CVE-2025-21931

In the Linux kernel, the following vulnerability has been resolved: hwpoison, memoryhotplug: lock folio before unmap hwpoisoned folio Commit b15c87263a69 "hwpoison, memoryhotplug: allow hwpoisoned pages to be offlined add page poison checks in domigraterange in order to make offline hwpoisoned pa...

CVE-2025-21927

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix potential memory corruption in nvmetcprecvpdu nvmetcprecvpdu doesn't check the validity of the header length. When header digests are enabled, a target might send a packet with an invalid header length e.g. 255,...

CVE-2025-21917

In the Linux kernel, the following vulnerability has been resolved: usb: renesasusbhs: Flush the notifyhotplugwork When performing continuous unbind/bind operations on the USB drivers available on the Renesas RZ/G2L SoC, a kernel crash with the message "Unable to handle kernel NULL pointer...

CVE-2025-21922

In the Linux kernel, the following vulnerability has been resolved: ppp: Fix KMSAN uninit-value warning with bpf Syzbot caught an "KMSAN: uninit-value" warning 1, which is caused by the ppp driver not initializing a 2-byte header when using socket filter. The following code can generate a PPP...

CVE-2025-21914

In the Linux kernel, the following vulnerability has been resolved: slimbus: messaging: Free transaction ID in delayed interrupt scenario In case of interrupt delay for any reason, slimdotransfer returns timeout error but the transaction ID TID is not freed. This results into invalid memory acces...

CVE-2025-21898

In the Linux kernel, the following vulnerability has been resolved: ftrace: Avoid potential division by zero in functionstatshow Check whether denominator expression x x - 1 1000 mod 2^32, 2^64 produce zero and skip stddev computation in that case. For now don't care about rec-counter rec-counter...

CVE-2025-21901

In the Linux kernel, the following vulnerability has been resolved: RDMA/bnxtre: Add sanity checks on rdev validity There is a possibility that ulpirqstop and ulpirqstart callbacks will be called when the device is in detached state. This can cause a crash due to NULL pointer dereference as the...

CVE-2025-21903

In the Linux kernel, the following vulnerability has been resolved: mctp i3c: handle NULL header address daddr can be NULL if there is no neighbour table entry present, in that case the tx packet should be dropped. saddr will usually be set by MCTP core, but check for NULL in case a packet is...

CVE-2025-21899

In the Linux kernel, the following vulnerability has been resolved: tracing: Fix bad hist from corrupting namedtriggers list The following commands causes a crash: cd /sys/kernel/tracing/events/rcu/rcucallback echo 'hist:name=bad:keys=commonpid:onmaxbogus.savecommonpid' trigger bash: echo: write...

CVE-2025-21900

In the Linux kernel, the following vulnerability has been resolved: NFSv4: Fix a deadlock when recovering state on a sillyrenamed file If the file is sillyrenamed, and slated for delete on close, it is possible for a server reboot to triggeer an open reclaim, with can again race with the...

CVE-2025-21895

In the Linux kernel, the following vulnerability has been resolved: perf/core: Order the PMU list to fix warning about unordered pmuctxlist Syskaller triggers a warning due to prevepc-pmu != nextepc-pmu in perfeventswaptaskctxdata. vmcore shows that two lists have the same perfeventpmucontext, bu...

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...