Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: - block: Fixed a issue where rq-qos\donebio was skipped if BIOTRACKED was not set. As a result, bioendio now skips rqqosdonebio if BIOTRACKED is not set. While this fixed a potential error, it also caused issues with blk-iocos...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: blk-iocost: Use spinlockirqsave in adjustinuseandcalccost. The adjustinuseandcalccost function uses spinlockirq, and IRQ will be enabled when unlocking. A DEADLOCK may occur if other locks are held and IRQs are disabled before...

Astra Linux – Vulnerability in Linux 5.10, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: blk-iocost: fixed the divide by 0 error in calclcoefs The issue arises when the value of u64 type is used in the DIVROUNDUPULL operation. A divide by 0 error can occur if bps plus IOCPAGESIZE is greater than ULLONGMAX. This could...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: iocost: Fixed the issue of dividing by zero when calculating donations from cgroups with an active hweight of less than 2. The donation calculation logic assumes that the donor will have a non-zero hweight after the donation...

Unity Linux 20.1070a Security Update: kernel (UTSA-2026-013521)

"The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013521 advisory. In the Linux kernel, the following vulnerability has been resolved: block: don't allow the same type rqqos add more than once In our test of iocost, we encountered...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-013797)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013797 advisory. In the Linux kernel, the following vulnerability has been resolved: blk-iocost: fix divide by 0 error in calclcoefs echo max of u64 to cost.model can cause divide by...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-011346)

"The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-011346 advisory. In the Linux kernel, the following vulnerability has been resolved: block: don't allow the same type rqqos add more than once In our test of iocost, we encountered...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-010777)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-010777 advisory. In the Linux kernel, the following vulnerability has been resolved: blk-iocost: fix divide by 0 error in calclcoefs echo max of u64 to cost.model can cause divide by...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992752)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-992752 advisory. In the Linux kernel, the following vulnerability has been resolved: blkiocost: fix more out of bound shifts Recently running UBSAN caught few out of bound shifts in...

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-2023-53783

In the Linux kernel, the following vulnerability has been resolved: blk-iocost: fix divide by 0 error in calclcoefs echo max of u64 to cost.model can cause divide by 0 error. echo 8:0 rbps=18446744073709551615 /sys/fs/cgroup/io.cost.model divide error: 0000 1 PREEMPT SMP RIP:...

SUSE CVE-2023-53783

In the Linux kernel, the following vulnerability has been resolved: blk-iocost: fix divide by 0 error in calclcoefs echo max of u64 to cost.model can cause divide by 0 error. echo 8:0 rbps=18446744073709551615 /sys/fs/cgroup/io.cost.model divide error: 0000 1 PREEMPT SMP RIP:...

Linux Distros Unpatched Vulnerability : CVE-2023-53783

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - blk-iocost: fix divide by 0 error in calclcoefs echo max of u64 to cost.model can cause divide by 0 error. echo 8:0 rbps=18446744073709551615...

EUVD-2023-60123

In the Linux kernel, the following vulnerability has been resolved: blk-iocost: fix divide by 0 error in calclcoefs echo max of u64 to cost.model can cause divide by 0 error. echo 8:0 rbps=18446744073709551615 /sys/fs/cgroup/io.cost.model divide error: 0000 1 PREEMPT SMP RIP:...

CVE-2023-53823

CVE-2023-53823 concerns a Linux kernel vulnerability in rq_qos synchronization that was fixed by adding a disk-level mutex (rq_qos_mutex) to protect rq_qos_exit() and related interactions with iocost/iolatency and blkcg policies. The bug stemmed from potential concurrent access to q->rq_qos du...

DEBIAN-CVE-2023-53783

In the Linux kernel, the following vulnerability has been resolved: blk-iocost: fix divide by 0 error in calclcoefs echo max of u64 to cost.model can cause divide by 0 error. echo 8:0 rbps=18446744073709551615 /sys/fs/cgroup/io.cost.model divide error: 0000 1 PREEMPT SMP RIP:...

CVE-2023-53783

In the Linux kernel, the following vulnerability has been resolved: blk-iocost: fix divide by 0 error in calclcoefs echo max of u64 to cost.model can cause divide by 0 error. echo 8:0 rbps=18446744073709551615 /sys/fs/cgroup/io.cost.model divide error: 0000 1 PREEMPT SMP RIP:...

CVE-2023-53783 blk-iocost: fix divide by 0 error in calc_lcoefs()

In the Linux kernel, the following vulnerability has been resolved: blk-iocost: fix divide by 0 error in calclcoefs echo max of u64 to cost.model can cause divide by 0 error. echo 8:0 rbps=18446744073709551615 /sys/fs/cgroup/io.cost.model divide error: 0000 1 PREEMPT SMP RIP:...

CVE-2023-53783

The CVE-2023-53783 issue affects the Linux kernel’s blk-iocost cost model: calc_lcoefs() can divide by zero when the input cost.model overflows ULLONG_MAX, triggered by large values (e.g., echoing a max u64 to /sys/fs/cgroup/io.cost.model). The root cause is an overflow in DIV_ROUND_UP_ULL used i...