CVE-2021-47509

Summary

In the Linux kernel, the following vulnerability has been resolved:

ALSA: pcm: oss: Limit the period size to 16MB

Set the practical limit to the period size (the fragment shift in OSS) instead of a full 31bit; a too large value could lead to the exhaust of memory as we allocate temporary buffers of the period size, too.

As of this patch, we set to 16MB limit, which should cover all use cases.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d1bb703ad050de9095f10b2d3416c32921ac6bccaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b02a41eebcc36d4f07196780f2e165ca2c499257affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < be55f306396cd62c6889286a7194fd8b53363aebaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2e54cf6794bf82a54aaefc78da13819aea9cd28aaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 76f19e4cbb548e28547f8c328aa0bfb3a10222d3affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ad45babf7886e7a212ee1d5eda9ef49f696db43caffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 35a3e511032146941085f87dd9fb5b82ea5c00a2affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8839c8c0f77ab8fc0463f4ab8b37fca3f70677c2affected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux4.4.295 <= 4.4.*unaffected
LinuxLinux4.9.293 <= 4.9.*unaffected
LinuxLinux4.14.258 <= 4.14.*unaffected
LinuxLinux4.19.221 <= 4.19.*unaffected
LinuxLinux5.4.165 <= 5.4.*unaffected
LinuxLinux5.10.85 <= 5.10.*unaffected
LinuxLinux5.15.8 <= 5.15.*unaffected
LinuxLinux5.16 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References