CVE-2015-6856
Dell Pre-Boot Authentication Driver (PBADRV.sys) 1.0.1.5 allows local users to write to arbitrary physical memory locations and gain privileges via a 0x0022201c IOCTL call.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Dell Pre-Boot Authentication Driver (PBADRV.sys) 1.0.1.5 allows local users to write to arbitrary physical memory locations and gain privileges via a 0x0022201c IOCTL call.
- CVSS 3.0
- 7.8 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.52% probability · 44th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-264
- Affected
- dell/pre-boot authentication driver
- Source
- cve@mitre.org
EPSS 0.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://packetstormsecurity.com/files/134987/Dell-Authentication-Driver-Uncontrolled-Write.htmlExploit
- http://seclists.org/fulldisclosure/2015/Dec/81Exploit
- http://www.securityfocus.com/archive/1/537161/100/0/threaded
- http://www.securityfocus.com/bid/79643
- https://www.korelogic.com/Resources/Advisories/KL-001-2015-008.txtExploit
- http://packetstormsecurity.com/files/134987/Dell-Authentication-Driver-Uncontrolled-Write.htmlExploit
- http://seclists.org/fulldisclosure/2015/Dec/81Exploit
- http://www.securityfocus.com/archive/1/537161/100/0/threaded
- http://www.securityfocus.com/bid/79643
- https://www.korelogic.com/Resources/Advisories/KL-001-2015-008.txtExploit
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.