Tracker / CVE-2024-44965
CVE-2024-44965
Medium 5.5
In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix pti_clone_pgtable() alignment assumption Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that had the form of endless traps until entry stack exhaust and then #DF from the stack guard. It turned out that pti_clone_pgtable() had alignment assumptions on the start address, notably it hard assumes start is PMD aligned. This is true on x86_64, but very much not true on i386. These assumptions can cause the end condition to malfunction, leading to a 'short' clone. Guess what happens when the user mapping has a short copy of the entry text? Use the correct increment form for addr to avoid alignment assumptions.
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 4.19 → 4.19.320 |
| linux | linux_kernel · 4.20 → 5.4.282 |
| linux | linux_kernel · 5.11 → 5.15.165 |
| linux | linux_kernel · 5.16 → 6.1.105 |
| linux | linux_kernel · 5.5 → 5.10.224 |
| linux | linux_kernel · 6.2 → 6.6.46 |
| linux | linux_kernel · 6.7 → 6.10.5 |
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.