CVE-2023-52454: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.7% chance of exploitation in the next 30 days.

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().

Affected products

• Linux Linux Kernel: from 5.0.0, before 5.4.268 (fixed in 5.4.268); from 5.5.0, before 5.10.209 (fixed in 5.10.209); from 5.11.0, before 5.15.148 (fixed in 5.15.148); from 5.16.0, before 6.1.75 (fixed in 6.1.75); from 6.2.0, before 6.6.14 (fixed in 6.6.14); from 6.7.0, before 6.7.2 (fixed in 6.7.2)

Published 2024-02-23. Last modified 2026-08-04.