CVE-2025-21700 net: sched: Disallow replacing of child qdisc from one parent to another

In the Linux kernel, the following vulnerability has been resolved: net: sched: Disallow replacing of child qdisc from one parent to another Lion Ackermann was able to create a UAF which can be abused for privilege escalation with the following script Step 1. create root qdisc tc qdisc add dev lo...

CVE-2025-21700

CVE-2025-21700 is a Linux kernel vulnerability in net: sched that allowed a use-after-free (UAF) scenario to escalate privileges when replacing a child qdisc from one parent to another. The provided description and demonstration show steps manipulating tc qdisc/classqdisc layout and grafting, cul...

CLSA-2025-1739352814 kernel: Fix of 13 CVEs

media: uvcvideo: Skip parsing frames of type UVCVSUNDEFINED in uvcparseformat CVE-2024-53104 - btrfs: fix information leak in btrfsioctllogicaltoino CVE-2024-35849 - net: afcan: do not leave a dangling sk pointer in cancreate CVE-2024-56603 - netfilter: xtables: fix LED ID check in ledtgcheck...

Security update for the Linux Kernel

The SUSE Linux Enterprise 15 SP6 Azure kernel was updated to receive various security bugfixes. The following security bugs were fixed: CVE-2023-52489: mm/sparsemem: fix race in accessing memorysection-usage bsc1221326. CVE-2024-45828: i3c: mipi-i3c-hci: Mask ring interrupts before ring stop...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net/sched: accept TCASTAB only for root qdisc Most qdisc implementations maintain their backlog using qdiscpktlenskb, under the assumption that this value is invariant between the enqueue and dequeue handlers. Unfortunately, the...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: sch/netem: fixed the use of memory after deallocation in netemdequeue. If netemdequeue enqueues a packet to an inner qdisc, and that qdisc returns NETXMITSTOLEN. As a result, the packet is dropped, but qdisctreereducebacklog i...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net: added more sanity checks to qdiscpktleninit. One of the approaches handles SKBGSODODGY, assuming that skb-len is greater than hdrlen. The function virtionethdrtoskb does not fully dissect TCP headers; it only ensures that th...

Astra Linux – Vulnerability in Linux 6.1

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 in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net/sched: stop qdisctreereducebacklog on TCHROOT In qdisctreereducebacklog, Qdiscs with a major handle of ffff: are assumed to be either root or ingress. This assumption is incorrect, as it is possible to create egress Qdiscs wi...

SUSE CVE-2025-21692

In the Linux kernel, the following vulnerability has been resolved: net: sched: fix ets qdisc OOB Indexing Haowei Yan found that etsclassfromarg can index an Out-Of-Bound class in etsclassfromarg when passed clid of 0. The overflow may cause local privilege escalation. 18.852298 ------------ cut...

AZL-57012 CVE-2025-21692 affecting package kernel for versions less than 5.15.180.1-1

In the Linux kernel, the following vulnerability has been resolved: net: sched: fix ets qdisc OOB Indexing Haowei Yan found that etsclassfromarg can index an Out-Of-Bound class in etsclassfromarg when passed clid of 0. The overflow may cause local privilege escalation. 18.852298 ------------ cut...

DEBIAN-CVE-2025-21692

In the Linux kernel, the following vulnerability has been resolved: net: sched: fix ets qdisc OOB Indexing Haowei Yan found that etsclassfromarg can index an Out-Of-Bound class in etsclassfromarg when passed clid of 0. The overflow may cause local privilege escalation. 18.852298 ------------ cut...

AZL-57028 CVE-2025-21692 affecting package kernel for versions less than 6.6.76.1-1

In the Linux kernel, the following vulnerability has been resolved: net: sched: fix ets qdisc OOB Indexing Haowei Yan found that etsclassfromarg can index an Out-Of-Bound class in etsclassfromarg when passed clid of 0. The overflow may cause local privilege escalation. 18.852298 ------------ cut...

UBUNTU-CVE-2025-21692

In the Linux kernel, the following vulnerability has been resolved: net: sched: fix ets qdisc OOB Indexing Haowei Yan found that etsclassfromarg can index an Out-Of-Bound class in etsclassfromarg when passed clid of 0. The overflow may cause local privilege escalation. 18.852298 ------------ cut...

CVE-2025-21692 net: sched: fix ets qdisc OOB Indexing

In the Linux kernel, the following vulnerability has been resolved: net: sched: fix ets qdisc OOB Indexing Haowei Yan found that etsclassfromarg can index an Out-Of-Bound class in etsclassfromarg when passed clid of 0. The overflow may cause local privilege escalation. 18.852298 ------------ cut...

Azure Linux 3.0 Security Update: kernel (CVE-2024-50039)

The version of kernel installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-50039 advisory. - In the Linux kernel, the following vulnerability has been resolved: net/sched: accept TCASTAB only for root...

SUSE CVE-2024-56770

In the Linux kernel, the following vulnerability has been resolved: net/sched: netem: account for backlog updates from child qdisc In general, 'qlen' of any classful qdisc should keep track of the number of packets that the qdisc itself and all of its children holds. In case of netem, 'qlen' only...

CVE-2024-56770

In the Linux kernel, the following vulnerability has been resolved: net/sched: netem: account for backlog updates from child qdisc In general, 'qlen' of any classful qdisc should keep track of the number of packets that the qdisc itself and all of its children holds. In case of netem, 'qlen' only...

AZL-55428 CVE-2024-56770 affecting package kernel for versions less than 5.15.176.3-1

In the Linux kernel, the following vulnerability has been resolved: net/sched: netem: account for backlog updates from child qdisc In general, 'qlen' of any classful qdisc should keep track of the number of packets that the qdisc itself and all of its children holds. In case of netem, 'qlen' only...

AZL-55431 CVE-2024-56770 affecting package kernel for versions less than 6.6.76.1-1

In the Linux kernel, the following vulnerability has been resolved: net/sched: netem: account for backlog updates from child qdisc In general, 'qlen' of any classful qdisc should keep track of the number of packets that the qdisc itself and all of its children holds. In case of netem, 'qlen' only...