CVE-2026-89503: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Fix subbuf resize race with ring_buffer_alloc_read_page() ring_buffer_alloc_read_page() is racy with ring_buffer_subbuf_order_set, it can allocate a reader page with an outdated order. This isn't a big issue, the user can still re-allocate a new reader page and try again. However, what is more problematic is if the value of subbuf_order changes in the middle of ring_buffer_alloc_read_page(). In that case, bpage->order might not match the actual allocated memory. Use bpage->order for the allocation to prevent this race.

Засегнати продукти

• Linux Linux: bce761d757452ba5eb77e11fecc37a04b67494e7 преди 2313ff69bd237aad264a5913907f374f958335a2; bce761d757452ba5eb77e11fecc37a04b67494e7 преди 2dc510957fe8fd098ab3c3147ebdf34d00cd2734; bce761d757452ba5eb77e11fecc37a04b67494e7 преди 53106e9262a310ef2c9a9321168c03705940c678; bce761d757452ba5eb77e11fecc37a04b67494e7 преди e743527c5bfdceda1095bc0a9e596e2aebb6a9c3
• Linux Linux: 6.8; преди 6.8; 6.12.112 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-89503
• https://nvd.nist.gov/vuln/detail/CVE-2026-89503
• https://git.kernel.org/stable/c/2313ff69bd237aad264a5913907f374f958335a2
• https://git.kernel.org/stable/c/2dc510957fe8fd098ab3c3147ebdf34d00cd2734
• https://git.kernel.org/stable/c/53106e9262a310ef2c9a9321168c03705940c678
• https://git.kernel.org/stable/c/e743527c5bfdceda1095bc0a9e596e2aebb6a9c3