Description
DMA attacks on the parameter buffer used by the Int15ServiceSmm software SMI handler could lead to a TOCTOU attack on the SMI handler and lead to corruption of SMRAM. DMA attacks on the parameter buffer used by the software SMI handler used by the driver Int15ServiceSmm could lead to a TOCTOU attack on the SMI handler and lead to corruption of SMRAM. This issue was discovered by Insyde engineering during a security review. This issue is fixed in Kernel 5.2: 05.27.23, Kernel 5.3: 05.36.23, Kernel 5.4: 05.44.23 and Kernel 5.5: 05.52.23 CWE-367
References (3)
Core 3
Core References
Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-450613.pdf
Vendor Advisory
https://www.insyde.com/security-pledge
Vendor Advisory
https://www.insyde.com/security-pledge/SA-2022052
Scores
CVSS v3
6.4
EPSS
0.0015
EPSS Percentile
4.6%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-367
Status
published
Products (1)
insyde/kernel
5.2 - 5.2.05.27.23
Published
Nov 14, 2022
Tracked Since
Feb 18, 2026