kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route

There are 3 CVEs for the use-after-free flaw found in net/sched/clsfw.c in classifiers clsfw, clsu32, and clsroute in the Linux Kernel: CVE-2023-4206, CVE-2023-4207, CVE-2023-4208. A local user could use any of these flaws to crash the system or potentially escalate their privileges on the system...

Important: kernel-livepatch-4.14.322-246.539

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

kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route

This record is a duplicate of CVE-2023-4206, CVE-2023-4207, and CVE-2023-4208. Do not use this CVE record: CVE-2023-4128...

kernel: net/sched: cls_u32 component reference counter leak if tcf_change_indev() fails

A double-free flaw was found in u32setparms in net/sched/clsu32.c in the Network Scheduler component in the Linux kernel. This flaw allows a local attacker to use a failure event to mishandle the reference counter, leading to a local privilege escalation threat...

kernel: net/sched: cls_u32 component reference counter leak if tcf_change_indev() fails

A double-free flaw was found in u32setparms in net/sched/clsu32.c in the Network Scheduler component in the Linux kernel. This flaw allows a local attacker to use a failure event to mishandle the reference counter, leading to a local privilege escalation threat...

kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route

This record is a duplicate of CVE-2023-4206, CVE-2023-4207, and CVE-2023-4208. Do not use this CVE record: CVE-2023-4128...

Important: kernel-livepatch-4.14.320-242.534

Issue Overview: A use-after-free vulnerability in the Linux kernel's net/sched: clsu32 component can be exploited to achieve local privilege escalation. If tcfchangeindev fails, u32setparms will immediately return an error after incrementing or decrementing the reference counter in tcfbindfilter...

kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function

A use-after-free vulnerability was found in fwsetparms in net/sched/clsfw.c in network scheduler sub-component in the Linux Kernel. This issue occurs due to a missing sanity check during cleanup at the time of failure, leading to a misleading reference. This may allow a local attacker to gain loc...

Vulnerability of the net/sched: cls_fw component in Linux operating system kernels, which allows attackers to increase their privileges

The vulnerability of the net/sched:clsfw component in Linux operating systems relates to the possibility of exploitation after it is released. Exploiting this vulnerability could allow an attacker to enhance their privileges...

AZL-28678 CVE-2023-4207 affecting package kernel for versions less than 5.15.131.1-2

A use-after-free vulnerability in the Linux kernel's net/sched: clsfw component can be exploited to achieve local privilege escalation. When fwchange is called on an existing filter, the whole tcfresult struct is always copied into the new instance of the filter. This causes a problem when updati...

CLSA-2023-1693827560 Fix of 9 CVEs

Jammy update: v5.15.86 upstream stable release LP: 2005113 // CVE-url: https://ubuntu.com/security/CVE-2022-3606 - libbpf: Fix null-pointer dereference in findprogbysecinsn Jammy update: v5.15.87 upstream stable release LP: 2007441 // CVE-url: https://ubuntu.com/security/CVE-2023-23454 - net:...

OESA-2023-1537 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: A use-after-free flaw was found in net/sched/clsfw.c in classifiers clsfw, clsu32, and clsroute in the Linux Kernel. This flaw allows a local attacker to perform a local privilege escalation due to incorrect handling of the...

OESA-2023-1538 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: A use-after-free flaw was found in net/sched/clsfw.c in classifiers clsfw, clsu32, and clsroute in the Linux Kernel. This flaw allows a local attacker to perform a local privilege escalation due to incorrect handling of the...

PT-2023-4897 · Linux +6 · Linux Kernel +6

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: A use-after-free vulnerability in the Linux kernel's net/sched: cls u32 component can be exploited to achieve local privilege escalation. When u32 change is called on an existing filte...

The vulnerability of the u32_set_parms() function in the net/sched/cls_u32.c module of the Linux operating system allows a attacker to compromise the confidentiality, integrity, and accessibility of data.

The vulnerability of the u32setparms function in the net/sched/clsu32.c module of the Linux operating system is related to incorrect handling of usage counters. Exploiting this vulnerability could allow an attacker to compromise the confidentiality, integrity, and accessibility of data...

Linux kernel 缓冲区错误漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that originates in the qfqchangeagg function in net/sched/schqfq.c that allows out-of-bounds writes. An attacker could explo...

kernel: slab-out-of-bounds read vulnerabilities in cbq_classify

An out-of-bounds OOB read problem was found in cbqclassify in net/sched/schcbq.c in the Linux kernel. This issue may allow a local attacker to cause a denial of service due to type confusion. Non-negative numbers could indicate a TCACTSHOT condition rather than valid classification results...

Medium: kernel

Issue Overview: bpf: incorrect verifier pruning due to missing register precision taints, which may lead to out-of-band read/write access due to an incorrect verifier conclusion. CVE-2023-2163 A use-after-free vulnerability was found in the Linux kernel's ext4 filesystem in the way it handled the...

Design/Logic Flaw

qfqchangeclass in net/sched/schqfq.c in the Linux kernel before 6.2.13 allows an out-of-bounds write because lmax can exceed QFQMINLMAX...

atm_tc_enqueue in net/sched/sch_atm.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classification results).

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