CVE-2020-11725
HighSummary
W funkcji snd_ctl_elem_add w jądrze Linuxa do wersji 5.6.3 występuje problem związany z linią count=info->owner, co wpływa na mnożenie private_size*count, prowadząc do nieokreślonych 'interesujących efektów ubocznych'. Inżynierowie jądra kwestionują tę podatność, twierdząc, że może być istotna tylko w przypadku dodania nowych wywołań, które nie są świadome niewłaściwego użycia pola info->owner.
Risk Assessment
Ryzyko dla organizacji polega na potencjalnym wprowadzeniu nieprzewidzianych efektów ubocznych w systemie, co może prowadzić do nieprawidłowego działania aplikacji lub systemu. Istnieje jednak kontrowersja co do rzeczywistego wpływu tej podatności, ponieważ istniejące wywołania zostały zaprojektowane w sposób bezpieczny.
Recommendation
Zaleca się monitorowanie aktualizacji jądra Linux oraz stosowanie najnowszych poprawek, aby zminimalizować ryzyko związane z tą podatnością. Warto również przeanalizować użycie pola info->owner w kontekście własnych aplikacji.
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Original NVD description (English source)
snd_ctl_elem_add in sound/core/control.c in the Linux kernel through 5.6.3 has a count=info->owner line, which later affects a private_size*count multiplication for unspecified "interesting side effects." NOTE: kernel engineers dispute this finding, because it could be relevant only if new callers were added that were unfamiliar with the misuse of the info->owner field to represent data unrelated to the "owner" concept. The existing callers, SNDRV_CTL_IOCTL_ELEM_ADD and SNDRV_CTL_IOCTL_ELEM_REPLACE, have been designed to misuse the info->owner field in a safe way
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

