In the Linux kernel, the following vulnerability has been resolved: cgroup,freezer: hold cpu_hotplug_lock before freezer_mutex syzbot is reporting circular locking dependency between cpu_hotplug_lock and freezer_mutex, for commit f5d39b020809 ("freezer,sched: Rewrite core freezer logic") replaced atomic_inc() in freezer_apply_state() with static_branch_inc() which holds cpu_hotplug_lock. cpu_hotplug_lock => cgroup_threadgroup_rwsem => freezer_mutex cgroup_file_write() { cgroup_procs_write() { __cgroup_procs_write() { cgroup_procs_write_start() { cgroup_attach_lock() { cpus_read_lock() { percpu_down_read(&cpu_hotplug_lock); } percpu_down_write(&cgroup_threadgroup_rwsem); } } cgroup_attach_task() { cgroup_migrate() { cgroup_migrate_execute() { freezer_attach() { mutex_lock(&freezer_mutex); (...snipped...) } } } } (...snipped...) } } } freezer_mutex => cpu_hotplug_lock cgroup_file_write() { freezer_write() { freezer_change_state() { mutex_lock(&freezer_mutex); freezer_apply_state() { static_branch_inc(&freezer_active) { static_key_slow_inc() { cpus_read_lock(); static_key_slow_inc_cpuslocked(); cpus_read_unlock(); } } } mutex_unlock(&freezer_mutex); } } } Swap locking order by moving cpus_read_lock() in freezer_apply_state() to before mutex_lock(&freezer_mutex) in freezer_change_state().

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - In the Linux kernel, the following vulnerability has been resolved: cgroup,freezer: hold cpu_hotplug_lock     before freezer_mutex syzbot is reporting circular locking dependency between cpu_hotplug_lock and     freezer_mutex, for commit f5d39b020809 (freezer,sched: Rewrite core freezer logic) replaced atomic_inc()     in freezer_apply_state() with static_branch_inc() which holds cpu_hotplug_lock. cpu_hotplug_lock =>     cgroup_threadgroup_rwsem => freezer_mutex cgroup_file_write() { cgroup_procs_write() {
    __cgroup_procs_write() { cgroup_procs_write_start() { cgroup_attach_lock() { cpus_read_lock() {     percpu_down_read(&cpu_hotplug_lock); } percpu_down_write(&cgroup_threadgroup_rwsem); } }     cgroup_attach_task() { cgroup_migrate() { cgroup_migrate_execute() { freezer_attach() {     mutex_lock(&freezer_mutex); (...snipped...) } } } } (...snipped...) } } } freezer_mutex =>     cpu_hotplug_lock cgroup_file_write() { freezer_write() { freezer_change_state() {     mutex_lock(&freezer_mutex); freezer_apply_state() { static_branch_inc(&freezer_active) {     static_key_slow_inc() { cpus_read_lock(); static_key_slow_inc_cpuslocked(); cpus_read_unlock(); } } }     mutex_unlock(&freezer_mutex); } } } Swap locking order by moving cpus_read_lock() in freezer_apply_state()     to before mutex_lock(&freezer_mutex) in freezer_change_state(). (CVE-2023-53522)

Note that Nessus relies on the presence of the package as reported by the vendor.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-169 advisory.

    An out-of-bounds memory access flaw was found in the Linux kernel's XFS file system in how a user restores     an XFS image after failure (with a dirty log journal). This flaw allows a local user to crash or     potentially escalate their privileges on the system. (CVE-2023-2124)

    In the Linux kernel, the following vulnerability has been resolved:

    skbuff: Fix a race between coalescing and releasing SKBs (CVE-2023-53186)

    In the Linux kernel, the following vulnerability has been resolved:

    net: openvswitch: fix race on port output (CVE-2023-53188)

    In the Linux kernel, the following vulnerability has been resolved:

    raw: Fix NULL deref in raw_get_next(). (CVE-2023-53198)

    In the Linux kernel, the following vulnerability has been resolved:

    nfsd: call op_release, even when op_func returns an error (CVE-2023-53241)

    In the Linux kernel, the following vulnerability has been resolved:

    Drivers: vmbus: Check for channel allocation before looking up relids (CVE-2023-53273)

    In the Linux kernel, the following vulnerability has been resolved:

    sctp: check send stream number after wait_for_sndbuf (CVE-2023-53296)

    In the Linux kernel, the following vulnerability has been resolved:

    sctp: fix a potential overflow in sctp_ifwdtsn_skip (CVE-2023-53372)

    In the Linux kernel, the following vulnerability has been resolved:

    tracing: Free error logs of tracing instances (CVE-2023-53375)

    In the Linux kernel, the following vulnerability has been resolved:

    cgroup,freezer: hold cpu_hotplug_lock before freezer_mutex (CVE-2023-53522)

    In the Linux kernel, the following vulnerability has been resolved:

    RDMA/cma: Allow UD qp_type to join multicast only (CVE-2023-53525)

    In the Linux kernel, the following vulnerability has been resolved:

    mm/swap: fix swap_info_struct race between swapoff and get_swap_pages() (CVE-2023-53623)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf, arm64: Fixed a BTI error on returning to patched function (CVE-2023-53634)

    In the Linux kernel, the following vulnerability has been resolved:

    NFSD: Avoid calling OPDESC() with ops->opnum == OP_ILLEGAL (CVE-2023-53680)

    In the Linux kernel, the following vulnerability has been resolved:

    netlink: annotate lockless accesses to nlk->max_recvmsg_len (CVE-2023-53824)

    In the Linux kernel, the following vulnerability has been resolved:

    ping: Fix potentail NULL deref for /proc/net/icmp. (CVE-2023-53987)

    In the Linux kernel, the following vulnerability has been resolved:

    RDMA/core: Fix GID entry ref leak when create_ah fails (CVE-2023-54003)

    In the Linux kernel, the following vulnerability has been resolved:

    io_uring: fix memory leak when removing provided buffers (CVE-2023-54041)

    In the Linux kernel, the following vulnerability has been resolved:

    fs: drop peer group ids under namespace lock (CVE-2023-54128)

    In the Linux kernel, the following vulnerability has been resolved:

    mptcp: stricter state check in mptcp_worker (CVE-2023-54176)

    In the Linux kernel, the following vulnerability has been resolved:

    drm/i915: fix race condition UAF in i915_perf_add_config_ioctl (CVE-2023-54202)

    In the Linux kernel, the following vulnerability has been resolved:

    ipv6: Fix an uninit variable access bug in __ip6_make_skb() (CVE-2023-54265)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
269554	Linux Distros Unpatched Vulnerability : CVE-2023-53522	Nessus	Misc.	Local	high
175085	Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2023-169)	Nessus	Amazon Linux Local Security Checks	Local	high

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