Jason A. Donenfeld, marubucin VPN WireGuard, ya ja hankalin masu haɓakawa zuwa wani ƙazantaccen hack da ke cikin lambar kernel na Linux wanda ke canza halayen tafiyar matakai waɗanda sunayensu suka fara da hali "X". A kallo na farko, ana amfani da irin waɗannan gyare-gyare a cikin rootkits don barin ɓoyayyiyar madogara a cikin tsari, amma bincike ya nuna cewa an ƙara canjin a cikin 2019 don gyara wani ɗan lokaci cin zarafin damar sararin samaniya, daidai da ƙa'idar da ta canza zuwa kernel kada ya karya dacewa da aikace-aikace.
Matsaloli sun taso lokacin da ake ƙoƙarin yin amfani da tsarin don canza yanayin bidiyo ta atomatik a cikin direban DDX xf86-bidiyo-modesetting da aka yi amfani da shi a cikin uwar garken X.Org, wanda ya kasance saboda ɗaure ga tafiyar matakai da suka fara da halin "X" (an ɗauka. An yi amfani da yanayin aiki zuwa tsarin "Xorg"). Kusan nan da nan an gyara matsalar a cikin X.Org (amfani da API ɗin atomic ya ƙare ta tsohuwa), amma sun manta cire gyaran wucin gadi daga kwaya da ƙoƙarin aika ioctl don canza yanayin atomically ga duk hanyoyin farawa da. harafin "X" yana ci gaba da haifar da dawo da kuskure. idan (na yanzu-> comm[0] == 'X' && req->daraja == 1) {pr_info("an gano sarari mai amfani da yanayin yanayin karye, yana kashe atomic\n"); dawowa -EOPNOTSUPP; }
source: budenet.ru