01 Record
CVE-2021-22156
An integer overflow vulnerability in the calloc() function of the C runtime library of affected versions of BlackBerry® QNX Software Development Platform (SDP) version(s) 6.5.0SP1 and earlier, QNX OS
CriticalPUBLISHEDCNA: blackberry
CNA base score9.0 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
02 Description
An integer overflow vulnerability in the calloc() function of the C runtime library of affected versions of BlackBerry® QNX Software Development Platform (SDP) version(s) 6.5.0SP1 and earlier, QNX OS
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.79% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 78.2% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-08-17 18:35Z5 YR AGO
- Last updated
- 2025-08-22 15:20Z1 YR AGO
- Reserved
- 2021-01-04
- Assigning CNA
- blackberry
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.0)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-190Integer Overflow or WraparoundBase
- Data version
- 5.1
- Document digest
- e83a16b0abc09c830395c4d43972053c05bd7d10cd35d0a4aab26b7c14447418
05 Affected products
VendorProductVersionsPlatforms
BlackBerryQNX Software Development Platform (SDP), QNX OS for Medical and QNX OS for SafetyQNX SDP 6.5.0 SP1 and earlier, QNX OS for Medical 1.1 and earlier, QNX OS for Safety 1.0.1 and earlier—
06 References
- support.blackberry.comhttps://support.blackberry.com/kb/articleDetail?articleNumber=000082334
- tools.cisco.com20210818 BlackBerry QNX-2021-001 Vulnerability Affecting Cisco Products: August 2021https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-qnx-TOxjVPdL