# CVE-2022-48750: linux: In the Linux kernel, the following vulnerability has been resolved:  hwmon: (nct6775) Fix crash in clear_caseopen  Pa...

CVE-2022-48750 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48750, released June 20, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-48750
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 20, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  hwmon: (nct6775) Fix crash in clear_caseopen  Paweł Marciniak reports the following crash, observed when clearing the chassis intrusion alarm.  BUG: kernel NULL pointer dereference, address: 0000000000000028 PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 3 PID: 4815 Comm: bash Tainted: G S                5.16.2-200.fc35.x86_64 #1 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z97 Extreme4, BIOS P2.60A 05/03/2018 RIP: 0010:clear_caseopen+0x5a/0x120 [nct6775] Code: 68 70 e8 e9 32 b1 e3 85 c0 0f 85 d2 00 00 00 48 83 7c 24 ... RSP: 0018:ffffabcb02803dd8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000 RDX: ffff8e8808192880 RSI: 0000000000000000 RDI: ffff8e87c7509a68 RBP: 0000000000000000 R08: 0000000000000001 R09: 000000000000000a R10: 000000000000000a R11: f000000000000000 R12: 000000000000001f R13: ffff8e87c7509828 R14: ffff8e87c7509a68 R15: ffff8e88494527a0 FS:  00007f4db9151740(0000) GS:ffff8e8ebfec0000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000028 CR3: 0000000166b66001 CR4: 00000000001706e0 Call Trace:  <TASK>  kernfs_fop_write_iter+0x11c/0x1b0  new_sync_write+0x10b/0x180  vfs_write+0x209/0x2a0  ksys_write+0x4f/0xc0  do_syscall_64+0x3b/0x90  entry_SYSCALL_64_after_hwframe+0x44/0xae  The problem is that the device passed to clear_caseopen() is the hwmon device, not the platform device, and the platform data is not set in the hwmon device. Store the pointer to sio_data in struct nct6775_data and get if from there if needed.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.16.7-1 | [DEBIAN-CVE-2022-48750](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48750.md) | Jun 20, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.16.7-1 | [DEBIAN-CVE-2022-48750](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48750.md) | Jun 20, 2024 |
| Linux | linux Debian 14 | 5.16.7-1 | [DEBIAN-CVE-2022-48750](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48750.md) | Jun 20, 2024 |

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