CVSS 7.8 · High EPSS 0,27%
Kerentanan Out-of-bounds Read pada linux kernel. Skor CVSS 3.1 7.8 (High) menurut CNA.
In the Linux kernel, the following vulnerability has been resolved: tty: n_gsm: fix possible out-of-bounds in gsm0_receive() Assuming the following: - side A configures the n_gsm in basic option mode - side B sends the header of a basic option mode frame with data length 1 - side A switches to advanced option mode - side B sends 2 data bytes which exceeds gsm->len Reason: gsm->len is not used in advanced option mode. - side A switches to basic option mode - side B keeps sending until gsm0_receive() writes past gsm->buf Reason: Neither gsm->state nor gsm->len have been reset after reconfiguration. Fix this by changing gsm->count to gsm->len comparison from equal to less than. Also add upper limit checks against the constant MAX_MRU in gsm0_receive() and gsm1_receive() to harden against memory corruption of gsm->len and gsm->mru. All other checks remain as we still need to limit the data according to the user configuration and actual payload size.
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 2.6.35 hingga sebelum 4.19.316 |
| linux | linux kernel | Versi 4.20 hingga sebelum 5.4.278 |
| linux | linux kernel | Versi 5.5 hingga sebelum 5.10.219 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.161 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.1.93 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.6.33 |
| linux | linux kernel | Versi 6.7 hingga sebelum 6.8.12 |
| linux | linux kernel | Versi 6.9 hingga sebelum 6.9.3 |