Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: blk-iocost: Do not issue a warning if iocg was already offline. In iocgpaydebt, a warning is triggered if ‘activelist’ is empty. This is intended to confirm that iocg is active when it has debts. However, a warning can still be...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fixed the issue where the refcount of the subsystem for the @blockclass class was leaking. The blkcgfillrootiostats function iterates over the devices belonging to the @blockclass class using classdeviterinit|next, bu...

DEBIAN-CVE-2022-49786

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: properly pin the parent in blkcgcssonline blkcgcssonline is supposed to pin the blkcg of the parent, but 397c9f46ee4d refactored things and along the way, changed it to pin the css instead. This results in extra pins,...

UBUNTU-CVE-2022-49786

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: properly pin the parent in blkcgcssonline blkcgcssonline is supposed to pin the blkcg of the parent, but 397c9f46ee4d refactored things and along the way, changed it to pin the css instead. This results in extra pins,...

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

The vulnerability of the blkcgdeactivatepolicy function in the block/blk-cgroup.c module, which supports the block-level kernel in Linux, relates to the reutilization of previously released memory. Exploiting this vulnerability could allow an attacker to cause service failures...

blk-cgroup: Fix class @block_class's subsystem refcount leakage

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blk-cgroup: Fix UAF in blkcg_unpin_online()

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DEBIAN-CVE-2025-21745

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix class @blockclass's subsystem refcount leakage blkcgfillrootiostats iterates over @blockclass's devices by classdeviterinit|next, but does not end iterating with classdeviterexit, so causes the class's subsystem...

UBUNTU-CVE-2025-21745

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix class @blockclass's subsystem refcount leakage blkcgfillrootiostats iterates over @blockclass's devices by classdeviterinit|next, but does not end iterating with classdeviterexit, so causes the class's subsystem...

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 that stems from not properly ending device iterations in blk-cgroup, resulting in a subsystem reference count leak...

CLSA-2025-1739524909 Fix of 7 CVEs

CVE-url: https://ubuntu.com/security/CVE-2024-53104 - media: uvcvideo: Skip parsing frames of type UVCVSUNDEFINED in uvcparseformat CVE-url: https://ubuntu.com/security/CVE-2024-41020 - filelock: Fix fcntl/close race recovery compat path CVE-url: https://ubuntu.com/security/CVE-2024-43892 - memcg...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fixed a UAF in blkcgunpinonline. blkcgunpinonline traverses the blkcg hierarchy to set the object as online. To traverse this hierarchy, it uses blkcgparentblkcg, but this call occurs after blkcgDestroyBlksblkcg, whic...

The vulnerability of the blkcg_unpin_online() function in the block/blk-cgroup.c module of the Linux operating system allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the blkcgunpinonline function in the block/blk-cgroup.c module of the Linux kernel is related to the reutilization of previously released memory. Exploiting this vulnerability could allow an attacker to compromise the confidentiality, integrity, and accessibility of protected...

SUSE CVE-2024-56672

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix UAF in blkcgunpinonline blkcgunpinonline walks up the blkcg hierarchy putting the online pin. To walk up, it uses blkcgparentblkcg but it was calling that after blkcgdestroyblkgsblkcg which could free the blkcg,...

DEBIAN-CVE-2024-56672

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix UAF in blkcgunpinonline blkcgunpinonline walks up the blkcg hierarchy putting the online pin. To walk up, it uses blkcgparentblkcg but it was calling that after blkcgdestroyblkgsblkcg which could free the blkcg,...

AZL-54920 CVE-2024-56672 affecting package kernel for versions less than 6.6.76.1-1

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix UAF in blkcgunpinonline blkcgunpinonline walks up the blkcg hierarchy putting the online pin. To walk up, it uses blkcgparentblkcg but it was calling that after blkcgdestroyblkgsblkcg which could free the blkcg,...

UBUNTU-CVE-2024-56672

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix UAF in blkcgunpinonline blkcgunpinonline walks up the blkcg hierarchy putting the online pin. To walk up, it uses blkcgparentblkcg but it was calling that after blkcgdestroyblkgsblkcg which could free the blkcg,...

CVE-2024-56672

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix UAF in blkcgunpinonline blkcgunpinonline walks up the blkcg hierarchy putting the online pin. To walk up, it uses blkcgparentblkcg but it was calling that after blkcgdestroyblkgsblkcg which could free the blkcg,...

kernel: blk-cgroup: fix list corruption from reorder of WRITE ->lqueued

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix list corruption from reorder of WRITE -lqueued blkcgrstatflush can be run anytime, especially when blkcgroupbiostart is being executed. If WRITE of -lqueued is re-ordered with READ of 'bisc-lnode.next' in the loop...

kernel: Linux kernel: Denial of Service via NULL pointer dereference in blk-cgroup

A flaw was found in the Linux kernel's block cgroup blk-cgroup component. A local attacker could exploit a race condition in the blkcgactivatepolicy function, where block group policy data blkgpolicydata is installed before it is fully initialized. This allows another function, iocweightwrite, to...