CVE-2026-43093
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
W jądrze systemu Linux rozwiązano podatność związaną z walidacją przestrzeni nagłówka w funkcji xdp_umem_reg(). Niewłaściwa walidacja mogła prowadzić do niewystarczającej przestrzeni na minimalny rozmiar ramki ethernetowej oraz do uszkodzenia informacji o współdzielonym buforze w przypadku użycia wielu buforów.
Risk Assessment
Podatność ta może prowadzić do problemów z odbieraniem danych w sieci oraz do potencjalnych uszkodzeń pamięci, co może wpłynąć na stabilność i bezpieczeństwo systemu.
Recommendation
Zaleca się aktualizację jądra systemu Linux do najnowszej wersji, aby usunąć tę podatność oraz zapewnić odpowiednią walidację przestrzeni nagłówka i ogólne bezpieczeństwo systemu.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: xsk: tighten UMEM headroom validation to account for tailroom and min frame The current headroom validation in xdp_umem_reg() could leave us with insufficient space dedicated to even receive minimum-sized ethernet frame. Furthermore if multi-buffer would come to play then skb_shared_info stored at the end of XSK frame would be corrupted. HW typically works with 128-aligned sizes so let us provide this value as bare minimum. Multi-buffer setting is known later in the configuration process so besides accounting for 128 bytes, let us also take care of tailroom space upfront.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

