CVE-2024-50142

In the Linux kernel, the following vulnerability has been resolved: xfrm: validate new SA's prefixlen using SA family when sel.family is unset This expands the validation introduced in commit 07bf7908950a ("xfrm: Validate address prefix lengths in the xfrm selector.") syzbot created an SA with usersa.sel.family = AF_UNSPEC usersa.sel.prefixlen_s = 128 usersa.family = AF_INET Because of the AF_UNSPEC selector, verify_newsa_info doesn't put limits on prefixlen_{s,d}. But then copy_from_user_state sets x->sel.family to usersa.family (AF_INET). Do the same conversion in verify_newsa_info before validating prefixlen_{s,d}, since that's how prefixlen is going to be used later on.

• linux linux kernel (>= 2.6.12 < 4.19.323) • linux linux kernel (>= 4.20 < 5.4.285) • linux linux kernel (>= 5.5 < 5.10.229) • linux linux kernel (>= 5.11 < 5.15.170) • linux linux kernel (>= 5.16 < 6.1.115) • linux linux kernel (>= 6.2 < 6.6.59) • linux linux kernel (>= 6.7 < 6.11.6) • linux linux kernel 6.12