Description

In the Linux kernel, the following vulnerability has been resolved:

nvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length

If the host sends an H2CData command with an invalid DATAL,
the kernel may crash in nvmet_tcp_build_pdu_iovec().

Unable to handle kernel NULL pointer dereference at
virtual address 0000000000000000
lr : nvmet_tcp_io_work+0x6ac/0x718 [nvmet_tcp]
Call trace:
process_one_work+0x174/0x3c8
worker_thread+0x2d0/0x3e8
kthread+0x104/0x110

Fix the bug by raising a fatal error if DATAL isn't coherent
with the packet size.
Also, the PDU length should never exceed the MAXH2CDATA parameter which
has been communicated to the host in nvmet_tcp_handle_icreq().

Classification

CVE ID: CVE-2023-52454

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 5.08% (scored less or equal to compared to others)

EPSS Date: 2025-02-04 (when was this score calculated)

References

https://git.kernel.org/stable/c/ee5e7632e981673f42a50ade25e71e612e543d9d
https://git.kernel.org/stable/c/f775f2621c2ac5cc3a0b3a64665dad4fb146e510
https://git.kernel.org/stable/c/4cb3cf7177ae3666be7fb27d4ad4d72a295fb02d
https://git.kernel.org/stable/c/2871aa407007f6f531fae181ad252486e022df42
https://git.kernel.org/stable/c/24e05760186dc070d3db190ca61efdbce23afc88
https://git.kernel.org/stable/c/70154e8d015c9b4fb56c1a2ef1fc8b83d45c7f68
https://git.kernel.org/stable/c/efa56305908ba20de2104f1b8508c6a7401833be

Timeline