# CVE-2023-52736: linux: In the Linux kernel, the following vulnerability has been resolved:  ALSA: hda: Do not unset preset when cleaning up...

CVE-2023-52736 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52736, released May 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-52736
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 21, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  ALSA: hda: Do not unset preset when cleaning up codec  Several functions that take part in codec's initialization and removal are re-used by ASoC codec drivers implementations. Drivers mimic the behavior of hda_codec_driver_probe/remove() found in sound/pci/hda/hda_bind.c with their component->probe/remove() instead.  One of the reasons for that is the expectation of snd_hda_codec_device_new() to receive a valid pointer to an instance of struct snd_card. This expectation can be met only once sound card components probing commences.  As ASoC sound card may be unbound without codec device being actually removed from the system, unsetting ->preset in snd_hda_codec_cleanup_for_unbind() interferes with module unload -> load scenario causing null-ptr-deref. Preset is assigned only once, during device/driver matching whereas ASoC codec driver's module reloading may occur several times throughout the lifetime of an audio stack.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.15-1 | [DEBIAN-CVE-2023-52736](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52736.md) | May 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.1.15-1 | [DEBIAN-CVE-2023-52736](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52736.md) | May 21, 2024 |
| Linux | linux Debian 14 | 6.1.15-1 | [DEBIAN-CVE-2023-52736](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52736.md) | May 21, 2024 |

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