CVSS 5.5 · Medium EPSS 0,25%
Kerentanan pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: loop: Check for overflow while configuring loop The userspace can configure a loop using an ioctl call, wherein a configuration of type loop_config is passed (see lo_ioctl()'s case on line 1550 of drivers/block/loop.c). This proceeds to call loop_configure() which in turn calls loop_set_status_from_info() (see line 1050 of loop.c), passing &config->info which is of type loop_info64*. This function then sets the appropriate values, like the offset. loop_device has lo_offset of type loff_t (see line 52 of loop.c), which is typdef-chained to long long, whereas loop_info64 has lo_offset of type __u64 (see line 56 of include/uapi/linux/loop.h). The function directly copies offset from info to the device as follows (See line 980 of loop.c): lo->lo_offset = info->lo_offset; This results in an overflow, which triggers a warning in iomap_iter() due to a call to iomap_iter_done() which has: WARN_ON_ONCE(iter->iomap.offset > iter->pos); Thus, check for negative value during loop_set_status_from_info(). Bug report: https://syzkaller.appspot.com/bug?id=c620fe14aac810396d3c3edc9ad73848bf69a29e
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Semua versi sebelum 4.9.327 |
| linux | linux kernel | Versi 4.10 hingga sebelum 4.14.292 |
| linux | linux kernel | Versi 4.15 hingga sebelum 4.19.312 |
| linux | linux kernel | Versi 4.20 hingga sebelum 5.4.274 |
| linux | linux kernel | Versi 5.5 hingga sebelum 5.10.140 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.64 |
| linux | linux kernel | Versi 5.16 hingga sebelum 5.19.6 |
| linux | linux kernel | Versi 6.0 rc1 |
| linux | linux kernel | Versi 6.0 rc2 |