CVSS 5.5 · Medium EPSS 0,23%
Kerentanan Missing Release of Memory after Effective Lifetime pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut CISA ADP.
In the Linux kernel, the following vulnerability has been resolved: can: mcba_usb: fix memory leak in mcba_usb Syzbot reported memory leak in SocketCAN driver for Microchip CAN BUS Analyzer Tool. The problem was in unfreed usb_coherent. In mcba_usb_start() 20 coherent buffers are allocated and there is nothing, that frees them: 1) In callback function the urb is resubmitted and that's all 2) In disconnect function urbs are simply killed, but URB_FREE_BUFFER is not set (see mcba_usb_start) and this flag cannot be used with coherent buffers. Fail log: | [ 1354.053291][ T8413] mcba_usb 1-1:0.0 can0: device disconnected | [ 1367.059384][ T8420] kmemleak: 20 new suspected memory leaks (see /sys/kernel/debug/kmem) So, all allocated buffers should be freed with usb_free_coherent() explicitly NOTE: The same pattern for allocating and freeing coherent buffers is used in drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c
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 | Versi 4.12 hingga sebelum 4.14.238 |
| linux | linux kernel | Versi 4.15 hingga sebelum 4.19.196 |
| linux | linux kernel | Versi 4.20 hingga sebelum 5.4.128 |
| linux | linux kernel | Versi 5.5 hingga sebelum 5.10.46 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.12.13 |
| linux | linux kernel | Versi 5.13 rc1 |
| linux | linux kernel | Versi 5.13 rc2 |
| linux | linux kernel | Versi 5.13 rc3 |
| linux | linux kernel | Versi 5.13 rc4 |
| linux | linux kernel | Versi 5.13 rc5 |
| linux | linux kernel | Versi 5.13 rc6 |