CVE-2021-3392

Advisory lineage Upstream: 0 Downstream: 5
Modified
Published: 23 Mar 2021, 19:07
Last modified:03 Aug 2024, 16:53

Vulnerability Summary

Overall Risk (default)
low
23/100
CVSS Score
3.2 LOW
v3.1 (nvd)
EPSS Score
0.13% LOW
0% probability +0.10%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

23 Mar 2021, 19:07
Published
Vulnerability first disclosed
03 Aug 2024, 16:53
Last Modified
Vulnerability information updated

Description

A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req' from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.

CVSS Metrics

  • v3.1•LOW•Score: 3.2CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
  • v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.13%• Percentile: 32%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • debian•debian_linux

    9.0 | 10.0

  • fedoraproject•fedora

    33

  • qemu•qemu

    ≥ 2.10.0, ≤ 5.2.0

References (5)