Configure Proper Association Policies for INPUT and OUTPUT of iptables

Although you can configure protocols, IP addresses, and port numbers to add policies for packets entering and leaving a server to the INPUT and OUTPUT chains, it is difficult to configure suitable policies using the sport parameter due to complicated situations. For example, a client accesses the...

CVE-2023-53333

CVE-2023-53333 affects the Linux kernel netfilter/conntrack for DCCP. The root cause is that nf_conntrack_dccp_packet() copies the full DCCP header into a stack buffer (via skb_header_pointer) rather than only the basic header, allowing a read past the allocated buffer (OOB read). The vulnerabili...

netfilter: ctnetlink: fix refcount leak on table dump

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The vulnerability of the __nf_conntrack_find_get() function in the Linux kernel’s Netfilter component allows a hacker to induce a service failure.

The vulnerability of the nfconntrackfindget function in the Netfilter component of the Linux operating system is related to the unlimited distribution of resources. Exploiting this vulnerability could allow a attacker to cause a service failure...

netfilter: nf_conntrack: fix crash due to removal of uninitialised entry

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OESA-2025-1964 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: In the Linux kernel, the following vulnerability has been resolved: net/sched: actct: fix ref leak when switching zones When switching zones or network namespaces without doing a ct clear in between, it is now leaking a reference...

OESA-2025-1963 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: In the Linux kernel, the following vulnerability has been resolved: net/sched: actct: fix ref leak when switching zones When switching zones or network namespaces without doing a ct clear in between, it is now leaking a reference...

Linux Distros Unpatched Vulnerability : CVE-2022-49338

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: net/mlx5e: CT: Fix cleanup of CT before cleanup of TC ct rules CT cleanup assumes that all t...

Linux Distros Unpatched Vulnerability : CVE-2023-39197

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An out-of-bounds read vulnerability was found in Netfilter Connection Tracking conntrack in the Linux kernel. This flaw allows a remote user to disclose sensiti...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in Linux kernel that stems from the deletion of uninitialized connection tracking entries, which could lead to a crash...

kernel: net/mlx5e: CT: Fix null-ptr-deref in add rule err flow

A flaw was found in the Linux kernel's Mellanox mlx5 network driver. An uninitialized pointer is improperly accessed within the driver's error-handling path when adding connection tracking rules. A local user can exploit this vulnerability during a rule configuration failure, triggering a null...

Configure Proper Association Policies for INPUT and OUTPUT of iptables

Although you can configure protocols, IP addresses, and port numbers to add policies for packets entering and leaving a server to the INPUT and OUTPUT chains, it is difficult to configure suitable policies using the sport parameter due to complicated situations. For example, a client accesses the...

CVE-2025-21958

In the Linux kernel, the following vulnerability has been resolved: Revert "openvswitch: switch to per-action label counting in conntrack" Currently, ovsctsetlabels is only called for confirmed conntrack entries ct within ovsctcommit. However, if the conntrack entry does not have the labelsext...

kernel: netfilter: nf_conntrack_h323: Add protection for bmp length out of range

A vulnerability was found in the netfilter subsystem of the Linux kernel, specifically in the nfconntrackh323 module. This issue involves inadequate protection for BMP length values, potentially leading to out-of-range conditions...

conntrack-tools bug fix update

An update is available for conntrack-tools. This update affects Rocky Linux 9. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The conntrack-tools packages enable the user to set up a High...

UBUNTU-CVE-2023-52927

In the Linux kernel, the following vulnerability has been resolved: netfilter: allow exp not to be removed in nfctfindexpectation Currently nfconntrackin calling nfctfindexpectation will remove the exp from the hash table. However, in some scenario, we expect the exp not to be removed when the...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from the nfctfindexpectation function not removing exp, which could result in ct's being created that are not...

DEBIAN-CVE-2022-49561

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: re-fetch conntrack after insertion In case the conntrack is clashing, insertion can free skb-nfct and set skb-nfct to the already-confirmed entry. This wasn't found before because the conntrack entry and the...

DEBIAN-CVE-2022-49338

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: CT: Fix cleanup of CT before cleanup of TC ct rules CT cleanup assumes that all tc rules were deleted first, and so is free to delete the CT shared resources e.g the draction fwdaction which is shared for all tuples. B...

UBUNTU-CVE-2022-49561

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: re-fetch conntrack after insertion In case the conntrack is clashing, insertion can free skb-nfct and set skb-nfct to the already-confirmed entry. This wasn't found before because the conntrack entry and the...