PT-2026-128429

In the Linux kernel, the following vulnerability has been resolved: net/sched: act ct: fix helper UAF due to extensions realloc While calling the helpers, a raw pointer to the extensions area is wired into expectations list: - nf ct helper - helper-help - nf ct expect related report - nf ct expec...

PT-2026-128531

In the Linux kernel, the following vulnerability has been resolved: net/sched: act ct: avoid modifying shared unconfirmed ct entry In a case where skb with an unconfirmed ct entry gets cloned, we may end up processing both again but with different sets of extensions. The series of events: 1. The...

PT-2026-116841

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists where the flow offload alloc function returns NULL during a conntrack flush or when a GFP ATOMIC allocation fails. While these events are expected under load, the system...

PT-2026-116660

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the act ct component of the network scheduler where shared unconfirmed connection tracking ct entries can be modified. When a socket buffer skb with an unconfirmed ct...

PT-2026-116661

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A Use-After-Free UAF issue exists in the net/sched: act ct component. This occurs when a raw pointer to the extensions area is added to the expectations list during the execution of nf c...

PT-2026-128389

In the Linux kernel, the following vulnerability has been resolved: net/sched: act ct: don't WARN on benign flow offload alloc failure flow offload alloc returns NULL when the conntrack entry is dying e.g. raced with a conntrack flush or when the GFP ATOMIC allocation fails; both are expected und...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net/sched: Only allow actct to bind to clsact/ingress qdiscs and shared blocks. As Paolo mentioned earlier 1: “Since the problematic commit below, classify can return TCACTCONSUMED while holding the current skb that is managed by...

PT-2026-79626

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 7.2-rc6 Description An issue exists in the net/sched component where a memory leak occurs when header checks reject a packet. Specifically, the tcf ct handle fragments function performs sanity checks using tcf ct...

PT-2026-72246

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the net/sched component where the tcf ct handle fragments function calls nf ct handle fragments without saving and restoring the skb-cb control buffer. Because the...

SUSE CVE-2026-46319

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...

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...

CVE-2026-46319

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 9 : kernel (RHSA-2026:22940)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:22940 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: net/sched: Make cakeenqueue...

kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation

A flaw was found in the Linux kernel. A use-after-free vulnerability exists in the traffic control actct path when it is incorrectly configured with non-ingress egress qdiscs queueing disciplines. This can allow a local user with specific privileges to trigger a kernel crash, leading to a denial ...

kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation

A flaw was found in the Linux kernel. A use-after-free vulnerability exists in the traffic control actct path when it is incorrectly configured with non-ingress egress qdiscs queueing disciplines. This can allow a local user with specific privileges to trigger a kernel crash, leading to a denial ...

kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation

A flaw was found in the Linux kernel. A use-after-free vulnerability exists in the traffic control actct path when it is incorrectly configured with non-ingress egress qdiscs queueing disciplines. This can allow a local user with specific privileges to trigger a kernel crash, leading to a denial ...

kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation

A flaw was found in the Linux kernel. A use-after-free vulnerability exists in the traffic control actct path when it is incorrectly configured with non-ingress egress qdiscs queueing disciplines. This can allow a local user with specific privileges to trigger a kernel crash, leading to a denial ...

kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation

A flaw was found in the Linux kernel. A use-after-free vulnerability exists in the traffic control actct path when it is incorrectly configured with non-ingress egress qdiscs queueing disciplines. This can allow a local user with specific privileges to trigger a kernel crash, leading to a denial ...

kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation

A flaw was found in the Linux kernel. A use-after-free vulnerability exists in the traffic control actct path when it is incorrectly configured with non-ingress egress qdiscs queueing disciplines. This can allow a local user with specific privileges to trigger a kernel crash, leading to a denial ...

kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation

A flaw was found in the Linux kernel. A use-after-free vulnerability exists in the traffic control actct path when it is incorrectly configured with non-ingress egress qdiscs queueing disciplines. This can allow a local user with specific privileges to trigger a kernel crash, leading to a denial ...