# CVE-2022-50359: linux: In the Linux kernel, the following vulnerability has been resolved:  media: cx88: Fix a null-ptr-deref bug in buffer_...

CVE-2022-50359 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50359, released September 17, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-50359
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 17, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  media: cx88: Fix a null-ptr-deref bug in buffer_prepare()  When the driver calls cx88_risc_buffer() to prepare the buffer, the function call may fail, resulting in a empty buffer and null-ptr-deref later in buffer_queue().  The following log can reveal it:  [   41.822762] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI [   41.824488] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [   41.828027] RIP: 0010:buffer_queue+0xc2/0x500 [   41.836311] Call Trace: [   41.836945]  __enqueue_in_driver+0x141/0x360 [   41.837262]  vb2_start_streaming+0x62/0x4a0 [   41.838216]  vb2_core_streamon+0x1da/0x2c0 [   41.838516]  __vb2_init_fileio+0x981/0xbc0 [   41.839141]  __vb2_perform_fileio+0xbf9/0x1120 [   41.840072]  vb2_fop_read+0x20e/0x400 [   41.840346]  v4l2_read+0x215/0x290 [   41.840603]  vfs_read+0x162/0x4c0  Fix this by checking the return value of cx88_risc_buffer()  [hverkuil: fix coding style issues]

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.3-1 | [DEBIAN-CVE-2022-50359](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50359.md) | Sep 17, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.3-1 | [DEBIAN-CVE-2022-50359](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50359.md) | Sep 17, 2025 |
| Linux | linux Debian 14 | 6.0.3-1 | [DEBIAN-CVE-2022-50359](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50359.md) | Sep 17, 2025 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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