CVSS 7.5 · High EPSS 0,79%
Kerentanan NULL Pointer Dereference pada linux kernel. Skor CVSS 3.1 7.5 (High) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_iovec Commit efa56305908b ("nvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length") added ttag bounds checking and data_offset validation in nvmet_tcp_handle_h2c_data_pdu(), but it did not validate whether the command's data structures (cmd->req.sg and cmd->iov) have been properly initialized before processing H2C_DATA PDUs. The nvmet_tcp_build_pdu_iovec() function dereferences these pointers without NULL checks. This can be triggered by sending H2C_DATA PDU immediately after the ICREQ/ICRESP handshake, before sending a CONNECT command or NVMe write command. Attack vectors that trigger NULL pointer dereferences: 1. H2C_DATA PDU sent before CONNECT → both pointers NULL 2. H2C_DATA PDU for READ command → cmd->req.sg allocated, cmd->iov NULL 3. H2C_DATA PDU for uninitialized command slot → both pointers NULL The fix validates both cmd->req.sg and cmd->iov before calling nvmet_tcp_build_pdu_iovec(). Both checks are required because: - Uninitialized commands: both NULL - READ commands: cmd->req.sg allocated, cmd->iov NULL - WRITE commands: both allocated
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 5.4.268 hingga sebelum 5.5 |
| linux | linux kernel | Versi 5.10.209 hingga sebelum 5.10.249 |
| linux | linux kernel | Versi 5.15.148 hingga sebelum 5.15.199 |
| linux | linux kernel | Versi 6.1.75 hingga sebelum 6.1.162 |
| linux | linux kernel | Versi 6.6.14 hingga sebelum 6.6.122 |
| linux | linux kernel | Versi 6.7.2 hingga sebelum 6.12.67 |
| linux | linux kernel | Versi 6.13 hingga sebelum 6.18.7 |
| linux | linux kernel | Versi 6.19 rc1 |
| linux | linux kernel | Versi 6.19 rc2 |
| linux | linux kernel | Versi 6.19 rc3 |
| linux | linux kernel | Versi 6.19 rc4 |
| linux | linux kernel | Versi 6.19 rc5 |