CVE-2026-98650: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Fix potential races in dat skey functions When dat_cond_set_storage_key() finds a large page, it will conditionally set the storage key in absolute memory using large_crste_to_phys() to get the absolute address. There is a race window between dat_entry_walk() and large_crste_to_phys(): the large page could have been split concurrently, and large_crste_to_phys() might be called with a crste that does not designate a large page, leading to crashes. Similar issues were also present in dat_set_storage_key(). dat_get_storage_key() and dat_reset_reference_bit() did instead check for a potential concurrent splitting of the large page, but then handled it incorrectly. Fix by performing a READ_ONCE on the crste pointer, checking and using the result, instead of dereferencing the pointer again. In case a race is detacted, try dat_entry_walk() again.

Засегнати продукти

• Linux Linux: 8e03e8316eb242af307d1c789d09f1a1457cf9a3 преди c958f0498891203fddf2764b28f8b102c6bfd719; 8e03e8316eb242af307d1c789d09f1a1457cf9a3 преди 27554b9505ddfc0aeab466aeb60929dfa17284c7
• Linux Linux: 7.0; преди 7.0; 7.2.9 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-2026-98650
• https://nvd.nist.gov/vuln/detail/CVE-2026-98650
• https://git.kernel.org/stable/c/c958f0498891203fddf2764b28f8b102c6bfd719
• https://git.kernel.org/stable/c/27554b9505ddfc0aeab466aeb60929dfa17284c7