CVSS 7.1 · High EPSS 0,28%
Kerentanan Out-of-bounds Read pada linux kernel. Skor CVSS 3.1 7.1 (High) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: x86/alternatives: Disable KASAN in apply_alternatives() Fei has reported that KASAN triggers during apply_alternatives() on a 5-level paging machine: BUG: KASAN: out-of-bounds in rcu_is_watching() Read of size 4 at addr ff110003ee6419a0 by task swapper/0/0 ... __asan_load4() rcu_is_watching() trace_hardirqs_on() text_poke_early() apply_alternatives() ... On machines with 5-level paging, cpu_feature_enabled(X86_FEATURE_LA57) gets patched. It includes KASAN code, where KASAN_SHADOW_START depends on __VIRTUAL_MASK_SHIFT, which is defined with cpu_feature_enabled(). KASAN gets confused when apply_alternatives() patches the KASAN_SHADOW_START users. A test patch that makes KASAN_SHADOW_START static, by replacing __VIRTUAL_MASK_SHIFT with 56, works around the issue. Fix it for real by disabling KASAN while the kernel is patching alternatives. [ mingo: updated the changelog ]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 4.17 hingga sebelum 4.19.297 |
| linux | linux kernel | Versi 4.20 hingga sebelum 5.4.270 |
| linux | linux kernel | Versi 5.5 hingga sebelum 5.10.199 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.136 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.1.59 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.5.8 |
| linux | linux kernel | Versi 6.6 rc1 |
| linux | linux kernel | Versi 6.6 rc2 |
| linux | linux kernel | Versi 6.6 rc3 |
| linux | linux kernel | Versi 6.6 rc4 |
| linux | linux kernel | Versi 6.6 rc5 |