Linux kernel security vulnerabilities

A security vulnerability exists in the Linux kernel. It stems from the fact that seg6makeflowlabel fails to use skbgethashnet to obtain a network pointer. When an skb lacks both skb-dev and skb-sk, skbflowdissect triggers a warning due to the absence of a network pointer; this may result in null...

Linux kernel security vulnerabilities

A security vulnerability exists in Linux kernel version 4.14. It stems from the failure of the drm/fb-helper to delay initialization when fbdevprobe fails, resulting in an old modeset being submitted even when modeset-fb is empty, thereby triggering a WARNON!set-fb...

PT-2026-121909

In the Linux kernel, the following vulnerability has been resolved: perf/core: Check kernel access when kernel callchains are requested perf event open currently gates perf allow kernel only on !attr.exclude kernel. However, users can still request kernel callchain collection with attr.exclude...

PT-2026-121918

In the Linux kernel, the following vulnerability has been resolved: drm/vc4: Disable the V3D interrupt across runtime suspend vc4 irq disable masks the V3D interrupt sources and then calls synchronize irq before the V3D is powered down. However, by itself, this is not enough to quiesce the...

PT-2026-121922

In the Linux kernel, the following vulnerability has been resolved: flow dissector: avoid u16 truncation of hlen in bpf flow dissect bpf flow dissect sanitizes the offsets returned by the BPF program with clamp tu16, ..., hlen. If hlen is bigger than 65535, the upper bound is truncated before the...

PT-2026-121931

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix xattr replace when multiple xattrs are packed in the same item If we have a btrfs dir item item that packs multiple xattrs and then we replace the value of one of them with the setxattr2 family of syscalls with another...

PT-2026-121936

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the nvmet req alloc p2pmem sgls function where req-p2p dev is assigned only after both data and metadata SGL Scatter Gather List allocations succeed. If data allocatio...

PT-2026-121947

In the Linux kernel, the following vulnerability has been resolved: drm/vc4: Free the BO cache size list on teardown vc4 bo cache destroy purges the cached BOs but never frees the size list, leaking it on every unbind...

PT-2026-121949

In the Linux kernel, the following vulnerability has been resolved: cgroup/cpuset: Don't access cpuset cgrp subsys.root in is in v2 mode After seeing the patch 1 to guard is in v2 mode with RCU, it makes me realize that is in v2 mode may be called in a context where a new cgroup filesystem is bei...

PT-2026-121952

In the Linux kernel, the following vulnerability has been resolved: xfs: stop exchanging reflink flags when exchanging mappings When an exchange covers both files from offset 0 to i disk size, xmi can exchange reflink flags assumes every mapping moved and hands the reflink flag over to the other...

PT-2026-121955

In the Linux kernel, the following vulnerability has been resolved: namespace: never expire a locked mount Locked mounts are special. They protect the underlying files and directories from being revealed. do umount refuses to unmount locked mounts but shrink submounts doesn't. A shrinkable mount...

PT-2026-121958

In the Linux kernel, the following vulnerability has been resolved: namespace: unhash a dentry before detaching the mounts on it unlink, rmdir and rename remove the entry from the filesystem, call detach mounts on the entry with the inode locked and then call d delete once the inode is unlocked...

PT-2026-121973

In the Linux kernel, the following vulnerability has been resolved: fs: don't silently unmount busy mounts The propagate mount busy helper exists to decide whether a synchronous can suceed. It does that by looking at the copies of the victims in the mounts its parent propagates to. One of those...

PT-2026-121982

In the Linux kernel, the following vulnerability has been resolved: drm/i915/gt: Unmask interrupts only when ACTIVE is true There is a small race window between intel rps boost reading a stale ACTIVE state and queuing rps-work, where ACTIVE may be changed via asynchronous calls triggered by waker...

PT-2026-121984

In the Linux kernel, the following vulnerability has been resolved: drm/fb-helper: defer setup when fbdev probe fails, not just on -EAGAIN drm fb helper initial config and unlock calls drm client modeset probe first, which already fills in each mode set-mode/num connectors for every connected...

PT-2026-121985

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: Fix NULL tty dev dereference in rfcomm dev shutdown syzbot hit a NULL pointer dereference in rfcomm dev shutdown when an RFCOMM tty is closed. rfcomm dev add puts the new device on rfcomm dev list first and onl...

PT-2026-121992

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci sock: Serialize dead-device detachment Rebinding an HCI socket after its controller is unregistered can race monitor control replay and crash the kernel. hci sock bind clears hci pisk-hdev and drops the device...

PT-2026-121998

In the Linux kernel, the following vulnerability has been resolved: regulator: of: fill in supply names in of regulator bulk get all of regulator bulk get all returns an array it allocated itself, and fills in only the consumer of each entry. Every other way of getting a bulk array has the supply...

PT-2026-122013

In the Linux kernel, the following vulnerability has been resolved: dm: fix reading free memory in do resume When do resume calls dm table get modenew map, the call is done without holding any locks it only holds a reference to the md. It may be possible that another concurrent ioctl on the same...

PT-2026-122017

In the Linux kernel, the following vulnerability has been resolved: KEYS: Fix add key race with keyring restriction key create or update snapshots keyring-restrict link before taking the destination keyring's semaphore. keyring restrict installs a restriction while holding that semaphore. This...