UBUNTU-CVE-2025-21950

In the Linux kernel, the following vulnerability has been resolved: drivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmdioctl In the "pmcmdioctl" function, three memory objects allocated by kmalloc are initialized by "hcallgetcpustate", which are then copied to user space. The...

CVE-2025-21986

CVE-2025-21986 affects the Linux kernel net: switchdev notification path. The root cause is a blocking notification chain that uses a read-write semaphore to protect the chain, which allows recursive notifications to cause the semaphore to be acquired twice for reading. In certain bridge/offload ...

CVE-2025-21982

CVE-2025-21982 affects the Linux kernel’s pinctrl nuvoton npcm8xx GPIO firmware path. The issue stems from devm_kasprintf() potentially returning NULL on failure, with the NULL return not being checked in npcm8xx_gpio_fw(), leading to a kernel NULL pointer dereference. A fix adds a NULL-check in ...

CVE-2025-21983 mm/slab/kvfree_rcu: Switch to WQ_MEM_RECLAIM wq

In the Linux kernel, the following vulnerability has been resolved: mm/slab/kvfreercu: Switch to WQMEMRECLAIM wq Currently kvfreercu APIs use a system workqueue which is "systemunboundwq" to driver RCU machinery to reclaim a memory. Recently, it has been noted that the following kernel warning ca...

CVE-2025-21981 ice: fix memory leak in aRFS after reset

In the Linux kernel, the following vulnerability has been resolved: ice: fix memory leak in aRFS after reset Fix aRFS accelerated Receive Flow Steering structures memory leak by adding a checker to verify if aRFS memory is already allocated while configuring VSI. aRFS objects are allocated in two...

CVE-2025-21979 wifi: cfg80211: cancel wiphy_work before freeing wiphy

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: cancel wiphywork before freeing wiphy A wiphywork can be queued from the moment the wiphy is allocated and initialized i.e. wiphynewnm. When a wiphywork is queued, the rdev::wiphywork is getting queued. If wiphyfr...

CVE-2025-21979

CVE-2025-21979 affects the Linux kernel wifi stack (cfg80211). A wiphy_work can be queued as soon as the wiphy is allocated (wiphy_new_nm). If wiphy_free runs before the rdev::wiphy_work executes, the wiphy memory is freed and later accessed, leading to a use-after-free. The fix is to cancel the ...

CVE-2025-21977 fbdev: hyperv_fb: Fix hang in kdump kernel when on Hyper-V Gen 2 VMs

In the Linux kernel, the following vulnerability has been resolved: fbdev: hypervfb: Fix hang in kdump kernel when on Hyper-V Gen 2 VMs Gen 2 Hyper-V VMs boot via EFI and have a standard EFI framebuffer device. When the kdump kernel runs in such a VM, loading the efifb driver may hang because of...

CVE-2025-21975 net/mlx5: handle errors in mlx5_chains_create_table()

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: handle errors in mlx5chainscreatetable In mlx5chainscreatetable, the return value of mlx5getfdbsubns and mlx5getflownamespace must be checked to prevent NULL pointer dereferences. If either function fails, the function...

CVE-2025-21975

Technical details for CVE-2025-21975 are not publicly provided in the supplied Connected documents. The entry description exists, but there are no explicit affected products/versions, impact, or fixes in the connected items. Monitor for vendor advisories.

CVE-2025-21973 eth: bnxt: fix kernel panic in the bnxt_get_queue_stats{rx | tx}

In the Linux kernel, the following vulnerability has been resolved: eth: bnxt: fix kernel panic in the bnxtgetqueuestatsrx | tx When qstats-get operation is executed, callbacks of netdevstatsops are called. The bnxtgetqueuestatsrx | tx collect per-queue stats from swstats in the rings. But rx | t...

CVE-2025-21973 eth: bnxt: fix kernel panic in the bnxt_get_queue_stats{rx | tx}

In the Linux kernel, the following vulnerability has been resolved: eth: bnxt: fix kernel panic in the bnxtgetqueuestatsrx | tx When qstats-get operation is executed, callbacks of netdevstatsops are called. The bnxtgetqueuestatsrx | tx collect per-queue stats from swstats in the rings. But rx | t...

CVE-2025-21971 net_sched: Prevent creation of classes with TC_H_ROOT

In the Linux kernel, the following vulnerability has been resolved: netsched: Prevent creation of classes with TCHROOT The function qdisctreereducebacklog uses TCHROOT as a termination condition when traversing up the qdisc tree to update parent backlog counters. However, if a class is created wi...

CVE-2025-21971 net_sched: Prevent creation of classes with TC_H_ROOT

In the Linux kernel, the following vulnerability has been resolved: netsched: Prevent creation of classes with TCHROOT The function qdisctreereducebacklog uses TCHROOT as a termination condition when traversing up the qdisc tree to update parent backlog counters. However, if a class is created wi...

CVE-2025-21972 net: mctp: unshare packets when reassembling

In the Linux kernel, the following vulnerability has been resolved: net: mctp: unshare packets when reassembling Ensure that the fraglist used for reassembly isn't shared with other packets. This avoids incorrect reassembly when packets are cloned, and prevents a memory leak due to circular...

CVE-2025-21970 net/mlx5: Bridge, fix the crash caused by LAG state check

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Bridge, fix the crash caused by LAG state check When removing LAG device from bridge, NETDEVCHANGEUPPER event is triggered. Driver finds the lower devices PFs to flush all the offloaded entries. And mlx5lagissharedfdb i...

CVE-2025-21967

The CVE-2025-21967 issue affects the Linux kernel ksmbd subsystem, where a use-after-free could happen in ksmbd_free_work_struct because interim_entry of ksmbd_work could be deleted after an oplock is freed. The vulnerability details and remediation are confirmed by connected advisories (Azure Li...

CVE-2025-21966

Summary (CVE-2025-21966): Linux kernel vulnerability in the dm-flakey feature, where memory corruption could occur due to an incorrect parameter passed to bio_init in the optional corrupt_bio_byte path. The issue has been fixed in the kernel, with related fixes cited in public kernel patches (e.g...

CVE-2025-21963

CVE-2025-21963 (Linux kernel, CIFS) : The issue is a local integer overflow in the acdirmax mount option handling. User-supplied acdirmax (u32) is meant to have an upper bound, but the value is converted from seconds to jiffies before validation, enabling an integer overflow. The CVE entry notes ...

CVE-2025-21961 eth: bnxt: fix truesize for mb-xdp-pass case

In the Linux kernel, the following vulnerability has been resolved: eth: bnxt: fix truesize for mb-xdp-pass case When mb-xdp is set and return is XDPPASS, packet is converted from xdpbuff to skbuff with xdpupdateskbsharedinfo in bnxtxdpbuildskb. bnxtxdpbuildskb passes incorrect truesize argument ...