# CVE-2026-53348: linux: In the Linux kernel, the following vulnerability has been resolved:  ASoC: SDCA: fix NULL pointer dereference in sdca...

CVE-2026-53348 is fixed in linux on 1 platform by DEBIAN-CVE-2026-53348 (version 7.0.13-1), released July 2, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-53348
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 1, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  ASoC: SDCA: fix NULL pointer dereference in sdca_dev_unregister_functions  sdca_dev_unregister_functions() iterates over all SDCA function descriptors and calls sdca_dev_unregister() on each func_dev without checking for NULL. When a function registration has failed partway through, or the device cleanup races with probe deferral, func_dev entries may be NULL, leading to a kernel oops:    BUG: kernel NULL pointer dereference, address: 0000000000000040   RIP: 0010:device_del+0x1e/0x3e0   Call Trace:    sdca_dev_unregister_functions+0x37/0x60 [snd_soc_sdca]    release_nodes+0x35/0xb0    devres_release_all+0x90/0x100    device_unbind_cleanup+0xe/0x80    device_release_driver_internal+0x1c1/0x200    bus_remove_device+0xc6/0x130    device_del+0x161/0x3e0    device_unregister+0x17/0x60    sdw_delete_slave+0xb6/0xd0 [soundwire_bus]    sdw_bus_master_delete+0x1e/0x50 [soundwire_bus]    ...    sof_probe_work+0x19/0x30 [snd_sof]  This was observed on a Lenovo ThinkPad X1 Carbon G14 (Panther Lake) with the SOF audio driver probe failing due to missing Panther Lake firmware, causing the subsequent cleanup of SoundWire devices to trigger the crash.  Fix this with three changes:  1) Add a NULL guard in sdca_dev_unregister() so that callers do not    need to pre-validate the pointer (defense in depth).  2) In sdca_dev_unregister_functions(), skip NULL func_dev entries    and clear func_dev to NULL after unregistration, making the    function idempotent and safe against double-invocation.  3) In sdca_dev_register_functions(), roll back all previously    registered functions when a later one fails, so the function    array is never left in a partially-populated state.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.0.13-1 | [DEBIAN-CVE-2026-53348](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53348.md) | Jul 2, 2026 |

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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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