CVE-2026-74620

A flaw was found in the Linux kernel's net/sched subsystem, specifically within the actgact and actpolice modules. A local user could exploit this vulnerability by providing a specially crafted control action that bypasses proper range checks. This improper handling of control actions leads to an...

Security update for the Linux Kernel (Live Patch 31 for SUSE Linux Enterprise 15 SP5)

This update for the SUSE Linux Enterprise Kernel 5.14.21-150500.55.124 fixes various security issues: The following security issues were fixed: CVE-2023-53995: net: ipv4: fix one memleak in inetdelifa bsc1269284. CVE-2025-40204,CVE-2026-53224,CVE-2026-53246: sctp: validate cached peer INIT chunk...

CVE-2026-74663

In the Linux kernel, the following vulnerability has been resolved: net/sched: reject overly deep qdisc hierarchies Deep qdisc hierarchies can lead to excessive recursion in qdisc tree walkers and exhaust the kernel stack. The existing loop check does not cover the create-and-graft path, so a...

CVE-2026-74663 net/sched: reject overly deep qdisc hierarchies

In the Linux kernel, the following vulnerability has been resolved: net/sched: reject overly deep qdisc hierarchies Deep qdisc hierarchies can lead to excessive recursion in qdisc tree walkers and exhaust the kernel stack. The existing loop check does not cover the create-and-graft path, so a...

CVE-2026-74663

CVE-2026-74663 affects the Linux kernel in the net/sched subsystem. Deep queueing discipline (qdisc) hierarchies can cause excessive recursion in qdisc tree walkers, exhausting the kernel stack and leading to a Denial of Service via system crash. The existing loop check does not cover the create-...

CVE-2026-74621 net/sched: act_ct: fix sk_buff leak when the header checks reject a packet

In the Linux kernel, the following vulnerability has been resolved: net/sched: actct: fix skbuff leak when the header checks reject a packet tcfcthandlefragments runs its header sanity checks before handing anything to the defragmentation engine: if family == NFPROTOIPV4 err =...

CVE-2026-74621

CVE-2026-74621 is an unbounded memory leak in the Linux kernel's net/sched: act_ct (traffic control connection-tracking action). When tcf_ct_handle_fragments() rejects a packet via header sanity checks (returning -EINVAL, -ENOMEM, or -EPROTO), the skb remains owned by the caller, yet tcf_ct_act()...

Linux Distros Unpatched Vulnerability : CVE-2026-74700

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net/sched: clsapi: Always acquire rtnllock when destroying locked classifiers Another challenge with unlocked filters. There is a short window in tcnewtfilter...

Linux Distros Unpatched Vulnerability : CVE-2026-74663

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net/sched: reject overly deep qdisc hierarchies Deep qdisc hierarchies can lead to excessive recursion in qdisc tree walkers and exhaust the kernel stack. The...

Linux Distros Unpatched Vulnerability : CVE-2026-74621

"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net/sched: actct: fix skbuff leak when the header checks reject a packet tcfcthandlefragments runs its header sanity checks before handing anything to the...

PT-2026-79626

In the Linux kernel, the following vulnerability has been resolved: net/sched: act ct: fix sk buff leak when the header checks reject a packet tcf ct handle fragments runs its header sanity checks before handing anything to the defragmentation engine: if family == NFPROTO IPV4 err = tcf ct ipv4 i...

PT-2026-79668

In the Linux kernel, the following vulnerability has been resolved: net/sched: reject overly deep qdisc hierarchies Deep qdisc hierarchies can lead to excessive recursion in qdisc tree walkers and exhaust the kernel stack. The existing loop check does not cover the create-and-graft path, so a...

CVE-2026-74583

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsroute: fix fastmap use-after-free on filter The route4 classifier maintains a 16-slot fastmap cache that stores raw struct route4filter pointers indexed by id, iif. The reader route4classify populates this cache via...

PT-2026-79404

In the Linux kernel, the following vulnerability has been resolved: net/sched: cls route: fix fastmap use-after-free on filter The route4 classifier maintains a 16-slot fastmap cache that stores raw struct route4 filter pointers indexed by id, iif. The reader route4 classify populates this cache...

Linux Distros Unpatched Vulnerability : CVE-2026-74284

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net/sched: schhfsc: Don't make class passive twice updatevf is called from two places for the same class during a single dequeue when the class's child qdisc e....

Linux Distros Unpatched Vulnerability : CVE-2026-72326

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net/sched: cake: reject overhead values that underflow length CAKE accepts signed overhead values and stores them in an s16, but the adjusted packet length...

Linux Distros Unpatched Vulnerability : CVE-2026-72430

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net/sched: actct: fix nfconnlabels leak on two error paths tcfctfillparams calls nfconnlabelsget setting putlabels when TCACTLABELS is present, but two later...

kernel: net/sched: act_api: use RCU with deferred freeing for action lifecycle

A flaw was found in the Linux kernel's networking scheduler. A race condition, which is a problem that occurs when multiple operations try to access the same resource at the same time, exists when network filter operations are run concurrently. This can lead to a Use-After-Free UAF vulnerability,...

Important: Red Hat Security Advisory: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is...

kernel: net/sched: act_api: use RCU with deferred freeing for action lifecycle

A flaw was found in the Linux kernel's networking scheduler. A race condition, which is a problem that occurs when multiple operations try to access the same resource at the same time, exists when network filter operations are run concurrently. This can lead to a Use-After-Free UAF vulnerability,...