kernel: blk-cgroup: hold queue_lock when removing blkg->q_node

A locking flaw was found in the Linux kernel's block cgroup subsystem. When removing blkg-qnode from q-blkglist in blkgfreeworkfn, the code fails to hold queuelock. This missing lock allows concurrent access from blkgdestroyall, leading to list corruption and potential hard lockups...

kernel: sched/psi: Fix use-after-free in ep_remove_wait_queue()

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

kernel: block, bfq: fix possible uaf for 'bfqq->bic'

In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix possible uaf for 'bfqq-bic' Our test report a uaf for 'bfqq-bic' in 5.10: ================================================================== BUG: KASAN: use-after-free in bfqselectqueue+0x378/0xa30 CPU: 6 PID:...

runc: Rootless runc makes `/sys/fs/cgroup` writable

A flaw was found in runc, where it is vulnerable to a denial of service caused by improper access control in the /sys/fs/cgroup endpoint. This flaw allows a local authenticated attacker to cause a denial of service...

PT-2023-8295 · Linux +2 · Linux Kernel +2

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: A flaw was found in the blkgs destruction path in block/blk-cgroup.c, leading to a cgroup blkio memory leakage problem. When a cgroup is being destroyed, cgroup rstat flush is only...

use-after-free flaw found in cgroup1_parse_param (possible denial of service)

A use-after-free flaw was found in cgroup1parseparam in kernel/cgroup/cgroup-v1.c in the Linux kernel's cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service ...

SUSE-SU-2023:2989-1 Security update for conmon

This update for conmon fixes the following issues: conmon was updated to version 2.1.7: - Bumped go version to 1.19 bsc1209307. Bugfixes: - Fixed leaking symbolic links in the optsocketpath directory. - Fixed cgroup oom issues bsc1208737. - Fixed OOM watcher for cgroupv2 oomkill events...

PT-2023-36236 · Conmon · Conmon

Name of the Vulnerable Software and Affected Versions: conmon versions prior to 2.1.7 Description: The issue concerns conmon, where several bugs have been fixed, including leaking symbolic links in the opt socket path directory, cgroup oom issues, and OOM watcher for cgroupv2 oom kill events. The...

CLSA-2023-1686651204 kernel: Fix of 25 CVEs

cgroup: Use open-time cgroup namespace for process migration perm checks CVE-2021-4197 - cgroup: Use open-time credentials for process migraton perm checks CVE-2021-4197 - vt: drop old FONT ioctls CVE-2021-33656 - fbmem: Check virtual screen sizes in fbsetvar CVE-2021-33655 - fbcon: Prevent that...

CLSA-2023-1686585068 kernel: Fix of 26 CVEs

cgroup: Use open-time cgroup namespace for process migration perm checks CVE-2021-4197 - cgroup: Use open-time credentials for process migraton perm checks CVE-2021-4197 - cgroup: cgroup.procs,threads factor out common parts - cgroup: unify attach permission checking - vt: drop old FONT ioctls...

Amazon Linux 2023 : runc (ALAS2023-2023-208)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-208 advisory. runc is a CLI tool for spawning and running containers according to the OCI specification. In affected versions it was found that rootless runc makes /sys/fs/cgroup writable in following...

Important: runc

Issue Overview: runc is a CLI tool for spawning and running containers according to the OCI specification. In affected versions it was found that rootless runc makes /sys/fs/cgroup writable in following conditons: 1. when runc is executed inside the user namespace, and the config.json does not...

Important: runc

Issue Overview: runc is a CLI tool for spawning and running containers according to the OCI specification. In affected versions it was found that rootless runc makes /sys/fs/cgroup writable in following conditons: 1. when runc is executed inside the user namespace, and the config.json does not...

Important: runc

Issue Overview: runc is a CLI tool for spawning and running containers according to the OCI specification. In affected versions it was found that rootless runc makes /sys/fs/cgroup writable in following conditons: 1. when runc is executed inside the user namespace, and the config.json does not...

USN-6088-2: runC vulnerabilities

USN-6088-1 fixed vulnerabilities in runC. This update provides the corresponding updates for Ubuntu 16.04 LTS. It was discovered that runC incorrectly performed access control when mounting /proc to non-directories. An attacker could possibly use this issue to escalate privileges. CVE-2019-19921...

Ubuntu 16.04 ESM : runC vulnerabilities (USN-6088-2)

The remote Ubuntu 16.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6088-2 advisory. USN-6088-1 fixed vulnerabilities in runC. This update provides the corresponding updates for Ubuntu 16.04 LTS. It was discovered that runC incorrectly...

USN-6088-1 runc vulnerabilities

It was discovered that runC incorrectly made /sys/fs/cgroup writable when in rootless mode. An attacker could possibly use this issue to escalate privileges. CVE-2023-25809 It was discovered that runC incorrectly performed access control when mounting /proc to non-directories. An attacker could...

[SECURITY] Fedora 37 Update: rust-below-0.6.3-4.fc37

below is an interactive tool to view and record historical system data. It has support for: - information regarding hardware resource utilization - viewing the cgroup hierarchy - cgroup and process information - pressure stall information PSI - record mode to record system data - replay mode to...

kernel: bpf, cgroup: Fix kernel BUG in purge_effective_progs

In the Linux kernel, the following vulnerability has been resolved: bpf, cgroup: Fix kernel BUG in purgeeffectiveprogs Syzkaller reported a triggered kernel BUG as follows: ------------ cut here ------------ kernel BUG at kernel/bpf/cgroup.c:925! invalid opcode: 0000 1 PREEMPT SMP NOPTI CPU: 1 PI...

[SECURITY] Fedora 38 Update: rust-below-0.6.3-4.fc38

below is an interactive tool to view and record historical system data. It has support for: - information regarding hardware resource utilization - viewing the cgroup hierarchy - cgroup and process information - pressure stall information PSI - record mode to record system data - replay mode to...