SUSE-SU-2026:2722-1 Security update for the Linux Kernel

The SUSE Linux Enterprise 15 SP7 kernel was updated to receive various security bugfixes. The following security bugs were fixed: - CVE-2025-10263: arm64: errata: Mitigate TLBI errata on various Arm CPUs bsc1266290. - CVE-2025-68822: Input: alps - fix use-after-free bugs caused by dev3registerwor...

EUVD-2026-40983

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: bail out on template ct in get eval

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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...

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...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconncount: Fixed the issue where the “ct” field was leaked during error paths. There are some situations where “ct” might be leaked because error paths skip the refcounted check and return immediately. To address thi...

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,...

Astra Linux – Vulnerability in Linux 5.15

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 performing a ct clear between them, a reference to the old ct entry is still leaked. This occurs because tcfctskbnfctcached...

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...

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_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...

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_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_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...