SUSE-SU-2026:20570-1 Security update for the Linux Kernel

The SUSE Linux Enterprise 16.0 and SL MIxro 6.2 kernel was updated to fix various security issues The following security issues were fixed: - CVE-2025-40147: blk-throttle: fix access race during throttle policy activation bsc1253344. - CVE-2025-40257: mptcp: fix a race in mptcppmdeladdtimer...

UBUNTU-CVE-2026-23148

In the Linux kernel, the following vulnerability has been resolved: nvmet: fix race in nvmetbiodone leading to NULL pointer dereference There is a race condition in nvmetbiodone that can cause a NULL pointer dereference in blkcgroupbiostart: 1. nvmetbiodone is called when a bio completes 2...

CVE-2026-23148 nvmet: fix race in nvmet_bio_done() leading to NULL pointer dereference

In the Linux kernel, the following vulnerability has been resolved: nvmet: fix race in nvmetbiodone leading to NULL pointer dereference There is a race condition in nvmetbiodone that can cause a NULL pointer dereference in blkcgroupbiostart: 1. nvmetbiodone is called when a bio completes 2...

SUSE-SU-2026:0472-1 Security update for the Linux Kernel

The SUSE Linux Enterprise 15 SP7 Azure kernel was updated to fix various security issues The following security issues were fixed: - CVE-2023-54013: interconnect: Fix locking for runpm vs reclaim bsc1256280. - CVE-2025-39880: libceph: fix invalid accesses to cephconnectionv1info bsc1250388. -...

The vulnerability of the blkcg_activate_policy() function in the block/blk-cgroup.c module, which supports the block-level kernel in the Linux operating system, allows a hacker to trigger a service failure.

The vulnerability of the blkcgactivatepolicy function in the block/blk-cgroup.c module, which supports the block-level kernel in the Linux operating system, is related to the pointer manipulation. Exploiting this vulnerability could allow an attacker to cause service failures...

Azure Linux 3.0 Security Update: kernel (CVE-2025-21745)

The version of kernel installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-21745 advisory. - In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix class @blockclass's...

ROS-20260119-7348

A vulnerability in the block/blk-cgroup.c component of the Linux operating system kernel is related to improper memory freeing before deleting the last link. Exploitation of the vulnerability could allow an attacker to cause a denial of service...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-001156)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001156 advisory. The blkcginitqueue function in block/blk-cgroup.c in the Linux kernel before 4.11 allows local users to cause a denial of service double free or possibly have...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-003503)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-003503 advisory. The blkcginitqueue function in block/blk-cgroup.c in the Linux kernel before 4.11 allows local users to cause a denial of service double free or possibly have...

SUSE CVE-2023-54271

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix NULL deref caused by blkgpolicydata being installed before init blk-iocost sometimes causes the following crash: BUG: kernel NULL pointer dereference, address: 00000000000000e0 ... RIP: 0010:rawspinlock+0x17/0x30...

EUVD-2023-60370

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix NULL deref caused by blkgpolicydata being installed before init blk-iocost sometimes causes the following crash: BUG: kernel NULL pointer dereference, address: 00000000000000e0 ... RIP: 0010:rawspinlock+0x17/0x30...

CVE-2023-54271

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix NULL deref caused by blkgpolicydata being installed before init blk-iocost sometimes causes the following crash: BUG: kernel NULL pointer dereference, address: 00000000000000e0 ... RIP: 0010:rawspinlock+0x17/0x30...

CVE-2023-54271

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix NULL deref caused by blkgpolicydata being installed before init blk-iocost sometimes causes the following crash: BUG: kernel NULL pointer dereference, address: 00000000000000e0 ... RIP: 0010:rawspinlock+0x17/0x30...

CVE-2023-54271

CVE-2023-54271 concerns a NULL pointer dereference in the Linux kernel related to block cgroup handling. The issue arises when blkcg_activate_policy installs blkg_policy_data before ioc_weight policy data is fully initialized, causing a race with ioc_weight_write() that can encounter an uninitial...

CVE-2023-54271 blk-cgroup: Fix NULL deref caused by blkg_policy_data being installed before init

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix NULL deref caused by blkgpolicydata being installed before init blk-iocost sometimes causes the following crash: BUG: kernel NULL pointer dereference, address: 00000000000000e0 ... RIP: 0010:rawspinlock+0x17/0x30...

CVE-2023-54271

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix NULL deref caused by blkgpolicydata being installed before init blk-iocost sometimes causes the following crash: BUG: kernel NULL pointer dereference, address: 00000000000000e0 ... RIP: 0010:rawspinlock+0x17/0x30...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in Linux kernel, which stems from the installation of blkgpolicydata in blk-cgroup before initialization, which could lead to a null pointer...

SUSE CVE-2023-54107

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: dropping parent refcount after pdfreefn is done Some cgroup policies will access parent pd through child pd even after pdofflinefn is done. If pdfreefn for parent is called before child, then UAF can be triggered. Hen...

EUVD-2023-60338

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: dropping parent refcount after pdfreefn is done Some cgroup policies will access parent pd through child pd even after pdofflinefn is done. If pdfreefn for parent is called before child, then UAF can be triggered. Hen...

EUVD-2023-60357

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: hold queuelock when removing blkg-qnode When blkg is removed from q-blkglist from blkgfreeworkfn, queuelock has to be held, otherwise, all kinds of bugslist corruption, hard lockup, .. can be triggered from...