cbcvebase.
CVE-2022-49292
published 2025-02-26

CVE-2022-49292: In the Linux kernel, the following vulnerability has been resolved: ALSA: oss: Fix PCM OSS buffer allocation overflow We've got syzbot reports hitting INT_MAX…

PriorityP341high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.28%
20.1th percentile
In the Linux kernel, the following vulnerability has been resolved: ALSA: oss: Fix PCM OSS buffer allocation overflow We've got syzbot reports hitting INT_MAX overflow at vmalloc() allocation that is called from snd_pcm_plug_alloc(). Although we apply the restrictions to input parameters, it's based only on the hw_params of the underlying PCM device. Since the PCM OSS layer allocates a temporary buffer for the data conversion, the size may become unexpectedly large when more channels or higher rates is given; in the reported case, it went over INT_MAX, hence it hits WARN_ON(). This patch is an attempt to avoid such an overflow and an allocation for too large buffers. First off, it adds the limit of 1MB as the upper bound for period bytes. This must be large enough for all use cases, and we really don't want to handle a larger temporary buffer than this size. The size check is performed at two places, where the original period bytes is calculated and where the plugin buffer size is calculated. In addition, the driver uses array_size() and array3_size() for multiplications to catch overflows for the converted period size and buffer bytes.

Affected

19 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 5.17.3-1 (bookworm)linux 5.17.3-1 (bookworm)
linuxlinux——
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a63af1baf0a5e11827db60e3127f87e437cab6e5a63af1baf0a5e11827db60e3127f87e437cab6e5
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0c4190b41a69990666b4000999e27f8f1b2a426b0c4190b41a69990666b4000999e27f8f1b2a426b
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5ce74ff7059341d8b2f4d01c3383491df63d18985ce74ff7059341d8b2f4d01c3383491df63d1898
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7a40cbf3579a8e14849ba7ce46309c1992658d2b7a40cbf3579a8e14849ba7ce46309c1992658d2b
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fb08bf99195a87c798bc8ae1357337a981faeadefb08bf99195a87c798bc8ae1357337a981faeade
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e74a069c6a7bb505f3ade141dddf85f4b0b5145ae74a069c6a7bb505f3ade141dddf85f4b0b5145a
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < efb6402c3c4a7c26d97c92d70186424097b6e366efb6402c3c4a7c26d97c92d70186424097b6e366
linuxlinux_kernel< 4.19.2374.19.237
linuxlinux_kernel——
linuxlinux_kernel>= 0 < 5.10.113-15.10.113-1
linuxlinux_kernel>= 0 < 5.17.3-15.17.3-1
linuxlinux_kernel>= 0 < 5.17.3-15.17.3-1
linuxlinux_kernel>= 0 < 5.17.3-15.17.3-1
linuxlinux_kernel>= 4.20 < 5.4.1885.4.188
linuxlinux_kernel>= 5.11 < 5.15.325.15.32
linuxlinux_kernel>= 5.16 < 5.16.185.16.18
linuxlinux_kernel>= 5.5 < 5.10.1095.10.109

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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