CVE-2026-23231

CVE-2026-23231 affects the Linux kernel nf_tables code. The root cause is a use-after-free in nf_tables_addchain(), where a new chain is published to a table via list_add_tail_rcu() before hooks are registered; on failure the error path frees the chain without an RCU grace period, creating use-af...

CVE-2026-23231 netfilter: nf_tables: fix use-after-free in nf_tables_addchain()

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: fix use-after-free in nftablesaddchain nftablesaddchain publishes the chain to table-chains via listaddtailrcu in nftchainadd before registering hooks. If nftablesregisterhook then fails, the error path calls...

The vulnerability of the rcu_assign_sk_user_data_nocopy() macro definition in the include/net/sock.h file, which is part of the networking function support in the Linux kernel, allows a hacker to cause a service failure.

The vulnerability of the rcuassignskuserdatanocopy macro definition in the include/net/sock.h file, which is part of the Linux kernel’s networking support functions, is related to errors during the update of the reference counters. Exploiting this vulnerability could allow an attacker to cause a...

SUSE CVE-2026-23138

In the Linux kernel, the following vulnerability has been resolved: tracing: Add recursion protection in kernel stack trace recording A bug was reported about an infinite recursion caused by tracing the rcu events with the kernel stack trace trigger enabled. The stack trace code called back into...

kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match()

A flaw was found in the Linux kernel’s SMC Shared Memory Communication module: in smcclcprfxmatch, the function is called from smclistenwork without proper RCU or RTNL protection. The code previously used skdstgetsk-dev, which can lead to a use-after-free UAF condition if the sk’s destination is...

SUSE CVE-2026-23169

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix race in mptcppmnlflushaddrsdoit syzbot and Eulgyu Kim reported crashes in mptcppmnlgetlocalid and/or mptcppmnlisbackup Root cause is listspliceinit in mptcppmnlflushaddrsdoit which is not RCU ready. listspliceinitrcu c...

CVE-2026-23138

In the Linux kernel, the following vulnerability has been resolved: tracing: Add recursion protection in kernel stack trace recording A bug was reported about an infinite recursion caused by tracing the rcu events with the kernel stack trace trigger enabled. The stack trace code called back into...

CVE-2026-23169

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix race in mptcppmnlflushaddrsdoit syzbot and Eulgyu Kim reported crashes in mptcppmnlgetlocalid and/or mptcppmnlisbackup Root cause is listspliceinit in mptcppmnlflushaddrsdoit which is not RCU ready. listspliceinitrcu c...

UBUNTU-CVE-2026-23169

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix race in mptcppmnlflushaddrsdoit syzbot and Eulgyu Kim reported crashes in mptcppmnlgetlocalid and/or mptcppmnlisbackup Root cause is listspliceinit in mptcppmnlflushaddrsdoit which is not RCU ready. listspliceinitrcu c...

CVE-2026-23169

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix race in mptcppmnlflushaddrsdoit syzbot and Eulgyu Kim reported crashes in mptcppmnlgetlocalid and/or mptcppmnlisbackup Root cause is listspliceinit in mptcppmnlflushaddrsdoit which is not RCU ready. listspliceinitrcu c...

CVE-2026-23138

In CVE-2026-23138, the Linux kernel fixes an infinite recursion bug triggered when tracing the RCU events with the stack-trace trigger enabled. The patch expands ftrace recursion protection by adding a set of bits to protect events from recursion across contexts (normal, softirq, interrupt, and N...

EUVD-2026-5899

In the Linux kernel, the following vulnerability has been resolved: tracing: Add recursion protection in kernel stack trace recording A bug was reported about an infinite recursion caused by tracing the rcu events with the kernel stack trace trigger enabled. The stack trace code called back into...

Linux Distros Unpatched Vulnerability : CVE-2026-23138

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - tracing: Add recursion protection in kernel stack trace recording A bug was reported about an infinite recursion caused by tracing the rcu events with the kerne...

kernel: net: use dst_dev_rcu() in sk_setup_caps()

In the Linux kernel, the following vulnerability has been resolved: net: use dstdevrcu in sksetupcaps Use RCU to protect accesses to dst-dev from sksetupcaps and skdstgsomaxsize. Also use dstdevrcu in ip6dstmtumaybeforward, and ipdstmtumaybeforward. ip4dsthoplimit can use dstdevnetrcu...

AlmaLinux 8 : kernel-rt (ALSA-2026:2378)

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:2378 advisory. kernel: vsock/vmci: Clear the vmci transport packet properly when initializing it CVE-2025-38403 kernel: net: use dstdevrcu in sksetupcaps CVE-2025-40170...

kernel: vrf: use RCU protection in l3mdev_l3_out()

A use-after-free vulnerability was found in the Linux kernel. l3mdevl3out can be called without RCU being held, causing damage to the availability of the system...

kernel: ipv6: use RCU in ip6_xmit()

A use-after-free flaw was found in ip6autoflowlabel in the Linux kernel's net/ipv6/ip6output.c code. In this flaw an attacker can cause a denial of service DoS attack...

kernel: net: use dst_dev_rcu() in sk_setup_caps()

In the Linux kernel, the following vulnerability has been resolved: net: use dstdevrcu in sksetupcaps Use RCU to protect accesses to dst-dev from sksetupcaps and skdstgsomaxsize. Also use dstdevrcu in ip6dstmtumaybeforward, and ipdstmtumaybeforward. ip4dsthoplimit can use dstdevnetrcu...

Important: kernel

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: tcpmetrics: use dstdevnetrcu CVE-2025-40075 Affected Packages: kernel Note: This advisory is applicable to Amazon Linux 2 - Kernel-5.10 Extra. Visit this page to learn more about Amazon Linux 2 AL2 Extras and this...

PT-2026-46022

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A flaw exists in the procfs component of the Linux kernel within the do task stat function. When reading the '/proc/pid/stat' endpoint, the system accesses the real parent variable witho...