CVE-2026-23112
CriticalCVSS 9.8Summary
W jądrze Linuxa rozwiązano podatność w funkcji nvmet_tcp_build_pdu_iovec, która mogła przechodzić poza granice cmd->req.sg, gdy długość PDU lub offset przekraczały sg_cnt. To mogło prowadzić do błędów GPF/KASAN związanych z nieprawidłowymi wartościami sg->length/offset.
Risk Assessment
Wykorzystanie tej podatności może prowadzić do awarii systemu lub nieprzewidzianego zachowania, co stwarza ryzyko dla stabilności i bezpieczeństwa systemu operacyjnego.
Recommendation
Zaleca się aktualizację jądra Linux do najnowszej wersji, aby usunąć tę podatność oraz wprowadzenie odpowiednich testów w celu monitorowania stabilności systemu.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec nvmet_tcp_build_pdu_iovec() could walk past cmd->req.sg when a PDU length or offset exceeds sg_cnt and then use bogus sg->length/offset values, leading to _copy_to_iter() GPF/KASAN. Guard sg_idx, remaining entries, and sg->length/offset before building the bvec.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS