Description (CNA)
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
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected f775f2621c2ac5cc3a0b3a64665dad4fb146e510 before baabe43a0edefac8cd7b981ff87f967f6034dafe; affected 4cb3cf7177ae3666be7fb27d4ad4d72a295fb02d before 76abc83a9d25593c2b7613c549413079c14a4686; affected 2871aa407007f6f531fae181ad252486e022df42 before 7d75570002929d20e40110d6b03e46202c9d1bc7; affected 24e05760186dc070d3db190ca61efdbce23afc88 before fdecd3b6aac10d5a18d0dc500fe57f8648b66cd4; affected efa56305908ba20de2104f1b8508c6a7401833be before 3def5243150716be86599c2a1767c29c68838b6d; affected efa56305908ba20de2104f1b8508c6a7401833be before 374b095e265fa27465f34780e0eb162ff1bef913; affected efa56305908ba20de2104f1b8508c6a7401833be before 32b63acd78f577b332d976aa06b56e70d054cbba; affected ee5e7632e981673f42a50ade25e71e612e543d9d; affected 70154e8d015c9b4fb56c1a2ef1fc8b83d45c7f68; affected 5.10.209 before 5.10.249; affected 5.15.148 before 5.15.199; affected 6.1.75 before 6.1.162; affected 6.6.14 before 6.6.122; affected 5.4.268 before 5.5; affected 6.7.2 before 6.8 |
| Linux / Linux | affected 6.8; unaffected 0 before 6.8; unaffected 5.10.249 through 5.10.*; unaffected 5.15.199 through 5.15.*; unaffected 6.1.162 through 6.1.*; unaffected 6.6.122 through 6.6.*; unaffected 6.12.67 through 6.12.*; unaffected 6.18.7 through 6.18.*; unaffected 6.19 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/baabe43a0edefac8cd7b981ff87f967f6034dafe
- https://git.kernel.org/stable/c/76abc83a9d25593c2b7613c549413079c14a4686
- https://git.kernel.org/stable/c/7d75570002929d20e40110d6b03e46202c9d1bc7
- https://git.kernel.org/stable/c/fdecd3b6aac10d5a18d0dc500fe57f8648b66cd4
- https://git.kernel.org/stable/c/3def5243150716be86599c2a1767c29c68838b6d
- https://git.kernel.org/stable/c/374b095e265fa27465f34780e0eb162ff1bef913
- https://git.kernel.org/stable/c/32b63acd78f577b332d976aa06b56e70d054cbba
ADP enrichment
No English description supplied.
No references supplied.