CVE-2022-49292

HIGH EPSS 17.3%
Published Feb 26, 20251y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
17.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel* <4.19.237
linuxlinux_kernel*≥4.20  –  <5.4.188
linuxlinux_kernel*≥5.5  –  <5.10.109
linuxlinux_kernel*≥5.11  –  <5.15.32
linuxlinux_kernel*≥5.16  –  <5.16.18
linuxlinux_kernel5.17any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/0c4190b41a69990666b4000999e27f8f1b2a426b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5ce74ff7059341d8b2f4d01c3383491df63d1898
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7a40cbf3579a8e14849ba7ce46309c1992658d2b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a63af1baf0a5e11827db60e3127f87e437cab6e5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e74a069c6a7bb505f3ade141dddf85f4b0b5145a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/efb6402c3c4a7c26d97c92d70186424097b6e366
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fb08bf99195a87c798bc8ae1357337a981faeade
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0c4190b41a69990666b4000999e27f8f1b2a426b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5ce74ff7059341d8b2f4d01c3383491df63d1898
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7a40cbf3579a8e14849ba7ce46309c1992658d2b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a63af1baf0a5e11827db60e3127f87e437cab6e5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e74a069c6a7bb505f3ade141dddf85f4b0b5145a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/efb6402c3c4a7c26d97c92d70186424097b6e366
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fb08bf99195a87c798bc8ae1357337a981faeade
    Patch