CVE-2026-53349 netfilter: nf_conntrack: destroy stale expectfn expectations on unregister

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntrack: destroy stale expectfn expectations on unregister NAT helpers such as nfnath323 store a raw pointer to module text in exp-expectfn e.g. ipnatq931expect. nfcthelperexpectfnunregister only unlinks the callba...

kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931()

A flaw was found in the Linux kernel's netfilter subsystem, specifically within the nfconntrackh323 module. This vulnerability occurs in the DecodeQ931 function when processing a zero-length value from a packet. An integer underflow during a length calculation results in a large, incorrect value...

netfilter: nft_ct: fix missing expect put in obj eval

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netfilter: nft_ct: bail out on template ct in get eval

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SUSE CVE-2026-52986

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntracksip: don't use simplestrtoul Replace unsafe port parsing in epaddrlen, ctsipparseheaderuri, and ctsipparserequest with a new sipparseport helper that validates each digit against the buffer limit, eliminatin...

SUSE CVE-2026-53267

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftct: bail out on template ct in get eval I noticed this issue while looking at a historic syzbot report 1. A rule like the one below is enough to trigger the bug: table ip t chain pre type filter hook prerouting...

SUSE CVE-2026-53268

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrackirc: fix possible out-of-bounds read When parsing fails after we've matched the command string we should bail out instead of trying to match a different command. This helper should be deprecated, given...

UBUNTU-CVE-2026-53267

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftct: bail out on template ct in get eval I noticed this issue while looking at a historic syzbot report 1. A rule like the one below is enough to trigger the bug: table ip t chain pre type filter hook prerouting...

CVE-2026-53268 netfilter: conntrack_irc: fix possible out-of-bounds read

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrackirc: fix possible out-of-bounds read When parsing fails after we've matched the command string we should bail out instead of trying to match a different command. This helper should be deprecated, given...

CVE-2026-53267

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftct: bail out on template ct in get eval I noticed this issue while looking at a historic syzbot report 1. A rule like the one below is enough to trigger the bug: table ip t chain pre type filter hook prerouting...

CVE-2026-53267

The CVE-2026-53267 entry concerns a Linux kernel netfilter nft_ct use-after-free style issue where a per-CPU template conntrack entry can be treated as a real ct, causing a 16-byte memcpy path to overflow the kernel stack when using NFT_REG32_15. The root cause is that a template ct is not reject...

EUVD-2026-38838

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftct: fix missing expect put in obj eval nftctexpectobjeval allocates an expectation and may call nfctexpectrelated, but never drops its local reference. Add nfctexpectputexp before return to balance allocation...

CVE-2026-52970 netfilter: nft_ct: fix missing expect put in obj eval

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftct: fix missing expect put in obj eval nftctexpectobjeval allocates an expectation and may call nfctexpectrelated, but never drops its local reference. Add nfctexpectputexp before return to balance allocation...

kernel: netfilter: ctnetlink: ensure safe access to master conntrack

A flaw was found in the netfilter: ctnetlink component of the Linux kernel. This vulnerability occurs due to insufficient locking when accessing the master conntrack object, allowing it to become invalid while still being referenced. A local attacker could potentially exploit this race condition,...

AlmaLinux 9 : kernel (ALSA-2026:25217)

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:25217 advisory. kernel: scsi: target: iscsi: Fix use-after-free in iscsitdecconnusagecount CVE-2026-23216 kernel: Linux kernel: Use-after-free in bonding driver leads to...

net/sched: act_ct: Only release RCU read lock after ct_ft

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CVE-2026-46319 net/sched: act_ct: Only release RCU read lock after ct_ft

In the Linux kernel, the following vulnerability has been resolved: net/sched: actct: Only release RCU read lock after ctft When looking up a flow table in actct in tcfctflowtableget, rhashtablelookupfast internally opens and closes an RCU read critical section before returning ctft. The...

RHEL 8 : kernel (RHSA-2026:21706)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:21706 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: Bluetooth: MGMT: Fix possible...

kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931()

A flaw was found in the Linux kernel's netfilter subsystem, specifically within the nfconntrackh323 module. This vulnerability occurs in the DecodeQ931 function when processing a zero-length value from a packet. An integer underflow during a length calculation results in a large, incorrect value...

kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup

A flaw was found in the Linux kernel's netfilter subsystem, specifically within the nfconntrackhelper. When a connection tracking helper is unregistered, its associated expectations are not properly cleaned up. This oversight can lead to a use-after-free vulnerability, where the system attempts t...