerability has been resolved: slab: fix kmalloc nolock context check for PREEMPT RT On PREEMPT RT kernels, local lock becomes a sleeping lock. The current check in kmalloc nolock only verifies we're not in NMI or hard IRQ context, but misses the case where...

Rethinking Latency Denial-Of-Service: Attacking the LLM Serving Framework, Not the Model

Large Language Models face an emerging and critical threat known as latency attacks. Because LLM inference is inherently expensive, even modest slowdowns can translate into substantial operating costs and severe availability risks. Recently, a growing body of research has focused on algorithmic...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: Input: gpio-keys – fix a sleep while atomic with PREEMPTRT. When PREEMPTRT is enabled, the gpiokeysirqtimer callback runs in the hardirq context. However, the inputevent function takes a spinlock, which is not allowed in that...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: arm64/fpsimd: Discarding stale CPU state when handling SME traps The logic for handling SME traps improperly manipulates the saved FPSIMD/SVE/SME state. A race condition can occur when the SME trap handler is preempted before and...

Azure Linux 3.0 Security Update: kernel (CVE-2025-38170)

"The version of kernel installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-38170 advisory. - In the Linux kernel, the following vulnerability has been resolved: arm64/fpsimd: Discard stale CPU state...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-004433)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004433 advisory. fpregsstatevalid in arch/x86/include/asm/fpu/internal.h in the Linux kernel before 5.4.2, when GCC 9 is used, allows context-dependent attackers to cause a denial of...

CVE-2025-71124

In the Linux kernel, the following vulnerability has been resolved: drm/msm/a6xx: move preemptpreparepostamble after error check Move the call to preemptpreparepostamble after verifying that preemptpostambleptr is valid. If preemptpostambleptr is NULL, dereferencing it in preemptpreparepostamble...

CVE-2025-71132

In the Linux kernel, the following vulnerability has been resolved: smc91x: fix broken irq-context in PREEMPTRT When smc91x.c is built with PREEMPTRT, the following splat occurs in FVPRevC: 13.055000 smc91x LNRO0003:00 eth0: link up, 10Mbps, half-duplex, lpa 0x0000 13.062137 BUG: workqueue leaked...

UBUNTU-CVE-2025-71104

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer When advancing the target expiration for the guest's APIC timer in periodic mode, set the expiration to "now" if the target expiration is in the past...

CVE-2025-71132

CVE-2025-71132 affects the Linux kernel’s smc91x driver when built with PREEMPT_RT, causing a workqueue/RCU leak due to smc_special_trylock() disabling IRQs without restoring them. The root cause is that smc_special_unlock() uses spin_unlock_irqrestore() but cannot invoke rcu_read_unlock() via __...

CVE-2025-71132

In the Linux kernel, the following vulnerability has been resolved: smc91x: fix broken irq-context in PREEMPTRT When smc91x.c is built with PREEMPTRT, the following splat occurs in FVPRevC: 13.055000 smc91x LNRO0003:00 eth0: link up, 10Mbps, half-duplex, lpa 0x0000 13.062137 BUG: workqueue leaked...

CVE-2025-71104 KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer When advancing the target expiration for the guest's APIC timer in periodic mode, set the expiration to "now" if the target expiration is in the past...

CVE-2025-71104 KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer When advancing the target expiration for the guest's APIC timer in periodic mode, set the expiration to "now" if the target expiration is in the past...

Linux Distros Unpatched Vulnerability : CVE-2025-71132

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In the Linux kernel, the following vulnerability has been resolved: smc91x: fix broken irq-context in PREEMPTRT When smc91x.c is built with PREEMPTRT, the...

CVE-2025-71080

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix a BUG in rt6getpcpuroute under PREEMPTRT On PREEMPTRT kernels, after rt6getpcpuroute returns NULL, the current task can be preempted. Another task running on the same CPU may then execute rt6makepcpuroute and successful...

PT-2026-27739

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 7.0.0-rc1lblk+ 84 Description The Linux kernel's blktrace component contains an issue where this cpu read and this cpu write are used in a preemptible context. Specifically, tracing record cmdline utilizes these...

SUSE CVE-2023-54173

In the Linux kernel, the following vulnerability has been resolved: bpf: Disable preemption in bpfeventoutput We received report 1 of kernel crash, which is caused by using nesting protection without disabled preemption. The bpfeventoutput can be called by programs executed by bpfprogrunarraycg...

SUSE CVE-2023-54267

In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: Rework lppacasharedproc to avoid DEBUGPREEMPT lppacasharedproc takes a pointer to the lppaca which is typically accessed through getlppaca. With DEBUGPREEMPT enabled, this leads to checking if preemption is...