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CVE-2026-97931: Linux

7.0

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, при специфични условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ALSA: us122l: Prevent write upgrades for read mappings The hwdep mmap callback rejects read-buffer mappings that are initially writable, but leaves VM_MAYWRITE set on mappings created with PROT_READ. A process that can open the hwdep node O_RDWR can later use mprotect() to make the mapping writable. The read allocation begins with struct usb_stream. Its read_size member is used by the fault handler to decide which pages belong to the read buffer. The read VMA intentionally remains expandable because pcm_usb_stream uses mremap() after reading that size. Changing read_size first can therefore map and access pages beyond the allocation. The same member is also consumed by usb_stream_free(), where changing it can make free_pages_exact() release pages outside the allocation. Clear VM_MAYWRITE for read-buffer mappings after rejecting an initially writable VMA. This keeps the separate output-buffer mapping writable while preventing later permission upgrades.

    Засегнати продукти

    • Linux Linux: 030a07e441296c372f946cd4065b5d831d8dc40c преди cbc1f954ce67d739d41d1f0757d29850353ebb6a; 030a07e441296c372f946cd4065b5d831d8dc40c преди becb89036a1320ef0a77da2d27935ac0704345c4; 030a07e441296c372f946cd4065b5d831d8dc40c преди 6a5f5a5a32c78e67701f1d0f26bc87af68895604; 030a07e441296c372f946cd4065b5d831d8dc40c преди 938e8d6cee8d36f24669dfdcd3717e081eb32d64; 030a07e441296c372f946cd4065b5d831d8dc40c преди 64a87950239867682cde128020e1a47088295e5c; 030a07e441296c372f946cd4065b5d831d8dc40c преди d9c537b14f4982f17b103e3a2cfeee4bee6bc026; 030a07e441296c372f946cd4065b5d831d8dc40c преди 0eb9dd4774af0ac4d1fd105ef2b0a1f6cec06f2f; 030a07e441296c372f946cd4065b5d831d8dc40c преди 71c610aeb1770302ac9c9e0b9a4ecd37f1311928
    • Linux Linux: 2.6.28; преди 2.6.28; 5.10.271 до 5.10.*; 5.15.222 до 5.15.*; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.111 до 6.12.*; 6.18.53 до 6.18.*; 7.2.7 до 7.2.*; от 7.3 нататък

    История

    • 25 септември 2026 Публикувано

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