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

  - tty: fix deadlock caused by calling printk() under tty_port->lock pty_write() invokes kmalloc() which may     invoke a normal printk() to print failure message. This can cause a deadlock in the scenario reported by     syz-bot below: CPU0 CPU1 CPU2 ---- ---- ---- lock(console_owner); lock(&port_lock_key); lock(&port->lock);
    lock(&port_lock_key); lock(&port->lock); lock(console_owner); As commit dbdda842fe96 (printk: Add console     owner and waiter logic to load balance console writes) said, such deadlock can be prevented by using     printk_deferred() in kmalloc() (which is invoked in the section guarded by the port->lock). But there are     too many printk() on the kmalloc() path, and kmalloc() can be called from anywhere, so changing printk()     to printk_deferred() is too complicated and inelegant. Therefore, this patch chooses to specify
    __GFP_NOWARN to kmalloc(), so that printk() will not be called, and this deadlock problem can be avoided.
    Syzbot reported the following lockdep error: ======================================================     WARNING: possible circular locking dependency detected 5.4.143-00237-g08ccc19a-dirty #10 Not tainted
    ------------------------------------------------------ syz-executor.4/29420 is trying to acquire lock:
    ffffffff8aedb2a0 (console_owner){....}-{0:0}, at: console_trylock_spinning kernel/printk/printk.c:1752     [inline] ffffffff8aedb2a0 (console_owner){....}-{0:0}, at: vprintk_emit+0x2ca/0x470     kernel/printk/printk.c:2023 but task is already holding lock: ffff8880119c9158 (&port->lock){-.-.}-{2:2},     at: pty_write+0xf4/0x1f0 drivers/tty/pty.c:120 which lock already depends on the new lock. the existing     dependency chain (in reverse order) is: -> #2 (&port->lock){-.-.}-{2:2}: __raw_spin_lock_irqsave     include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x35/0x50     kernel/locking/spinlock.c:159 tty_port_tty_get drivers/tty/tty_port.c:288 [inline] <-- lock(&port->lock);
    tty_port_default_wakeup+0x1d/0xb0 drivers/tty/tty_port.c:47 serial8250_tx_chars+0x530/0xa80     drivers/tty/serial/8250/8250_port.c:1767 serial8250_handle_irq.part.0+0x31f/0x3d0     drivers/tty/serial/8250/8250_port.c:1854 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1827     [inline] <-- lock(&port_lock_key); serial8250_default_handle_irq+0xb2/0x220     drivers/tty/serial/8250/8250_port.c:1870 serial8250_interrupt+0xfd/0x200     drivers/tty/serial/8250/8250_core.c:126 __handle_irq_event_percpu+0x109/0xa50 kernel/irq/handle.c:156     [...] -> #1 (&port_lock_key){-.-.}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110     [inline] _raw_spin_lock_irqsave+0x35/0x50 kernel/locking/spinlock.c:159     serial8250_console_write+0x184/0xa40 drivers/tty/serial/8250/8250_port.c:3198 <-- lock(&port_lock_key);
    call_console_drivers kernel/printk/printk.c:1819 [inline] console_unlock+0x8cb/0xd00     kernel/printk/printk.c:2504 vprintk_emit+0x1b5/0x470 kernel/printk/printk.c:2024 <-- lock(console_owner);
    vprintk_func+0x8d/0x250 kernel/printk/printk_safe.c:394 printk+0xba/0xed kernel/printk/printk.c:2084     register_console+0x8b3/0xc10 kernel/printk/printk.c:2829 univ8250_console_init+0x3a/0x46     drivers/tty/serial/8250/8250_core.c:681 console_init+0x49d/0x6d3 kernel/printk/printk.c:2915     start_kernel+0x5e9/0x879 init/main.c:713 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241 ->     #0 (console_owner){....}-{0:0}: [...] lock_acquire+0x127/0x340 kernel/locking/lockdep.c:4734     console_trylock_spinning kernel/printk/printk.c:1773 ---truncated--- (CVE-2022-49441)

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

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Linux Distros Unpatched Vulnerability : CVE-2022-49441

medium Nessus Plugin ID 225673

Version 1.13

Version 1.12

Version 1.11

Version 1.10

Version 1.5

Version 1.3

Version 1.2

Version 1.1

Version 1.13 Jan 15, 2026, 2:04 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202601151404
Version 1.12 Jan 10, 2026, 4:14 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202601100414
Version 1.11 Nov 26, 2025, 1:15 PM Detection (updated detection logic) Plugin Feed: 202511261315
Version 1.10 Oct 27, 2025, 3:15 PM CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:U/RL:U/RC:C") CVSS temporal metrics ("CVSSv3 temporal vector" set to "CVSS:3.0/E:U/RL:U/RC:C") Detection (updated detection logic) Plugin Feed: 202510271515
Version 1.5 Sep 14, 2025, 2:50 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202509141450
Version 1.3 Aug 31, 2025, 7:32 PM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin metadata Plugin Feed: 202508311932
Version 1.2 Aug 15, 2025, 7:38 PM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin metadata Plugin Feed: 202508151938
Version 1.1 Mar 5, 2025, 4:35 PM New Plugin Feed: 202503051635