CVE-2026-89568: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: kho: fix size calculation in kho_preserved_memory_reserve() kho_preserved_memory_reserve() calculates the size of a preservation by doing 1 << (order + PAGE_SHIFT). Since the '1' is a 32-bit integer, it can only be shifted by 31. That is, it will only work for preservations up to 2 GiB. Larger preservations will trigger undefined behaviour. While preservations larger than 2 GiB can't be obtained via folios currently, they can be obtained via kho_preserve_pages(). For example, memblock reserve_mem uses kho_preserve_pages(). Reservations larger than 2 GiB are valid and will trigger this bug if properly aligned. Fix it by using 1UL for shifting.

Засегнати продукти

• Linux Linux: fc33e4b44b2717feba2f6f07ce7943a96499c9ec преди 0692a8fdf0222af130c8ea97426f1c3bf3814905; fc33e4b44b2717feba2f6f07ce7943a96499c9ec преди 42a6f03cf352eb6e6dbeef95e75e686f4cdb9bd1; fc33e4b44b2717feba2f6f07ce7943a96499c9ec преди 3a0b8fa2eb36afc88b62a95f33f0c77c71fa5ded
• Linux Linux: 6.16; преди 6.16; 6.18.57 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-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-89568
• https://nvd.nist.gov/vuln/detail/CVE-2026-89568
• https://git.kernel.org/stable/c/0692a8fdf0222af130c8ea97426f1c3bf3814905
• https://git.kernel.org/stable/c/42a6f03cf352eb6e6dbeef95e75e686f4cdb9bd1
• https://git.kernel.org/stable/c/3a0b8fa2eb36afc88b62a95f33f0c77c71fa5ded