BIOS Write Protection Race Condition

published 2018-10-02 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-20672

cvss: 5.9; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits: 0; none known

In some Lenovo IdeaPad consumer notebook models, a race condition in the BIOS flash device locking mechanism is not adequately protected against, potentially allowing an attacker with administrator access to alter the contents of BIOS.

Patch / fix

fixed in 20

hp 310s-14isk_firmware 1.15
hp 320-15ikbra_firmware 6jcn24ww
hp 320-15ikbrn_firmware 6jcn24ww
hp 320-15ikbrn_touch_firmware 6jcn24ww
hp 320s-15ikb_firmware 2.09
hp 320s-15isk_firmware 2wcn38ww
hp 510s-14isk_firmware 1.15
hp 520-15ikbrn_firmware 6jcn26ww
hp 520s-14ikb_firmware 2.09
hp 710s_plus-13ikb_16g_firmware 2.55
hp 710s_plus-3ikb_firmware 2.55
hp xiaoxinair13ikbpro_firmware 2.55
hp 710s_plus_touch-13ikb_firmware 2.55
hp 720s-13ikb_firmware 5scn38ww
lenovo e42-80_firmware 2wcn38ww
lenovo e52-80_firmware 2wcn38ww
hp flex_4-1470_firmware 1.15
hp flex_5-1470_firmware 2.09
hp flex_5-1570_firmware 2.09
hp lenovo_ideapad_720s-14ikb_firmware 6jcn26ww

Exploit prediction

0.53% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.9	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
NVD	2.0	7.0	AV:N/AC:M/Au:S/C:N/I:P/A:C

Affected products

Lenovo Group LTD IdeaPad

Classification

Weakness

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

support.lenovo.com /us/en/solutions/LEN-20184
vendor-advisory

Sources

CVE List CVE-2018-9069
NVD CVE-2018-9069

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary