CVE-2026-23326
HighSummary
W jądrze systemu Linux zidentyfikowano podatność związaną z usuwaniem węzłów fragmentów, co prowadzi do wycieku bufora. Problem wynika z niewłaściwego zarządzania wskaźnikami węzłów po ich usunięciu z listy, co powoduje, że bufor nie jest prawidłowo dodawany do listy zwolnionych buforów.
Risk Assessment
Organizacje mogą być narażone na wycieki pamięci, co może prowadzić do obniżenia wydajności systemu oraz potencjalnych problemów z dostępnością usług. Długotrwałe wycieki pamięci mogą również prowadzić do destabilizacji systemu.
Recommendation
Zaleca się aktualizację jądra systemu Linux do wersji, która zawiera poprawkę dla tej podatności. Należy również monitorować systemy pod kątem oznak wycieków pamięci.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: xsk: Fix fragment node deletion to prevent buffer leak After commit b692bf9a7543 ("xsk: Get rid of xdp_buff_xsk::xskb_list_node"), the list_node field is reused for both the xskb pool list and the buffer free list, this causes a buffer leak as described below. xp_free() checks if a buffer is already on the free list using list_empty(&xskb->list_node). When list_del() is used to remove a node from the xskb pool list, it doesn't reinitialize the node pointers. This means list_empty() will return false even after the node has been removed, causing xp_free() to incorrectly skip adding the buffer to the free list. Fix this by using list_del_init() instead of list_del() in all fragment handling paths, this ensures the list node is reinitialized after removal, allowing the list_empty() to work correctly.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS