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CVE-2026-23472: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: serial: core: fix infinite loop in handle_tx() for PORT_UNKNOWN uart_write_room() and uart_write() behave inconsistently when xmit_buf is NULL (which happens for PORT_UNKNOWN ports that were never properly initialized): - uart_write_room() returns kfifo_avail() which can be > 0 - uart_write() checks xmit_buf and returns 0 if NULL This inconsistency causes an infinite loop in drivers that rely on tty_write_room() to determine if they can write: while (tty_write_room(tty) > 0) { written = tty->ops->write(...); // written is always 0, loop never exits } For example, caif_serial's handle_tx() enters an infinite loop when used with PORT_UNKNOWN serial ports, causing system hangs. Fix by making uart_write_room() also check xmit_buf and return 0 if it's NULL, consistent with uart_write(). Reproducer: https://gist.github.com/mrpre/d9a694cc0e19828ee3bc3b37983fde13

    Засегнати продукти

    • Linux Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 91c2a5d201daf66fa3f42b8a383bb89174bde2c8; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди c9e845014723d552944cec4e146ec7b841cda34d; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди d45cfa70bf0159afb31cb03d2d16ec5a5053460c; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди efe85a557186b7fe915572ae93a8f3f78bfd9a22; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди bc70f2b36cf474d5cc8ecbcaf57f3e326fdec67c; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 455ce986fa356ff43a43c0d363ba95fa152f21d5
    • Linux Linux: 2.6.12; преди 2.6.12; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.20 до 6.18.*; 6.19.10 до 6.19.*; от 7.0 нататък

    История

    • 3 април 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-23472: Linux | freedomonline.bg