Suppose you have glibc 2.5 compiled with kernel headers 2.6.18
- Is it safe to run this glibc with Linux kernel 2.6.32?
- Is it safe to run this glibc with Linux kernel 2.6.9?
Suppose you have glibc 2.5 compiled with kernel headers 2.6.18
I should be possible to run older software on a newer glibc and kernel, although depending on how old it is you may have to set various $LD_* options; see the ld.so(8) man page for more details.
Running software with an older glibc usually does not work; using an older kernel may or may not work, depending on what kernel features it uses.