Linux Distros Unpatched Vulnerability : CVE-2026-53080

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net/sched: clsfw: fix NULL dereference of old filters before change Like pointed out by Sashiko 1, since commit ed76f5edccc9 net: sched: protect filterchain lis...

PT-2026-51974

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the cls fw module where TC filters are added to a shared block and published to the datapath before their change function is called. This allows an invalid filter...

CVE-2026-31421

CVE-2026-31421 – Linux kernel net/sched cls_fw NULL pointer dereference . Root cause: in fw_classify(), the old-method path uses tcf_block_q() and dereferences q->handle; for shared blocks, block->q is NULL, causing a NULL pointer dereference when a nonzero skb is classified. The fix preven...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from a null pointer dereferencing in the clsfw module when shared blocks are involved, potentially...

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...

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...

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...

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...

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...

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...

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...

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...

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...

Important: kernel-livepatch-6.1.34-58.102

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...

Important: kernel-livepatch-5.10.184-175.749

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...

SUSE CVE-2023-4207

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...

DEBIAN-CVE-2023-4207

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...

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...

UBUNTU-CVE-2023-4207

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...

Use-after-free in Linux kernel's net/sched: cls_fw component

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