CVE - CVE-2022-49292

CVE-ID
CVE-2022-49292	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0c4190b41a69990666b4000999e27f8f1b2a426b URL:https://git.kernel.org/stable/c/0c4190b41a69990666b4000999e27f8f1b2a426b MISC:https://git.kernel.org/stable/c/5ce74ff7059341d8b2f4d01c3383491df63d1898 URL:https://git.kernel.org/stable/c/5ce74ff7059341d8b2f4d01c3383491df63d1898 MISC:https://git.kernel.org/stable/c/7a40cbf3579a8e14849ba7ce46309c1992658d2b URL:https://git.kernel.org/stable/c/7a40cbf3579a8e14849ba7ce46309c1992658d2b MISC:https://git.kernel.org/stable/c/a63af1baf0a5e11827db60e3127f87e437cab6e5 URL:https://git.kernel.org/stable/c/a63af1baf0a5e11827db60e3127f87e437cab6e5 MISC:https://git.kernel.org/stable/c/e74a069c6a7bb505f3ade141dddf85f4b0b5145a URL:https://git.kernel.org/stable/c/e74a069c6a7bb505f3ade141dddf85f4b0b5145a MISC:https://git.kernel.org/stable/c/efb6402c3c4a7c26d97c92d70186424097b6e366 URL:https://git.kernel.org/stable/c/efb6402c3c4a7c26d97c92d70186424097b6e366 MISC:https://git.kernel.org/stable/c/fb08bf99195a87c798bc8ae1357337a981faeade URL:https://git.kernel.org/stable/c/fb08bf99195a87c798bc8ae1357337a981faeade
Assigning CNA
kernel.org
Date Record Created
20250226	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250226)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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