CVSS 7.8 · High EPSS 0,25%
Kerentanan Improper Restriction of Operations within the Bounds of a Memory Buffer pada linux kernel. Skor CVSS 3.1 7.8 (High) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix hashtab overflow check on 32-bit arches The hashtab code relies on roundup_pow_of_two() to compute the number of hash buckets, and contains an overflow check by checking if the resulting value is 0. However, on 32-bit arches, the roundup code itself can overflow by doing a 32-bit left-shift of an unsigned long value, which is undefined behaviour, so it is not guaranteed to truncate neatly. This was triggered by syzbot on the DEVMAP_HASH type, which contains the same check, copied from the hashtab code. So apply the same fix to hashtab, by moving the overflow check to before the roundup.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 3.19 hingga sebelum 4.19.311 |
| linux | linux kernel | Versi 4.20 hingga sebelum 5.4.273 |
| linux | linux kernel | Versi 5.5 hingga sebelum 5.10.214 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.153 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.1.83 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.6.23 |
| linux | linux kernel | Versi 6.7 hingga sebelum 6.7.11 |
| linux | linux kernel | Versi 6.8 hingga sebelum 6.8.2 |