Unity Linux 20.1050e / 20.1070e Security Update: kernel (UTSA-2026-011386)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-011386 advisory. In the Linux kernel, the following vulnerability has been resolved: inet: inetdefrag: prevent sk release while still in use iplocalout and other functions can pass...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013275)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013275 advisory. net/netfilter/nfconntrackstandalone.c in the Linux kernel before 5.12.2 allows observation of changes in any net namespace because these changes are leaked into all...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-007263)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-007263 advisory. In the Linux kernel, the following vulnerability has been resolved: inet: inetdefrag: prevent sk release while still in use iplocalout and other functions can pass...

netfilter: nf_conntrack_sip: fix use of uninitialized rtp_addr in process_sdp

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netfilter: nf_conntrack_expect: use expect->helper

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CVE-2026-31427

A flaw was found in the Linux kernel's netfilter subsystem, specifically within the nfconntracksip module. This vulnerability occurs in the processsdp function when the rtpaddr variable is used without proper initialization if the Session Description Protocol SDP body lacks recognized media types...

CVE-2026-31427

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntracksip: fix use of uninitialized rtpaddr in processsdp processsdp declares union nfinetaddr rtpaddr on the stack and passes it to the nfnatsip sdpsession hook after walking the SDP media descriptions. However...

UBUNTU-CVE-2026-31427

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntracksip: fix use of uninitialized rtpaddr in processsdp processsdp declares union nfinetaddr rtpaddr on the stack and passes it to the nfnatsip sdpsession hook after walking the SDP media descriptions. However...

CVE-2026-31427

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntracksip: fix use of uninitialized rtpaddr in processsdp processsdp declares union nfinetaddr rtpaddr on the stack and passes it to the nfnatsip sdpsession hook after walking the SDP media descriptions. However...

CVE-2026-31414

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntrackexpect: use expect-helper Use expect-helper in ctnetlink and /proc to dump the helper name. Using nfcthelp without holding a reference to the master conntrack is unsafe. Use exp-master-helper in ctnetlink pa...

CVE-2026-31414

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntrackexpect: use expect-helper Use expect-helper in ctnetlink and /proc to dump the helper name. Using nfcthelp without holding a reference to the master conntrack is unsafe. Use exp-master-helper in ctnetlink pa...

ROS-20260407-73-0015

A vulnerability in the nfconntracknetlink.c component of the Linux operating system kernel is related to errors in updating the link counter. Exploitation of the vulnerability allows an attacker to cause a denial of service...

UBUNTU-CVE-2026-31407

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: add missing netlink policy validations Hyunwoo Kim reports out-of-bounds access in sctp and ctnetlink. These attributes are used by the kernel without any validation. Extend the netlink policies accordingly...

Invisible Adversaries: A Systematic Study of Session Manipulation Attacks on VPNs

Virtual Private Networks VPNs are widely used for censorship evasion and traffic protection. VPN users expect to be provided with adequate security protection, and at the same time not be affected by other users connected to the same VPN server, which can be illustrated as the non-interference...

EUVD-2026-18712

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntrackh323: fix OOB read in decodeint CONS case In decodeint, the CONS case calls getbitsbs, 2 to read a length value, then calls getuintbs, len without checking that len bytes remain in the buffer. The existing...

CVE-2026-23456

A flaw was found in the Linux kernel's netfilter H.323 connection tracking module. A remote attacker could exploit this vulnerability by sending a specially crafted H.323/RAS H.323 Registration, Admission, and Status packet. The system's processing of these packets could lead to an out-of-bounds...

UBUNTU-CVE-2026-23455

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntrackh323: check for zero length in DecodeQ931 In DecodeQ931, the UserUserIE code path reads a 16-bit length from the packet, then decrements it by 1 to skip the protocol discriminator byte before passing it to...

UBUNTU-CVE-2026-23456

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntrackh323: fix OOB read in decodeint CONS case In decodeint, the CONS case calls getbitsbs, 2 to read a length value, then calls getuintbs, len without checking that len bytes remain in the buffer. The existing...

netfilter: xt_CT: drop pending enqueued packets on template removal

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PT-2026-34401

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the netfilter component, specifically within nf conntrack expect, where expectations residing in other network namespaces netns were not properly skipped when accessed...