# CVE-2023-52454: linux: In the Linux kernel, the following vulnerability has been resolved:  nvmet-tcp: Fix a kernel panic when host sends an...

CVE-2023-52454 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52454, released February 23, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-52454
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0068
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 23, 2024

## 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().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.76-1 | [DEBIAN-CVE-2023-52454](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52454.md) | Feb 23, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.6.15-1 | [DEBIAN-CVE-2023-52454](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52454.md) | Feb 23, 2024 |
| Linux | linux Debian 14 | 6.6.15-1 | [DEBIAN-CVE-2023-52454](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52454.md) | Feb 23, 2024 |

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