Pokhazikitsa foni yam'manja ya futex (fast userspace mutex), kugwiritsa ntchito kukumbukira kwa stack pambuyo paulere kudapezeka ndikuchotsedwa. Izi, zinapangitsa kuti wowukirayo agwiritse ntchito code yake molingana ndi kernel, ndi zotsatira zake zonse kuchokera pachitetezo. Chiwopsezo chinali mu code chothandizira zolakwika.
Kukonza Kusatetezeka uku kudawonekera pamzere waukulu wa Linux pa Januware 28 ndipo dzulo lake kudalowa m'maso 5.10.12, 5.4.94, 4.19.172, 4.14.218.
Pokambitsirana za kukonzaku, zidanenedwa kuti chiwopsezochi chilipo m'magulu onse kuyambira 2008:
https://www.openwall.com/lists/oss-security/2021/01/29/3
FWIW, kudzipereka uku kuli ndi izi: Kukonza: 1b7558e457ed ("futexes: kukonza zolakwika mu futex_lock_pi") ndipo kudzipereka kwinaku kukuchokera ku 2008. Chifukwa chake mwina onse omwe amasungidwa pa Linux distros ndi kutumizidwa kwawo akhudzidwa, pokhapokha ngati china chake chachepetsa vutoli m'matembenuzidwe ena a kernel. .
Source: linux.org.ru