CVE-2023-52454 nvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length

2024-02-2314:46:17

Linux

github.com

linux kernel

nvmet-tcp

kernel panic

h2c pdu

fatal error

maxh2cdata parameter

AI Score

6.7

Confidence

Low

EPSS

Percentile

5.1%

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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().

CNA Affected

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    "product": "Linux",
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    ],
    "programFiles": [
      "drivers/nvme/target/tcp.c"
    ],
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        "version": "5.10.209",
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    ],
    "programFiles": [
      "drivers/nvme/target/tcp.c"
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]