In the Linux kernel, the following vulnerability has been resolved: freezer,umh: Fix call_usermode_helper_exec() vs SIGKILL Tetsuo-San noted that commit f5d39b020809 ("freezer,sched: Rewrite core freezer logic") broke call_usermodehelper_exec() for the KILLABLE case. Specifically it was missed that the second, unconditional, wait_for_completion() was not optional and ensures the on-stack completion is unused before going out-of-scope.

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: freezer,umh: Fix     call_usermode_helper_exec() vs SIGKILL Tetsuo-San noted that commit f5d39b020809 (freezer,sched: Rewrite     core freezer logic) broke call_usermodehelper_exec() for the KILLABLE case. Specifically it was missed     that the second, unconditional, wait_for_completion() was not optional and ensures the on-stack completion     is unused before going out-of-scope. (CVE-2023-52704)

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 ALAS2023-2023-127 advisory.

    A regression exists in the Linux Kernel within KVM: nVMX that allowed for speculative execution attacks.
    L2 can carry out Spectre v2 attacks on L1 due to L1 thinking it doesn't need retpolines or IBPB after     running L2 due to KVM (L0) advertising eIBRS support to L1. An attacker at L2 with code execution can     execute code on an indirect branch on the host machine. We recommend upgrading to Kernel 6.2 or past     commit 2e7eab81425a (CVE-2022-2196)

    Detected a few exploitable gadgets that could leak secret memory through a side-channel such as MDS as     well as insufficient hardening of the usercopy functions against spectre-v1. (CVE-2023-0458)

    Use After Free vulnerability in Linux kernel traffic control index filter (tcindex) allows Privilege     Escalation. The imperfect hash area can be updated while packets are traversing, which will cause a use-     after-free when 'tcf_exts_exec()' is called with the destroyed tcf_ext. A local attacker user can use this     vulnerability to elevate its privileges to root.This issue affects Linux Kernel: from 4.14 before git     commit ee059170b1f7e94e55fa6cadee544e176a6e59c2. (CVE-2023-1281)

    In the Linux kernel before 6.1.13, there is a double free in net/mpls/af_mpls.c upon an allocation failure     (for registering the sysctl table under a new location) during the renaming of a device. (CVE-2023-26545)

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

    aio: fix mremap after fork null-deref (CVE-2023-52646)

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

    net: use a bounce buffer for copying skb->mark (CVE-2023-52701)

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

    net: openvswitch: fix possible memory leak in ovs_meter_cmd_set() (CVE-2023-52702)

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

    freezer,umh: Fix call_usermode_helper_exec() vs SIGKILL (CVE-2023-52704)

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

    sched/psi: Fix use-after-free in ep_remove_wait_queue() (CVE-2023-52707)

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

    fbdev: Fix invalid page access after closing deferred I/O devices (CVE-2023-52731)

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

    ceph: blocklist the kclient when receiving corrupted snap trace (CVE-2023-52732)

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

    bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself (CVE-2023-52735)

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

    btrfs: lock the inode in shared mode before starting fiemap (CVE-2023-52737)

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

    ext4: Fix function prototype mismatch for ext4_feat_ktype (CVE-2023-53224)

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
226242	Linux Distros Unpatched Vulnerability : CVE-2023-52704	Nessus	Misc.	Local	medium
173158	Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2023-127)	Nessus	Amazon Linux Local Security Checks	Local	high

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CVE-2023-52704

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