Debian: CVE-2024-46798: linux, linux-6.1 -- security update

Debian: CVE-2024-46798: linux, linux-6.1 -- security update

Severity

7

CVSS

(AV:L/AC:L/Au:S/C:C/I:C/A:C)

Published

09/18/2024

Created

10/08/2024

Added

10/07/2024

Modified

01/30/2025

Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: dapm: Fix UAF for snd_soc_pcm_runtime object When using kernel with the following extra config, - CONFIG_KASAN=y - CONFIG_KASAN_GENERIC=y - CONFIG_KASAN_INLINE=y - CONFIG_KASAN_VMALLOC=y - CONFIG_FRAME_WARN=4096 kernel detects that snd_pcm_suspend_all() access a freed 'snd_soc_pcm_runtime' object when the system is suspended, which leads to a use-after-free bug: [ 52.047746] BUG: KASAN: use-after-free in snd_pcm_suspend_all+0x1a8/0x270 [ 52.047765] Read of size 1 at addr ffff0000b9434d50 by task systemd-sleep/2330 [ 52.047785] Call trace: [ 52.047787]dump_backtrace+0x0/0x3c0 [ 52.047794]show_stack+0x34/0x50 [ 52.047797]dump_stack_lvl+0x68/0x8c [ 52.047802]print_address_description.constprop.0+0x74/0x2c0 [ 52.047809]kasan_report+0x210/0x230 [ 52.047815]__asan_report_load1_noabort+0x3c/0x50 [ 52.047820]snd_pcm_suspend_all+0x1a8/0x270 [ 52.047824]snd_soc_suspend+0x19c/0x4e0 The snd_pcm_sync_stop() has a NULL check on 'substream->runtime' before making any access. So we need to always set 'substream->runtime' to NULL everytime we kfree() it.

Solution(s)

• debian-upgrade-linux
• debian-upgrade-linux-6-1

References

• https://attackerkb.com/topics/cve-2024-46798
• CVE - 2024-46798
• DSA-5782-1