Cisco IOS, IOS XE, Secure Firewall Adaptive Security Appliance, and Secure Firewall Threat Defense Software IKEv2 Denial of Service Vulnerability

A vulnerability in the Internet Key Exchange version 2 IKEv2 feature of Cisco IOS Software, Cisco IOS XE Software, Cisco Secure Firewall Adaptive Security Appliance ASA Software, and Cisco Secure Firewall Threat Defense FTD Software could allow an unauthenticated, remote attacker to trigger a...

kernel: Linux kernel: Use-after-free in BPF sockmap can lead to denial of service and privilege escalation

A flaw was found in the Linux kernel's BPF Berkeley Packet Filter sockmap subsystem. A race condition exists where the sksocket is not properly locked or referenced during the skbsendsock function call, allowing for a use-after-free vulnerability. This can be exploited by a local attacker, leadin...

CVE-2026-23391

A flaw was found in the Linux kernel’s netfilter subsystem. When a netfilter template rule is removed, packets that are still queued and refer to the removed template are not properly dropped. This improper handling of packets could lead to resource exhaustion or unexpected system behavior,...

CVE-2026-23383

In the Linux kernel, the following vulnerability has been resolved: bpf, arm64: Force 8-byte alignment for JIT buffer to prevent atomic tearing struct bpfplt contains a u64 target field. Currently, the BPF JIT allocator requests an alignment of 4 bytes sizeofu32 for the JIT buffer. Because the ba...

UBUNTU-CVE-2026-23284

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: mtkethsoc: Reset prog ptr to oldprog in case of error in mtkxdpsetup Reset eBPF program pointer to oldprog and do not decrease its ref-count if mtkopen routine in mtkxdpsetup fails...

UBUNTU-CVE-2026-23383

In the Linux kernel, the following vulnerability has been resolved: bpf, arm64: Force 8-byte alignment for JIT buffer to prevent atomic tearing struct bpfplt contains a u64 target field. Currently, the BPF JIT allocator requests an alignment of 4 bytes sizeofu32 for the JIT buffer. Because the ba...

CVE-2026-23391 netfilter: xt_CT: drop pending enqueued packets on template removal

In the Linux kernel, the following vulnerability has been resolved: netfilter: xtCT: drop pending enqueued packets on template removal Templates refer to objects that can go away while packets are sitting in nfqueue refer to: - helper, this can be an issue on module removal. - timeout policy,...

CVE-2026-23391

In the Linux kernel, the following vulnerability has been resolved: netfilter: xtCT: drop pending enqueued packets on template removal Templates refer to objects that can go away while packets are sitting in nfqueue refer to: - helper, this can be an issue on module removal. - timeout policy,...

CVE-2026-23383

CVE-2026-23383 affects the Linux kernel’s BPF JIT path on arm64. The root cause was 4-byte alignment in bpf_jit_binary_pack_alloc() causing the JIT buffer’s base to be only 4-byte aligned, which could misalign the 64-bit target field in struct bpf_plt. Consequences include UBSAN misaligned-access...

CVE-2026-23359 bpf: Fix stack-out-of-bounds write in devmap

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix stack-out-of-bounds write in devmap getupperifindexes iterates over all upper devices and writes their indices into an array without checking bounds. Also the callers assume that the max number of upper devices is...

CVE-2026-23359

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix stack-out-of-bounds write in devmap getupperifindexes iterates over all upper devices and writes their indices into an array without checking bounds. Also the callers assume that the max number of upper devices is...

CVE-2026-23342

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix race in cpumap on PREEMPTRT On PREEMPTRT kernels, the per-CPU xdpbulkqueue bq can be accessed concurrently by multiple preemptible tasks on the same CPU. The original code assumes bqenqueue and cpumapflush run atomically...

CVE-2026-23319

Summary (CVE-2026-23319) : In the Linux kernel, a use-after-free (UAF) vulnerability in bpf_trampoline_link_cgroup_shim was fixed. The root cause was a race window where, after bpf_link_put reduces the refcount of shim_link->link.link to zero, the resource is considered released but may still ...

CVE-2026-23294

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix race in devmap on PREEMPTRT On PREEMPTRT kernels, the per-CPU xdpdevbulkqueue bq can be accessed concurrently by multiple preemptible tasks on the same CPU. The original code assumes bqenqueue and devflush run atomically...

kernel: RDMA/rxe: Fix incomplete state save in rxe_requester

An incorrect state restoration flaw was found in the Linux kernel's RDMA rxe soft-RoCE driver in the requester packet transmission logic. A local user with access to RDMA devices can trigger this issue when network layer packet drops occur during RDMA send operations, causing the work queue eleme...

SUSE CVE-2026-33151

Socket.IO is an open source, real-time, bidirectional, event-based, communication framework. Prior to versions 3.3.5, 3.4.4, and 4.2.6, a specially crafted Socket.IO packet can make the server wait for a large number of binary attachments and buffer them, which can be exploited to make the server...

dnsmasq -- multiple vulnerabilities

Simon Kelley reports: Today, 11th May 2026 CERT is releasing a set of six CVEs for serious security vulnerabilities in dnsmasq. These are all long-standing bugs which apply to pretty much all non-ancient versions. Christopher Cullen and Molly Jaconski write, in Vulnerability Note VU471747:...

FreeBSD Security Advisory - FreeBSD-SA-26:09.pf

FreeBSD Security Advisory - pf silently ignores certain rules. A regression in the way hashes were calculated caused rules containing the address range syntax x.x.x.x - y.y.y.y that only differ in the address ranges involved to be silently dropped as duplicates. Only the first of such rules is...

PT-2026-27707

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix race in cpumap on PREEMPT RT On PREEMPT RT kernels, the per-CPU xdp bulk queue bq can be accessed concurrently by multiple preemptible tasks on the same CPU. The original code assumes bq enqueue and cpu map flush run...

The vulnerability of the bpf_prog_attach_check_attach_type() function in the kernel/bpf/syscall.c module, which is part of the Linux operating system’s BPF interpreter support, allows a malicious actor to cause a service failure.

The vulnerability of the bpfprogattachcheckattachtype function in the kernel/bpf/syscall.c module, which is part of the BPF interpreter support for Linux operating systems, is related to incorrect initialization of resources. Exploiting this vulnerability could allow an attacker to cause a servic...