CVE-2026-43099
HighCVSS 7.5Exploitation Probability (EPSS)
Elevated risk53th percentile - higher than 53% of all known CVEs
Summary
W jądrze systemu Linux zidentyfikowano podatność, która została naprawiona. Problem dotyczy funkcji icmp_build_probe(), gdzie przekazanie wskaźnika błędu do dev_hold() może prowadzić do awarii jądra z powodu dereferencji wskaźnika null.
Risk Assessment
W przypadku aktywacji IPv6, błąd ten może prowadzić do krytycznych awarii systemu, co zagraża stabilności i dostępności usług w organizacji.
Recommendation
Zaleca się aktualizację jądra systemu Linux do najnowszej wersji, aby usunąć tę podatność i zapewnić stabilność systemu.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: ipv4: icmp: fix null-ptr-deref in icmp_build_probe() ipv6_stub->ipv6_dev_find() may return ERR_PTR(-EAFNOSUPPORT) when the IPv6 stack is not active (CONFIG_IPV6=m and not loaded), and passing this error pointer to dev_hold() will cause a kernel crash with null-ptr-deref. Instead, silently discard the request. RFC 8335 does not appear to define a specific response for the case where an IPv6 interface identifier is syntactically valid but the implementation cannot perform the lookup at runtime, and silently dropping the request may safer than misreporting "No Such Interface".
Vulnerability data from NVD (NIST) · CISA KEV · EPSS