Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: rustbinder: The spinlock call in rustshrinkfreepage has been removed. When porting Rust Binder to version 6.18, I overlooked including the commit fb56fdf8b9a2 “mm/listlru: split the lock to per-cgroup scope” in the consideration...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: cgroup: Use separate source/destination nodes when preloading csssets for migration. Each cssset is associated with its corresponding tasks. When moving tasks between csssets during a migration, we need to keep the source and...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: perf: Fixed list corruption in perfcgroupswitch. There is list corruption in cgrpcpuctxlist. This occurs at the following path: perfcgroupswitch: listforeachentrycgrpcpuctxlist cpuctxschedin ctxschedin ctxpinnedschedin...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: cgroup/cpuset: The incorrect check in updateparentsubpartscpumask has been fixed. It was discovered that the check to determine whether a partition can use all the CPUs from the parent cpuset in updateparentsubpartscpumask was...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: The parent reference count is dropped after pdfreefn is called. Some cgroup policies will access the parent PD through the child PD even after pdofflinefn is called. If pdfreefn for the parent is called before that fo...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: blk-cgroup: fixed a UAF vulnerability by acquiring the blkcg lock before destroying the blkg. KASAN reports a use-after-free issue during the fuzz test: 693354.104835...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: The queuelock must be held when removing blkg-qnode. When blkg is removed from q-blkglist in the blkgfreeworkfn function, the queuelock must be held. Otherwise, various bugs such as list corruption, hard lockups, etc...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mm: zswap: fixed a NULL crash in the shrinker function when cgroupdisable=memory is set. Christian reported a NULL dereference in zswap; he was able to trace the issue back to the zswap shrinker function. This issue also appeared...

Astra Linux – Vulnerability in Linux, Linux 5.10

A memory overflow vulnerability was discovered in the ipc functionality of the memcg subsystem in the Linux kernel. This vulnerability occurs when a user calls the semget function multiple times, thereby creating semaphores. This flaw allows a local user to deplete resources, resulting in a denia...

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...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: In mptcp, the task of cleaning up subflows has been moved to mptcpDestroyCommon. If the creation of a mptcp socket fails due to the CGROUPINETSOCKCREATE eBPF program, the MPTCP protocol ends up leaking all subflows. This related...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: cgroup: The cgroupgetfromid function must check that the looked-up key is a directory. The cgroup object must be a kernfs directory; otherwise, a kernel panic will occur, especially when the cgroup ID is provided from the user...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: A bug related to the missing hugetlblock during resv uncharge has been fixed. There is a recent report regarding the use of UFFDIOCOPY over hugetlb: https://loreKernel.org/all/[email protected]/...

Astra Linux – Vulnerability in Linux, Linux 5.10

A vulnerability was discovered in the cgroupreleaseagentwrite function of the Linux kernel, within the kernel/cgroup/cgroup-v1.c file. Under certain circumstances, this flaw allows the use of the cgroups v1 releaseagent feature to escalate privileges and bypass namespace isolation unexpectedly...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: cgroup/dmem: Fixed a NULL pointer derefrence issue when setting the max value. The following issue was triggered: BUG: NULL pointer derefrence in the kernel; Address: 0000000000000000 PF: Supervisor read access in kernel mode...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: Block layer: Fixed corruption of q-blkglist during disk rebinding. Multiple instances of the gendisk function can be allocated/added for a single request queue during disk rebinding. As a result, blkg may still remain in q-blkgli...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: ovl: fixed the warning in ovlcreatereal Syzbot triggered the following warning in ovlworkdircreate - ovlcreatereal: if !err && WARNON!newdentry-d inode The reason is that the cgroup2 filesystem returns from mkdir without...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: bfq: Update cgroup information before merging bio When the process is migrated to a different cgroup or, in the case of writeback, it simply starts submitting bios associated with a different cgroup, bfqmergebio may operate with...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15

In the Linux kernel, the following vulnerability has been resolved: sched/psi: Fixed a use-after-free in epremovewaitqueue If a non-root cgroup is removed while there is a thread that registered a trigger and is polling on a pressure file within the cgroup, the polling waitqueue will be freed in...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: schedext: Redundant cssput calls have been removed from scxcgroupinit. The iterator cssforeachdescendantpre iterates through the cgroup hierarchy under cgrouplock. This iteration does not increment the reference counts of css...