43 matches found
CVE-2026-31423
A flaw was found in the Linux kernel's Hierarchical Fair Service Curve HFSC network scheduler. When processing specific large input values, a calculation error can cause a variable to be truncated to zero. This zero value is then used as a divisor, leading to a divide-by-zero error and a system...
UBUNTU-CVE-2026-31423
In the Linux kernel, the following vulnerability has been resolved: net/sched: schhfsc: fix divide-by-zero in rtscmin m2sm converts a u32 slope to a u64 scaled value. For large inputs e.g. m1=4000000000, the result can reach 2^32. rtscmin stores the difference of two such u64 values in a u32...
Unity Linux 20.1070a Security Update: kernel (UTSA-2026-005810)
The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005810 advisory. In the Linux kernel, the following vulnerability has been resolved: schhfsc: Fix qlen accounting bug when using peek in hfscenqueue When enqueuing the first packet t...
kernel: net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too
In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a potential UAF in hfscdequeue too Similarly to the previous patch, we need to safe guard hfscdequeue too. But for this one, we don't have a reliable reproducer...
kernel: sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue()
A flaw was found in the HFSC queueing discipline implementation in the Linux kernel. When a packet is enqueued and the child qdisc's peek function is called before properly updating the HFSC queue's length and backlog counters, a race condition can occur. In some cases, the peek operation may...
kernel: net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too
In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a potential UAF in hfscdequeue too Similarly to the previous patch, we need to safe guard hfscdequeue too. But for this one, we don't have a reliable reproducer...
kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling
In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a UAF vulnerability in class handling This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue occurs due to a time-of-check/time-of-use condition in hfscchangeclass when...
Moderate: kernel-rt security update
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fixes: kernel: nfsd: don't ignore the return code of svcprocregister CVE-2025-22026 kernel: netsched: hfsc: Fix a UAF vulnerability in class...
kernel: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc
A use-after-free vulnerability has been identified in the Linux kernel's HFSC Hierarchical Fair Service Curve queuing discipline when it is configured with NETEM Network Emulation as a child. This flaw can lead to a kernel panic or crash due to incorrect assumptions about the queue state...
kernel: net/sched: Always pass notifications when child class becomes empty
A use-after-free UAF vulnerability was found in the Linux kernel's net/sched subsystem, specifically in the Credit-Based Shaper CBS qdisc implementation schcbs. The vulnerability occurs because the CBS qdisc's reset function qdiscresetqueue only resets its internal queue but fails to reset its...
kernel: sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue()
A flaw was found in the HFSC queueing discipline implementation in the Linux kernel. When a packet is enqueued and the child qdisc's peek function is called before properly updating the HFSC queue's length and backlog counters, a race condition can occur. In some cases, the peek operation may...
kernel: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc
A use-after-free vulnerability has been identified in the Linux kernel's HFSC Hierarchical Fair Service Curve queuing discipline when it is configured with NETEM Network Emulation as a child. This flaw can lead to a kernel panic or crash due to incorrect assumptions about the queue state...
kernel: net_sched: hfsc: Address reentrant enqueue adding class to eltree twice
A use-after-free UAF vulnerability, which also presents a potential infinite loop condition, has been resolved in the Linux kernel. This flaw affects the HFSC Hierarchical Fair Service Curve queuing discipline when it is used in conjunction with NETEM Network Emulation. A malicious user could...
kernel: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc
A use-after-free vulnerability has been identified in the Linux kernel's HFSC Hierarchical Fair Service Curve queuing discipline when it is configured with NETEM Network Emulation as a child. This flaw can lead to a kernel panic or crash due to incorrect assumptions about the queue state...
kernel: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc
A use-after-free vulnerability has been identified in the Linux kernel's HFSC Hierarchical Fair Service Curve queuing discipline when it is configured with NETEM Network Emulation as a child. This flaw can lead to a kernel panic or crash due to incorrect assumptions about the queue state...
kernel: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc
A use-after-free vulnerability has been identified in the Linux kernel's HFSC Hierarchical Fair Service Curve queuing discipline when it is configured with NETEM Network Emulation as a child. This flaw can lead to a kernel panic or crash due to incorrect assumptions about the queue state...
kernel: net_sched: hfsc: Address reentrant enqueue adding class to eltree twice
A use-after-free UAF vulnerability, which also presents a potential infinite loop condition, has been resolved in the Linux kernel. This flaw affects the HFSC Hierarchical Fair Service Curve queuing discipline when it is used in conjunction with NETEM Network Emulation. A malicious user could...
kernel: net_sched: hfsc: Address reentrant enqueue adding class to eltree twice
A use-after-free UAF vulnerability, which also presents a potential infinite loop condition, has been resolved in the Linux kernel. This flaw affects the HFSC Hierarchical Fair Service Curve queuing discipline when it is used in conjunction with NETEM Network Emulation. A malicious user could...
SUSE-SU-2025:20733-1 Security update for kernel-livepatch-MICRO-6-0_Update_6
This update for kernel-livepatch-MICRO-6-0Update6 fixes the following issues: - CVE-2025-38177: kernel: schhfsc: make hfscqlennotify idempotent bsc1246356 - CVE-2025-38109: net/mlx5: fix ECVF vports unload on shutdown flow bsc1245685 - CVE-2025-38181: calipso: fix null-ptr-deref in...
CLSA-2025-1758009294 kernel: Fix of 3 CVEs
posix-cpu-timers: fix race between handleposixcputimers and posixcputimerdel CVE-2025-38352 - schqfq: make qfqqlennotify idempotent CVE-2025-38177 - schhfsc: make hfscqlennotify idempotent CVE-2025-38177 - schdrr: make drrqlennotify idempotent CVE-2025-38177 - schhtb: make htbqlennotify...