N'ime mmejuputa futex (ngwa ngwa userspace mutex) oku sistemu, kpochie ojiji ebe nchekwa mgbe achọpụtara ma kpochapụ ya n'efu. Nke a, n'aka nke ya, kwere ka onye na-awakpo ahụ mebie koodu ya na ọnọdụ nke kernel, na ihe niile na-esote site na nche. Ihe ọghọm dị na koodu njikwa njehie.
Ndozi Ihe ọghọm a pụtara na Linux mainline na Jenụwarị 28 na ụbọchị gara aga ụnyaahụ ọ banyere kernels 5.10.12, 5.4.94, 4.19.172, 4.14.218.
N'oge mkparịta ụka nke ndozi a, a tụrụ aro na adịghị ike a dị na kernels niile kemgbe 2008:
https://www.openwall.com/lists/oss-security/2021/01/29/3
FWIW, this commit has: Fixes: 1b7558e457ed ("futexes: fix fault handling in futex_lock_pi") and that other commit is from 2008. So probably all currently maintained Linux distros and deployments are affected, unless something else mitigated the issue in some kernel versions.
isi: linux.org.ru