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: - In the net:sched section, there is a fix for the order of qlen adjustment. - Changes to sch-q.qlen related to qdisctreereducebacklog need to occur before a call to that function. Otherwise, it may fail to notify the parent...

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: net/sched: netem: account for backlog updates from child qdisc Generally, the qlen of any classful qdisc should reflect the number of packets held by the qdisc itself and all its children. In the case of netem, qlen only accounts...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: net:sched: fixed a possible refcount leak in tcnewtfilter. It is necessary to call tfilterput to store the refcount obtained from tp-ops-get, to avoid possible refcount leaks when chain-tmpltops != NULL and chain-tmpltops !=...

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

In the Linux kernel, the following vulnerability has been resolved: net/sched: schqfq: Fixed a null dereference in aggdequeue. To prevent a potential crash in aggdequeue when cl-qdisc-ops-peekcl-qdisc returns NULL, we check the returned value before using it, similar to the existing approach in...

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

In the Linux kernel, the following vulnerabilities have been resolved: net/sched: actife: avoided possible NULL derefrence tcfifeencode must ensure that ifeencode does not return NULL. syzbot reported: Oops: general protection fault, likely for non-canonical address 0xdffffc0000000000: 0000 1 SMP...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: net/sched: schtaprio: fixed possible use-after-free issue. syzbot reported a serious crash 1 in nettxaction, which made no sense until we obtained a reproducible example. This example reinstalls the taprio qdisc, but an invali...

Security update for the Linux Kernel RT (Live Patch 17 for SUSE Linux Enterprise 15 SP7)

This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.7.62 fixes various security issues: The following security issues were fixed: CVE-2026-53360: KVM: SEV: Require in-GHCB scratch area if GHCB v2+ is in use bsc1270303. CVE-2026-64423: ipv4: igmp: remove multicast group from hash table o...

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,...

CVE-2026-80630

In the Linux kernel, the following vulnerability has been resolved: net/sched: schfqcodel: Do not call qdisctreereducebacklog during peek before restoring qlen Whenever fqcodel drops packets during peek, it calls qdisctreereducebacklog. An issue arises because it calls qdisctreereducebacklog befo...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098689)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098689 advisory. In the Linux kernel, the following vulnerability has been resolved: netsched: schsfq: reject invalid perturb period Gerrard Tai reported that SFQ perturbperiod has n...

CVE-2026-74266

A flaw was found in the Linux kernel's schdualpi2 network scheduler. When the scheduler processes network packets, it can incorrectly manage its internal queue length. This mismanagement can lead to a system crash, making the system unavailable Denial of Service...

CVE-2026-72430

A flaw was found in the Linux kernel's network scheduling component. An unprivileged user with administrative privileges in a network environment can trigger a resource leak. This occurs when specific error handling paths fail to properly release network connection labels. Repeated exploitation o...

CVE-2026-74290 net/sched: cls_flow: Dont expose folded kernel pointers

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsflow: Dont expose folded kernel pointers The flow classifier falls back to addrfold for fields that are missing from packet headers. In map mode, userspace controls mask, xor, rshift, addend and divisor, and can...

CVE-2026-74266

The CVE-2026-74266 family documents a Linux kernel vulnerability in net/sched sch_dualpi2 where qdisc_tree_reduce_backlog is invoked during peek before the queue length (qlen) is restored. This causes a race where, if qlen drops to zero but a packet remains, the parent’s qlen_notify callback can ...

CVE-2026-74266 net/sched: sch_dualpi2: Do not call qdisc_tree_reduce_backlog during peek before restoring qlen

In the Linux kernel, the following vulnerability has been resolved: net/sched: schdualpi2: Do not call qdisctreereducebacklog during peek before restoring qlen Whenever dualpi2 drops packets during peek, it calls qdisctreereducebacklog. An issue arises because it calls qdisctreereducebacklog befo...

CVE-2026-72036 net/sched: sch_multiq: Replace direct dequeue call with peek and qdisc_dequeue_peeked

In the Linux kernel, the following vulnerability has been resolved: net/sched: schmultiq: Replace direct dequeue call with peek and qdiscdequeuepeeked multiqdequeue takes a packet from a band's child with a direct -dequeue call after multiqpeek peeked it. When the child is non-work-conserving the...

EUVD-2026-58993

In the Linux kernel, the following vulnerability has been resolved: net/sched: schtaprio: Replace direct dequeue call with peek and qdiscdequeuepeeked When taprio's software path peeks a non-work-conserving child qdisc, the child stashes the peeked skb in its gsoskb; tapriodequeuefromtxq then tak...

PT-2026-72225

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the multiq dequeue function where a packet is retrieved from a band's child using a direct -dequeue call following a multiq peek operation. In cases where the child is...

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

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,...