CVE-2022-50167
In the Linux kernel, the following vulnerability has been resolved:
bpf: fix potential 32-bit overflow when accessing ARRAY map element
If BPF array map is bigger than 4GB, element pointer calculation can overflow because both index and elem_size are u32. Fix this everywhere by forcing 64-bit multiplication. Extract this formula into separate small helper and use it consistently in various places.
Speculative-preventing formula utilizing index_mask trick is left as is, but explicit u64 casts are added in both places.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 5.3 | 5.18.18 |
| linux / linux_kernel | 5.19 | 5.19.2 |
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