Dell BIOS contains a Time-of-check Time-of-use vulnerability.

published 2023-02-01 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-37353

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits: 0; none known

Dell BIOS contains a Time-of-check Time-of-use vulnerability. A local authenticated malicious user could\u00a0potentially exploit this vulnerability by using a specifically timed DMA transaction during an SMI to gain arbitrary code execution on the system.

Patch / fix

fixed in 20

dell alienware_area_51m_r1_firmware 1.22.2
dell alienware_area_51m_r2_firmware 1.19.0
dell alienware_aurora_r10_firmware 2.3.2
dell alienware_aurora_r11_firmware 1.0.17
dell alienware_aurora_r12_firmware 1.1.17
dell alienware_aurora_r13_firmware 1.7.0
dell alienware_aurora_r8_firmware 1.0.26
dell alienware_aurora_r9_firmware 1.0.22
dell alienware_m15_r1_firmware 2.15.0
dell alienware_m15_r2_firmware 1.18.3
dell alienware_m15_r3_firmware 1.20.0
dell alienware_m15_r4_firmware 1.14.0
dell alienware_m17_r1_firmware 2.15.0
dell alienware_m17_r2_firmware 1.18.3
dell alienware_m17_r3_firmware 1.20.0
dell alienware_m17_r4_firmware 1.14.0
dell alienware_x14_firmware 1.7.0
dell alienware_x15_r1_firmware 1.14.0
dell alienware_x15_r2_firmware 1.8.2
dell alienware_x17_r1_firmware 1.14.0

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 19 mo ago (2025-03-26)

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
NVD	3.1	7.0	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Dell CPG BIOS

Classification

Weakness

CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

References

dell.com /support/kbdoc/000206038
vendor-advisory

Sources

CVE List CVE-2022-34398
NVD CVE-2022-34398

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Summary