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CVE-2026-89489: Linux

7.8

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, без особени условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: openrisc: fix arbitrary kernel memory access via or1k_atomic syscall sys_or1k_atomic() (syscall 244 in the "or1k" ABI) takes two user pointers, v1 and v2, and swaps the words they point to in hand-written assembly. l.lwz r29,0(r4) l.lwz r27,0(r5) l.sw 0(r4),r27 l.sw 0(r5),r29 The pointers are not checked with access_ok(). The four memory accesses also have no exception table entries. A caller passes a kernel address as either pointer, and the syscall reads from and writes to it directly. This gives an unprivileged process a kernel read/write primitive. It overwrites kernel data such as the sys_call_table, gaining code execution in kernel context. Check both pointers before entering the critical section. Add fixups for the four memory accesses so faults on valid but unmapped user addresses return -EFAULT. [[email protected]: fix comment style]

    Засегнати продукти

    • Linux Linux: 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a преди bf310718c6fa6adeee06d207a55489546d860e2c; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a преди 497cba0b02e5555d99fe9ee1dc478af743ab7f7a; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a преди 1f2e92e499d863f81df1732af59b4a3559969193; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a преди 574ae2ac2b314aa33498cd2c28add106cbe644f2; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a преди a520e8cac54fb403f3800125b606f55fcad42cb9; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a преди d64a75369cd0f2ee79afcc9d9ca34a3890989379; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a преди b53435c079c78f89f70a62dd5a322cca4e292b34; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a преди 78004e9a87f240df03e2f73120d291763c32e0a7
    • Linux Linux: 3.1; преди 3.1; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; 7.3 до *

    История

    • 11 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-89489: Linux | freedomonline.bg