In the Linux kernel, the following vulnerability has been resolved: mptcp: fix UaF in listener shutdown As reported by Christoph after having refactored the passive socket initialization, the mptcp listener shutdown path is prone to an UaF issue. BUG: KASAN: use-after-free in _raw_spin_lock_bh+0x73/0xe0 Write of size 4 at addr ffff88810cb23098 by task syz-executor731/1266 CPU: 1 PID: 1266 Comm: syz-executor731 Not tainted 6.2.0-rc59af4eaa31c1f6c00c8f1e448ed99a45c66340dd5 #6 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x6e/0x91 print_report+0x16a/0x46f kasan_report+0xad/0x130 kasan_check_range+0x14a/0x1a0 _raw_spin_lock_bh+0x73/0xe0 subflow_error_report+0x6d/0x110 sk_error_report+0x3b/0x190 tcp_disconnect+0x138c/0x1aa0 inet_child_forget+0x6f/0x2e0 inet_csk_listen_stop+0x209/0x1060 __mptcp_close_ssk+0x52d/0x610 mptcp_destroy_common+0x165/0x640 mptcp_destroy+0x13/0x80 __mptcp_destroy_sock+0xe7/0x270 __mptcp_close+0x70e/0x9b0 mptcp_close+0x2b/0x150 inet_release+0xe9/0x1f0 __sock_release+0xd2/0x280 sock_close+0x15/0x20 __fput+0x252/0xa20 task_work_run+0x169/0x250 exit_to_user_mode_prepare+0x113/0x120 syscall_exit_to_user_mode+0x1d/0x40 do_syscall_64+0x48/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc The msk grace period can legitly expire in between the last reference count dropped in mptcp_subflow_queue_clean() and the later eventual access in inet_csk_listen_stop() After the previous patch we don't need anymore special-casing msk listener socket cleanup: the mptcp worker will process each of the unaccepted msk sockets. Just drop the now unnecessary code. Please note this commit depends on the two parent ones: mptcp: refactor passive socket initialization mptcp: use the workqueue to destroy unaccepted sockets

vendor_unpatched cve-2023-53088: Unpatched CVEs for Ubuntu Linux (cve-2023-53088)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-1054 advisory.

    A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking     configuration (redirecting egress packets to ingress using TC action mirred) a local unprivileged user     could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a     retransmission, resulting in a denial of service condition. (CVE-2022-4269)

    A NULL pointer dereference has been discovered in the Linux Kernel, in io_file_bitmap_get in     io_uring/filetable.c. (CVE-2023-1583)

    A use-after-free flaw was found in btrfs_search_slot in fs/btrfs/ctree.c in btrfs in the Linux Kernel.This     flaw allows an attacker to crash the system and possibly cause a kernel information lea (CVE-2023-1611)

    An out-of-bounds write vulnerability was found in the Linux kernel's SLIMpro I2C device driver. The     userspace data->block[0] variable was not capped to a number between 0-255 and was used as the size of a     memcpy, possibly writing beyond the end of dma_buffer. This flaw could allow a local privileged user to     crash the system or potentially achieve code execution. (CVE-2023-2194)

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

    dm stats: check for and propagate alloc_percpu failure (CVE-2023-53044)

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

    dm crypt: add cond_resched() to dmcrypt_write() (CVE-2023-53051)

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

    erspan: do not use skb_mac_header() in ndo_start_xmit() (CVE-2023-53053)

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

    fscrypt: destroy keyring after security_sb_delete() (CVE-2023-53055)

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

    igb: revert rtnl_lock() that causes deadlock (CVE-2023-53060)

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

    perf/core: Fix perf_output_begin parameter is incorrectly invoked in perf_event_bpf_output     (CVE-2023-53065)

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

    mptcp: use the workqueue to destroy unaccepted sockets (CVE-2023-53072)

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

    perf/x86/amd/core: Always clear status for idx (CVE-2023-53073)

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

    xsk: Add missing overflow check in xdp_umem_reg (CVE-2023-53080)

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

    nfsd: don't replace page in rq_pages if it's a continuation of last page (CVE-2023-53083)

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

    mptcp: fix UaF in listener shutdown (CVE-2023-53088)

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

    tracing: Do not let histogram values have some modifiers (CVE-2023-53093)

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.

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