CVE-2026-23258
MediumSummary
W jądrze Linuxa zidentyfikowano podatność polegającą na braku inicjalizacji wskaźnika netdev przed konfiguracją kolejek w funkcji setup_nic_devices(). W przypadku błędu podczas ustawiania kolejek, alokowany netdev nie jest zwalniany, co prowadzi do wycieku pamięci.
Risk Assessment
Organizacja może napotkać problemy z wydajnością i stabilnością systemu z powodu wycieków pamięci, co może prowadzić do zwiększonego zużycia zasobów i potencjalnych awarii.
Recommendation
Zaleca się aktualizację jądra Linuxa do wersji, w której wprowadzono poprawkę, aby zapewnić prawidłową inicjalizację wskaźnika netdev przed konfiguracją kolejek.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: net: liquidio: Initialize netdev pointer before queue setup In setup_nic_devices(), the netdev is allocated using alloc_etherdev_mq(). However, the pointer to this structure is stored in oct->props[i].netdev only after the calls to netif_set_real_num_rx_queues() and netif_set_real_num_tx_queues(). If either of these functions fails, setup_nic_devices() returns an error without freeing the allocated netdev. Since oct->props[i].netdev is still NULL at this point, the cleanup function liquidio_destroy_nic_device() will fail to find and free the netdev, resulting in a memory leak. Fix this by initializing oct->props[i].netdev before calling the queue setup functions. This ensures that the netdev is properly accessible for cleanup in case of errors. Compile tested only. Issue found using a prototype static analysis tool and code review.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

