kernel: nvme/ioctl: check SUBMIT_IO with nvme_cmd_allowed()

A flaw was found in the Linux kernel's NVMe Non-Volatile Memory Express input/output control ioctl handling. An unprivileged local user could exploit this vulnerability by bypassing access checks in the NVMEIOCTLSUBMITIO function. This allows them to perform unauthorized I/O operations on a...

kernel: Bluetooth: hci_uart: fix UAFs and race conditions in close and init paths

A flaw was found in the Linux kernel's Bluetooth hciuart component. Lifecycle management issues, including Use-After-Free UAF and race conditions, were identified during the closing and initialization paths. These issues can lead to the dereferencing of freed memory, potentially causing system...

kernel: KVM: arm64: Reassign nested_mmus array behind mmu_lock

A flaw was found in the Linux kernel's KVM Kernel-based Virtual Machine for arm64 architectures. An issue in the reallocation of the nestedmmus array allows a process to access freed memory. This memory corruption vulnerability could enable a local attacker to escalate privileges or cause a denia...

kernel: thermal: core: Fix thermal zone device registration error path

A flaw was found in the Linux kernel's thermal core subsystem. When thermalzonedeviceregisterwithtrips fails during device registration, it does not properly wait for the thermal zone device's removal completion. This can lead to the premature freeing of the device's memory, creating a...

kernel: gfs2: Fix slab-use-after-free in qd_put

A flaw was found in the Linux kernel's GFS2 file system. During filesystem shutdown, quota data objects were freed without being properly removed from the Least Recently Used LRU list. This oversight could lead to a use-after-free vulnerability, where the system attempts to access memory that has...

kernel: tls: Use __sk_dst_get() and dst_dev_rcu() in get_netdev_for_sock()

A flaw was found in the Linux kernel’s TLS implementation net/tls/tlsdevice.c. The function getnetdevforsock is invoked during setsockopt, which is not executed under RCU Read-Copy-Update protection. It previously used skdstgetsk-dev, which can lead to a use-after-free UAF if the sk’s destination...

kernel: ipv6: add NULL checks for idev in SRv6 paths

A flaw was found in the Linux kernel. Missing null pointer checks in the IPv6 Segment Routing SRv6 implementation, specifically within the seg6hmacvalidateskb and ipv6srhrcv functions, can occur when an IPv6 device lacks proper configuration. This oversight may allow an attacker to trigger a null...

kernel: gfs2: add some missing log locking

A flaw was found in the Linux kernel's Global File System 2 GFS2 component. The gfs2logd function, responsible for log flushing, calls several log flushing functions without holding the required lock. This omission allows concurrent transactions to access shared resources without proper exclusion...

kernel: netfilter: nf_conntrack_sip: don't use simple_strtoul

A flaw was found in the Linux kernel's netfilter SIP Session Initiation Protocol connection tracking module. This vulnerability, caused by unsafe port parsing, allows a remote attacker to send specially crafted malformed packets. Such packets could lead to excessive resource consumption,...

kernel: netfilter: nf_log: validate MAC header was set before dumping it

A flaw was found in the Linux kernel's netfilter logging component. This vulnerability occurs because the system does not properly check if a network packet's Media Access Control MAC header is valid before attempting to log it. A local attacker could send a specially crafted network packet,...

kernel: ipv6: validate extension header length before copying to cmsg

A flaw was found in the Linux kernel's IPv6 networking stack. An unprivileged local user could exploit a vulnerability in how IPv6 extension header lengths are handled. By manipulating these headers using nftables, an attacker can trigger an out-of-bounds read, leading to information disclosure...

kernel: vxlan: require CAP_NET_ADMIN in the device netns for changelink

A flaw was found in the Linux kernel's VXLAN Virtual Extensible LAN implementation. A local attacker, with CAPNETADMIN network administration capability in one network namespace, could exploit an incorrect privilege check in the rtnl changelink path. This allows the attacker to modify the...

kernel: netfilter: nf_queue: pin bridge device while NFQUEUE holds fake dst

A flaw was found in the Linux kernel's netfilter component, specifically within the nfqueue functionality. When a bridged packet is queued to NFQUEUE, it can retain a reference to a bridge's private fake destination 'dst' even after the bridge teardown has begun. This can lead to a use-after-free...

kernel: nvme-tcp: reject a read that transferred too few bytes

A flaw was found in the NVMe-TCP implementation of the Linux kernel. This vulnerability occurs when the system completes a data read request even if the connected controller transfers fewer bytes than expected. As a result, the user application receives a mix of legitimate and stale data,...

kernel: KVM: s390: vsie: zero stale crypto bits

A flaw was found in the Linux kernel's KVM s390 Virtual Shared Inter-Partition Emulation VSIE component. When shadowing crypto access bits from a format0 apcb, stale crypto bits were not properly cleared. This oversight could allow a nested guest to potentially access a device that should no long...

CVE-2026-31431-poc

Wrapper PoC del Comando Copy Fail Un piccolo wrapper proof-of-concept modificato per Copy Fail / CVE-2026-31431 che consente di passare un comando personalizzato dal terminale invece di avviare sempre una shell root interattiva, così da poter essere eseguito in un ambiente non interattivo come un...

copyfail-rs

copyfail-rs Implementazione in Rust di CVE-2026-31431 Copy Fail — una primitiva di scrittura nella page cache del kernel Linux tramite AFALG splice. 中文文档 / Chinese README CVE-2026-31431 L'implementazione algifaead del kernel Linux consente a un utente non privilegiato di scrivere dati arbitrari...

Dirty-Frag-Analysis

Analisi Tecnica Approfondita di Dirty Frag CVE-2026-43284 xfrm-ESP / CVE-2026-43500 RxRPC Vulnerabilità di escalation dei privilegi nel kernel Linux — Reverse engineering del PoC · Analisi dello shellcode · Principi della patch · Script di rilevamento Panoramica della Vulnerabilità Dirty Frag...

CVE-2026-31431

CVE-2026-31431 - Copy Fail PoC Bildungs-PoC für CVE-2026-31431 , auch bekannt als Copy Fail , eine lokale Privilege-Escalation-Schwachstelle im Linux-Kernel, die die kryptografische Schnittstelle AFALG / algifaead betrifft. !WARNING Dieses Repository wird ausschließlich für Bildungs-,...

CVE-2026-31431

Autore: 0xShe Lingua / 语言 English: https://github.com/0xShe/CVE-2026-31431/blob/main/README.md 中文: https://github.com/0xShe/CVE-2026-31431/blob/main/README-CN.md Guida allo strumento di escalation dei privilegi del kernel CVE-2026-31431 0x01 Avvio rapido Alcuni ambienti target non hanno Python...