AZL-49428
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-49428.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-49428
- Upstream
- Published
- 2024-09-18T08:15:06Z
- Modified
- 2026-04-01T05:17:23.874601Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- CVE-2024-46798 affecting package kernel for versions less than 5.15.167.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ASoC: dapm: Fix UAF for sndsocpcm_runtime object
When using kernel with the following extra config,
- CONFIG_KASAN=y
- CONFIGKASANGENERIC=y
- CONFIGKASANINLINE=y
- CONFIGKASANVMALLOC=y
- CONFIGFRAMEWARN=4096
kernel detects that sndpcmsuspendall() access a freed 'sndsocpcmruntime' object when the system is suspended, which leads to a use-after-free bug:
[ 52.047746] BUG: KASAN: use-after-free in sndpcmsuspend_all+0x1a8/0x270 [ 52.047765] Read of size 1 at addr ffff0000b9434d50 by task systemd-sleep/2330
[ 52.047785] Call trace: [ 52.047787] dumpbacktrace+0x0/0x3c0 [ 52.047794] showstack+0x34/0x50 [ 52.047797] dumpstacklvl+0x68/0x8c [ 52.047802] printaddressdescription.constprop.0+0x74/0x2c0 [ 52.047809] kasan_report+0x210/0x230 [ 52.047815] __asanreportload1noabort+0x3c/0x50 [ 52.047820] sndpcmsuspendall+0x1a8/0x270 [ 52.047824] sndsocsuspend+0x19c/0x4e0
The sndpcmsync_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.
- References