Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: sched: flower: protect flwalk with rcu Patch that refactored flwalk to use idrforeachentrycontinueul also removed rcu protection of individual filters which causes following use-after-free when filter is deleted concurrently...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: net: sched: Disallow replacing of child qdisc from one parent to another. Lion Ackermann was able to create a Use-after-Allocation UAF that can be exploited for privilege escalation using the following scripts: Step 1: Create ...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: netsched: Prevent the creation of classes with TCHROOT. The function qdisctreereducebacklog uses TCHROOT as a termination condition when traversing the qdisc tree to update parent backlogs. However, if a class is created with...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15

A use-after-free vulnerability exists in the Linux kernel’s net/sched:clsfw component, which can be exploited to achieve local privilege escalation. When the fwchange function is called on an existing filter, the entire tcfresult struct is always copied into the new instance of the filter. This...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: net/sched: Fixed a UAF issue when resolving a clash. KASAN reports the following UAF issues: - BUG: KASAN: A slab-use-after-free issue in tcfctflowtableprocessconn+0x12b/0x380 actct. A size 1 read at address ffff888c07603600 w...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net/sched: Fixed reference leaks related to netdevice objects in attachdefaultqdiscs. In attachdefaultqdiscs, if a device has multiple queues and queue 0 fails to attach a qdisc due to lack of memory during attachonedefaultqdisc,...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: net/sched: fixed the lockdep issue in qdisctreereducebacklog qdisctreereducebacklog is called with the qdisc lock held, not RTNL. We must use qdisclookuprcu instead of qdisclookup syzbot reported: WARNING: suspicious RCU usage...

EUVD-2026-55563

In the Linux kernel, the following vulnerability has been resolved: net/sched: acttunnelkey: Defer dstrelease to RCU callback Fix a race-condition use-after-free in tunnelkeyreleaseparams. The function releases the metadatadst of the old params synchronously via dstrelease while deferring the...

Oracle Linux 9 : kernel (ELSA-2026-49212)

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-49212 advisory. - net/sched: clsapi: Handle TCACTCONSUMED in tcfqeventhandle CKI Backport Bot RHEL-213299 CVE-2026-64530 - ipc: limit nextid allocation to the valid I...

RLSA-2026:49211 Important: kernel security, bug fix, and enhancement update

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: ksm: use range-walk function to jump over holes in scangetnextrmapitem CVE-2025-68211 kernel: isofs: validate Rock Ridge CE continuation extent against volume size CVE-2026-46303 kernel:...

RockyLinux 10 : kernel (RLSA-2026:49211)

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:49211 advisory. kernel: ksm: use range-walk function to jump over holes in scangetnextrmapitem CVE-2025-68211 kernel: isofs: validate Rock Ridge CE continuation extent...

Important: Red Hat Security Advisory: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 9. 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 available for each vulnerability from th...

Important: Red Hat Security Advisory: kernel security, bug fix, and enhancement update

An update for kernel is now available for Red Hat Enterprise Linux 10. 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 available for each vulnerability from t...

Important: kernel

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: ext4: replace BUGON with proper error handling in ext4readinlinefolio CVE-2026-31451 In the Linux kernel, the following vulnerability has been resolved: net/sched: fix pedit partial COW leading to page cache...

CVE-2026-64530

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsapi: Handle TCACTCONSUMED in tcfqeventhandle tcfclassify can return TCACTCONSUMED while the skb is held by the defragmentation engine e.g. actct on out-of-order fragments. When that happens the skb is no longer owne...

CVE-2026-64530 net/sched: cls_api: Handle TC_ACT_CONSUMED in tcf_qevent_handle

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsapi: Handle TCACTCONSUMED in tcfqeventhandle tcfclassify can return TCACTCONSUMED while the skb is held by the defragmentation engine e.g. actct on out-of-order fragments. When that happens the skb is no longer owne...

CVE-2026-64530

CVE-2026-64530 affects the Linux kernel net/sched subsystem. The root cause is that tcf_qevent_handle() did not properly handle TC_ACT_CONSUMED, causing the skb to be returned to the caller as if classification passed, while the defragmentation engine still owned it. This led to a use-after-free ...

SUSE CVE-2026-63982

In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix ethx:ingress - ethy:egress - ethx:ingress mirred loop When mirred redirects to ingress from either ingress or egress the loop state from schedmirreddev array dev is lost because of 1 the packet deferral into the...

Medium: kernel6.12

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: net/sched: fix pedit partial COW leading to page cache corruption CVE-2026-46331 Affected Packages: kernel6.12 Issue Correction: Run dnf update kernel6.12 --releasever 2023.12.20260720 or dnf update --advisory...

CVE-2026-63981

In the Linux kernel, the following vulnerability has been resolved: net/sched: actmirred: Fix blockcast recursion bypass leading to stack overflow tcfmirredact checks schedmirrednest against MIRREDNESTLIMIT 4 to prevent deep recursion. However, when the action uses blockcast tcfmblockid != 0, the...