CVE-2026-89895

Description

In the Linux kernel, the following vulnerability has been resolved: media: cobalt: Avoid freeing ALSA private data twice snd_cobalt_card_create() stores cobsc in sc->private_data and installs snd_cobalt_card_private_free() as sc->private_free. From that point, snd_card_free(sc) releases cobsc through the ALSA card cleanup path. If cobalt_alsa_init() fails after snd_cobalt_card_create(), the err_exit_free path calls snd_card_free(sc) and then kfree(cobsc). That second free releases the same object again. Remove the explicit kfree(cobsc) and leave ownership with the ALSA card. This issue was found by a static analysis checker and confirmed by manual source review.

References

• https://git.kernel.org/stable/c/3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1
• https://git.kernel.org/stable/c/42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8
• https://git.kernel.org/stable/c/61dfa8ded5efc3a25d331fa9ce5cebb85531fe70
• https://git.kernel.org/stable/c/6cbc8a73b3464ebeccc49987b7233b6b087b8504
• https://git.kernel.org/stable/c/75bbf45e3a954e292ae26832d2df40ca2e3ee452