A bind security update has been released for CentOS 6.

CentOS-announce: CESA-2020:4183 Moderate CentOS 6 bind Security Update

CentOS Errata and Security Advisory 2020:4183 Moderate

Upstream details at :   https://access.redhat.com/errata/RHSA-2020:4183

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

i386:
005bce6ed62ad05eb4697d75f3b8e181eba99dd1fce71862efb805d94e6340ae bind-9.8.2-0.68.rc1.el6_10.8.i686.rpm
1a6cd4a05aceb72fad7e3e8ec4498d0163e10789508827d40ca8c30ab2e59ec3 bind-chroot-9.8.2-0.68.rc1.el6_10.8.i686.rpm
1e6db87ec42332ffce17fc56e826634a8bae22a2051b0b1c712588b46c050156 bind-devel-9.8.2-0.68.rc1.el6_10.8.i686.rpm
dbc488b4d284cb27407a048a238b1ce875237f0bd77cf652e42e5665efa05b0a bind-libs-9.8.2-0.68.rc1.el6_10.8.i686.rpm
422dbf2898b00c170e44c71945c0f741c3dc7431cd8c6a72afdc13625aca92bd bind-sdb-9.8.2-0.68.rc1.el6_10.8.i686.rpm
64f21d31c6f75149ac5d67928f8ad65a1826a10bffe742cbef95fae0f9e00591 bind-utils-9.8.2-0.68.rc1.el6_10.8.i686.rpm

x86_64:
336fdfe427c36ebb58869a32f443fbc9c28631f5732deb2bf375052f7b2d2fb7 bind-9.8.2-0.68.rc1.el6_10.8.x86_64.rpm
f2caf6a7899aed82a91d101959b8854a268ed672dd7a003721740160aedf02f7 bind-chroot-9.8.2-0.68.rc1.el6_10.8.x86_64.rpm
1e6db87ec42332ffce17fc56e826634a8bae22a2051b0b1c712588b46c050156 bind-devel-9.8.2-0.68.rc1.el6_10.8.i686.rpm
eebc1e9b30eae9aeca2d5959d2bd4512cd48e81c8b94075c5e30e33b0fd17abc bind-devel-9.8.2-0.68.rc1.el6_10.8.x86_64.rpm
dbc488b4d284cb27407a048a238b1ce875237f0bd77cf652e42e5665efa05b0a bind-libs-9.8.2-0.68.rc1.el6_10.8.i686.rpm
2977f6759d853ebd83889582bf47f449ccf66545d8f5da4247b0cdbacaef9a9a bind-libs-9.8.2-0.68.rc1.el6_10.8.x86_64.rpm
77b2d4d6aa7275f303891c82ee8e353bd7dd0f670d8b984b30fb1f6c5a279132 bind-sdb-9.8.2-0.68.rc1.el6_10.8.x86_64.rpm
d99f0c01e4aac751795ffafe8302efdf6f81c02e6226323ea742a37b417605b4 bind-utils-9.8.2-0.68.rc1.el6_10.8.x86_64.rpm

Source:
b86b1a45c7822e0869706835aea7a39e1565ab1a24b4d81bd6bcdf99453c8706 bind-9.8.2-0.68.rc1.el6_10.8.src.rpm