CVE-2026-89895

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux85756a069c55e0315ac5990806899cfb607b987f < 75bbf45e3a954e292ae26832d2df40ca2e3ee452affected
LinuxLinux85756a069c55e0315ac5990806899cfb607b987f < fe65028ee72a7e07e572b351891bd7a1f8917d33affected
LinuxLinux85756a069c55e0315ac5990806899cfb607b987f < 61dfa8ded5efc3a25d331fa9ce5cebb85531fe70affected
LinuxLinux85756a069c55e0315ac5990806899cfb607b987f < 42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8affected
LinuxLinux85756a069c55e0315ac5990806899cfb607b987f < 6cbc8a73b3464ebeccc49987b7233b6b087b8504affected
LinuxLinux85756a069c55e0315ac5990806899cfb607b987f < cb1218da234ea15fa14d90e2d049d686874d7aa3affected
LinuxLinux85756a069c55e0315ac5990806899cfb607b987f < 8c6610e230b9355cf7df5a338a0592c0f088c00baffected
LinuxLinux85756a069c55e0315ac5990806899cfb607b987f < 3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1affected
LinuxLinux4.2affected
LinuxLinux0 < 4.2unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.51 <= 6.18.*unaffected
LinuxLinux7.2.5 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References