CVE-2026-31569
HighSummary
W jądrze systemu Linux rozwiązano podatność związaną z obsługą pustej mapy rdzeni EIOINTC w funkcji eiointc_update_sw_coremap(). W przypadku pustej mapy, zamiast wartości -1, powinno być używane 0, co zapobiega nieprawidłowemu dostępowi do tablicy kvm_arch::phyid_map::phys_map[].
Risk Assessment
Brak odpowiedniej obsługi pustej mapy rdzeni może prowadzić do nieautoryzowanego dostępu do pamięci, co stwarza ryzyko destabilizacji systemu lub potencjalnego wykorzystania przez złośliwe oprogramowanie.
Recommendation
Zaleca się aktualizację jądra systemu Linux do najnowszej wersji, aby usunąć tę podatność i zabezpieczyć system przed potencjalnymi atakami.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: LoongArch: KVM: Handle the case that EIOINTC's coremap is empty EIOINTC's coremap in eiointc_update_sw_coremap() can be empty, currently we get a cpuid with -1 in this case, but we actually need 0 because it's similar as the case that cpuid >= 4. This fix an out-of-bounds access to kvm_arch::phyid_map::phys_map[].
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

