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: tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]()

A flaw was found in the Linux kernel's tunnels module. This vulnerability, categorized as a Use-After-Free UAF, arises from improper handling of network header pointers during certain packet processing operations. Specifically, functions responsible for building Internet Control Message Protocol...

kernel: vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu()

A flaw was found in the Linux kernel's Virtual Extensible LAN VXLAN module. This vulnerability occurs because a cached IP header pointer is improperly reused after a Path Maximum Transmission Unit PMTU check. When the packet's head is modified during the PMTU check, the old cached IP header point...

kernel: ipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress()

A flaw was found in the Linux kernel's IPv6 Routing Protocol for Low-Power and Lossy Networks RPL segment routing header SRH decompression function, ipv6rplsrhdecompress. An integer overflow occurs when processing a specially crafted IPv6 packet, causing the header length calculation to truncate...

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: netfilter: flowtable: publish GC-visible tuple last

A flaw was found in the netfilter flowtable component of the Linux kernel. This vulnerability occurs due to a timing issue where the system's garbage collection can free a network flow while it is still being set up. This can lead to a 'use-after-free' condition, where the system attempts to acce...

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: 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: 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: nvme: add missing SRCU grace period in error path

A flaw was found in the NVMe Non-Volatile Memory Express driver of the Linux kernel. The nvmeallocns function's error handling path fails to wait for all SRCU Sleepable Read-Copy Update readers to complete before freeing a namespace structure. This oversight allows a concurrent reader to access a...

kernel: net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink

A flaw was found in the Linux kernel's ip6gre and ip6erspan tunnel drivers. The changelink functions in these drivers do not adequately verify administrative capabilities CAPNETADMIN across different network namespaces. This allows a local attacker, who has CAPNETADMIN in one network namespace bu...

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: 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: ipvs: clear IPv4 options after rebasing tunnel ICMP errors

A flaw was found in the Linux kernel's IP Virtual Server IPVS component. When processing Internet Control Message Protocol ICMP errors for tunneled packets, the system can incorrectly use a stale IPv4 option offset. A remote attacker could exploit this by sending a specially crafted ICMP packet,...

kernel: Kernel SMB client: Double-free vulnerability allows remote denial of service or privilege escalation

A flaw was found in the Linux kernel's Server Message Block SMB client. A double-free vulnerability exists in the SMB2ioctl replay path, where a response buffer can be freed twice under specific error conditions. A malicious or compromised SMB server could exploit this by sending crafted response...

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: NFSD: Fix SECINFO_NO_NAME decode error cleanup

A flaw was found in the Linux kernel's Network File System Daemon NFSD. The nfsd4decodesecinfononame function does not properly initialize a pointer sinexp before processing an incoming data stream. If the data stream is malformed or truncated, the uninitialized pointer can retain stale data from...

kernel: igc: set tx buffer type for SMD frames

A flaw was found in the Linux kernel's igc network driver. The igcfpeinitsmdframe function, responsible for initializing transmit TX buffer fields for Stream-based Data SMD frames, does not correctly set the buffer type. This can result in stale XDP eXpress Data Path or XSK AFXDP socket types...

kernel: nfsd: defer vfree of compound ops to fix rpc_status UAF

A flaw was found in the nfsd component of the Linux kernel. This vulnerability, a use-after-free, occurs when a specific memory buffer is prematurely released while another process is still trying to access it. This timing issue can lead to memory corruption. This could result in a system crash...

kernel: nfsd: revoke copy-notify stateids before dropping their reference

A flaw was found in the Linux kernel's Network File System Daemon nfsd. This vulnerability arises from improper handling of "copy-notify stateids" during their revocation. When a stateid's reference is dropped without unlinking it, the memory can be freed while still in use by a reader, leading t...