Tracker / CVE-2024-50142
CVE-2024-50142
Medium 5.5
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.
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 2.6.12 → 4.19.323 |
| linux | linux_kernel · 4.20 → 5.4.285 |
| linux | linux_kernel · 5.11 → 5.15.170 |
| linux | linux_kernel · 5.16 → 6.1.115 |
| linux | linux_kernel · 5.5 → 5.10.229 |
| linux | linux_kernel · 6.2 → 6.6.59 |
| linux | linux_kernel · 6.7 → 6.11.6 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.