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CVE-2026-53181: 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: vsock/vmci: fix sk_ack_backlog leak on failed handshake When vmci_transport_recv_connecting_server() returns an error, vmci_transport_recv_listen() calls vsock_remove_pending() but never calls sk_acceptq_removed(). This leaves sk_ack_backlog incremented permanently. Repeated handshake failures (malformed packets, queue pair alloc failure, event subscribe failure) cause sk_ack_backlog to climb toward sk_max_ack_backlog. Once it reaches the limit the listener permanently refuses all new connections with -ECONNREFUSED, a silent denial of service requiring a process restart to recover. The two existing sk_acceptq_removed() calls in af_vsock.c do not cover this path: line 764 checks vsock_is_pending() which returns false after vsock_remove_pending(), and line 1889 is only reached on successful accept(). Fix by balancing sk_acceptq_added() with sk_acceptq_removed() on the error path.

    Засегнати продукти

    • Linux Linux: d021c344051af91f42c5ba9fdedc176740cbd238 преди 22c587aa3ab1ab5264daff3ec32136fd30436c13; d021c344051af91f42c5ba9fdedc176740cbd238 преди cf7090e255d74c4b61c51f8ede9fcacdd8393b5b; d021c344051af91f42c5ba9fdedc176740cbd238 преди ea0b03d52881c12a8c634ea0d6cbfa61cefdb488; d021c344051af91f42c5ba9fdedc176740cbd238 преди dfd853197615d322d3a88dbcab91fc0fd2096219; d021c344051af91f42c5ba9fdedc176740cbd238 преди bcb275626055df7f8f947f1a349754b4004d9a15; d021c344051af91f42c5ba9fdedc176740cbd238 преди ba9ad6015937a5e46ba1a31370e3efdec8abbdcc; d021c344051af91f42c5ba9fdedc176740cbd238 преди 9698582a4dd9c4a05889d7db96d4c0edc9e69cac; d021c344051af91f42c5ba9fdedc176740cbd238 преди c05fa14db43ebef3bd862ca9d073981c0358b3f0
    • Linux Linux: 3.9; преди 3.9; 5.10.259 до 5.10.*; 5.15.210 до 5.15.*; 6.1.176 до 6.1.*; 6.6.143 до 6.6.*; 6.12.94 до 6.12.*; 6.18.36 до 6.18.*; 7.0.13 до 7.0.*; от 7.1 нататък
    • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: всички версии

    История

    • 25 юни 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-53181: Linux | freedomonline.bg